What a game changer. Purchased this saddle due to chronic prostatitis and instantly felt the difference. If you need a saddle that allows you to ride without constant pressure, you need this product!
BiSaddle
EXT Stealth
Soft Tissue Relief & UCI Compliant
Regular price
$ 279.00 USD
Regular price
$ 249.00 USD
Sale price
$ 279.00 USD
Unit price
per
Specs
Specs
Main Differentiators:
- Relieving numbness, largest cutout
- UCI Length Compliant
- Time trial, e-bike, road.
- Best for Aero position
Specs:
- Adjustable Sit Bone width 100-175mm
- Saddle weight
- Chrome-moly 415g
- Titanium 401g
- Carbon Fiber 360g
- Saddle Length: 243mm
Rail Specs:
- Chromoly / Titanium - 7mm round
- Carbon Fiber - 7mm x 9mm oval
Features & Benefits
Features & Benefits
BENEFITS
- Pain free rides
- Our saddles eliminate pain, numbness, discomfort, saddle sores, and genital injury
- Helps you ride further faster
FEATURES:
- BiSaddle is the world’s only adjustable shape saddle. (PATENTED)
- The split-saddle design can change its width, angle, and profile to fit your unique body.
- If your riding style or body shape changes, you can simply re-adjust for ultimate comfort.
- All components are replaceable making it the last saddle you'll ever need to buy.
How to Choose Your Frame?
How to Choose Your Frame?
Cyclist Weight Limits:
- Chromoly Rails: 280 lbs.
- Titanium Rails: 240 lbs.
- Carbon Fiber Rails: 210 lbs.
The Carbon Rails are not meant for MTB and Gravel. It is best for Tri and Road. It is super light and has a rider weight limit of 210 pounds.
The BiSaddle Chromoly and Titanium rails are round and will fit all seat posts including side clamp, top clamp and stationary bikes (Peloton). The BiSaddle carbon fiber rails/ full carbon fiber race frame have oval rails and will only fit top clamp seat posts or posts specifically made for oval rails.
Cyclist Weight Limits:
- Chromoly Frame: 280 lbs.
- Titanium Frame: 240 lbs.
- Carbon Fiber Frame: 210 lbs.
The Carbon Rails are not meant for MTB and Gravel. It is best for Tri and Road. It is super light and has a rider weight limit of 210 pounds.
The BiSaddle Chromoly and Titanium rails are round and will fit all seat posts including side clamp, top clamp and stationary bikes (Peloton). The BiSaddle carbon fiber frame has oval rails and will only fit top clamp seat posts or posts specifically made for oval rails.
30-Day Guarantee
30-Day Guarantee
You can return this item within 30 days for a refund or exchange. Items returned for fit or style preference must be in new condition with tags. BiSaddle covers return shipping (excludes sale items, prior exchanges, and international orders).
See Returns page for more detailed and refund information.
Free Shipping
Free Shipping
With all purchases over $250 (USA only).
Lifetime Warranty
Lifetime Warranty
Lifetime materials and workmanship warranty on the chassis.
- lifetime warranty on the base frame against manufacturer defects
- 1 year warranty on the surface padding
Saddle Instructions
Saddle Instructions
BiSaddle quick setup guide video. More detailed set up instructions are below.
BiSaddle ShapeShifter Detailed Setup
Step 1. Before removing your old saddle, record two measurements
1a. Saddle height from the top of the saddle to the center of the bottom bracket.
1b. Widest area of saddle to center of handlebars.
saddle height close-up view
saddle width close-up view
handlebar close-up view
Step 2. Measure Your Sit Bones
Obtaining a width measurement for your sit bones (ischial tuberosities) can be useful for establishing a rear saddle width. Most bicycle shops have tools to measure your sit bones, but you can also get a measurement at home using very simple tools and just a few minutes of your time.
Place a piece of clean cardboard on to a hard surface. While sitting pull yourself firmly down on to it. This will leave impressions of your sitbones in the cardboard.Be sure to sit upright and do not wear thick padded clothing.
Use a dark colored crayon to rub across the surface of the cardboard (using the side of the crayon with paper sleeve removed)– this will reveal your sit bone indentations. Mark the center of each indentation.
Use a ruler or tape measure to determine the distance(in millimeters) between the center of the sit bones.Write this number down because you will use it to set the rear width of your saddle.
Consider your riding style and add 0-4cm to your sit bone measurement
Step 3. Setting Up BiSaddle Width
Every BiSaddle leaves our factory with a neutral position that works well for a variety of people. If you’re new to BiSaddle and not sure what you want or need, try this setting first. If you have experience with another saddle and know of specific measurements that you’d like, feel free to adjust to those settings.
REAR ADJUSTMENT: In general, most people prefer a rear width of BiSaddle that’s equal or slightly greater (1cm – 4cm) than their sit bone measurement.To make the adjustment, loosen rear bolts on the underside of BiSaddle and use your sit bone measurement to establish the proper width. The width of the widest point of your BiSaddle should match the width you recorded when measuring your sit bones. Tighten bolts after adjustment is made. Keep surfaces symmetrical unless asymmetry is needed. Using your sit bone measurement to adjust the rear width is meant to be a starting point for achieving comfort. You may find a slightly more narrow or wide saddle adjustment is most comfortable for you.
FRONT ADJUSTMENT: The front width of your BiSaddle is largely up to personal preference. A wider front typically results in better blood flow and/or reduction of genital numbness. If it’s too wide, however, it can cause rubbing or chafing of your inner thighs. We suggest that you set the front of the seat as wide as possible without chafing.
How To adjust width: Loosen (but don’t remove) bottom bolts using the supplied Allen wrench. Adjust the seating surfaces to your desired width, and re-tighten bolts. Double check that both sides are symmetrical and tighten to 3 Nm. Fine tuning adjustments can be made on the trail. We recommend adding the supplied allen wrench to your tool bag. MAX BiSaddle bolt torque is 26 inch/lb or 3Nm.
Note: Do NOT adjust/loosen the nose bolt in the chassis - it secures the rails!
Rear Adjustment: Adjust rear width to match your sit bone measurement. Remember to add your riding position. Measure to the widest point of your BiSaddle and tighten bolts to 3Nm.
Front Adjustment: Start wide and reduce width until the saddle no longer rubs on your inner thigh.
Step 4. Installing BiSaddle on Your Bike
Fore-aft: To set the fore-aft adjustment, replicate your old seat measurement from the widest point of the saddle to the center of the stem clamp.
Height: Install BiSaddle and lightly tighten your seat post bolts, while still allowing for some movement and adjustments. Set the saddle height to match your previous seat height.
Tilt: Most cyclists prefer a seat that is level to their bike or slightly tilted downwards. When setting the tilt of your seat be sure your bike is on level ground and use a level to set the seat to your desired tilt.Small adjustments to tilt can often help you achieve ultimate comfort.
DOUBLE CHECK THAT ALL BOLTS ARE TIGHTENED PROPERLY BEFORE RIDING YOUR BIKE!
RAIL TORQUE SPECS: Carbon Rails: 6-10 Nm,6-8 Nm for 2-bolt, 9-10 Nm for single bolt
MAX BiSaddle bolt torque is 26 inch/lb or 3 Nm.
Do NOT adjust/loosen the nose bolt in the chassis - it secures the rails!
Bring the supplied Allen wrench along with any other necessary tools on your first few rides, as some small adjustments may be necessary to get the position 100% dialed in. Often times a small adjustment in height, tilt, or fore-aft can make a big difference in comfort. Also feel free to experiment with the saddle width, always making sure to carefully adjust it and properly tighten the bolts before riding again.
Step A. Optional Profile Wedges
Wedges are an optional add-on to your BiSaddle purchase. They are available here. These can be installed between the base of the saddle and the two saddle surface pads to change the shape across the saddle top. Making it either more flat, or more rounded. Note: Only use wedges if you are unable to get comfortable with a standard BiSaddle setup.
Wedge Screws: Longer screws are needed for the wedges and are included in the wedge kit.
SRT Rounding wedge: front bolts 14 mm, rear bolts 20 mm.
SRT Flattening wedge: front bolts 18 mm, rear bolts 20 mm.
EXT Rounding wedge: front bolts 14 mm, rear bolts 20 mm.
EXT Flattening wedge: front bolts 16 mm, rear bolts 20 mm.
There are no absolute rules that dictate who should use wedges. In general people with good flexibility and forward hip rotation tend to prefer a flatter saddle. People who aren’t as flexible and/or to struggle with saddle sores tend to prefer a more rounded saddle. We suggest you start with no wedges, and add them if you run into a specific problem.
Additional Instruction:
2 hole front surface nut adjustment:
Your BiSaddle may be equipped with a 2 hole front adjustment nut. You can determine if you have the 2 hole nut by removing the front bolt and looking under your BiSaddle. To adjust the front of your saddle more wide or more narrow it may be necessary to remove the front bolt and re-install it into the desired nut hole.
Optional rear bracket:
The rear bracket is optional and is only compatible with the flex frame. It will not work with the full carbon fiber frame. The rear bracket can be used to hold your bike onto a race transition bar or used to hold a water bottle or tool bag. To install the rear bracket you should place the supplied nut into the base of the frame and insert the bolt from the rear of the frame and tighten.
Removing or Changing your BiSaddle Padding/Surfaces
After riding, adjusting, and re-riding your BiSaddle, it may be desirable to try different surfaces to get fully comfortable. Alternate surfaces are available here.
All BiSaddle base frames and surfaces are interchangeable. This means you can replace your surfaces without changing the base. To remove the surfaces, all 4 adjustment bolts will need to be removed from the bottom side of the base frame. Once all the bolts are removed, you can proceed to install the new surfaces on to the frame and re-install the bolts. Please make sure the bolts are tightened before riding.
Bolt sizes for surfaces
SRT 1.0, Saint, Saint Pro 3D, Hurricane, Hurricane Pro 3D
Front adjustment bolts: 14mm
Rear Adjustment bolts: 16mm
Stealth, Bonneville, Sprint
Front adjustment bolts: 12mm
Rear adjustment bolts: 16mm
TROUBLESHOOTING:
Surfaces are moving while riding: If after long rides you find that the surface shave moved, then reposition them to your desired width and tighten bolts down beyond 3 Nm and re-ride. Tighten bolts until the surfaces stop moving.
Asymmetry: Some cyclists may need the saddle surfaces asymmetrical to get comfortable. This means one side may be adjusted differently than the other to provide comfort for those with hip alignment issues or injuries.
Sit bones rolling off the inside or outside of saddle: If your sit bones are rolling off the inside of the saddle surface, then try adjusting the rear width of your saddle a little narrower. If your sit bones are rolling off the outside of your saddle surface, then try adjusting the rear width of your saddle a little wider. Note: You may also want to try lowering your saddle height. If your saddle is too high and your legs are over extended, then your body will be forced to roll side to side to stay on your pedals.
Tailbone pain: Try adjusting the rear width to a wider position to allow room for the tailbone.
Making contact with flex frame base: If while riding you are making contact with the flex frame base, then try a wedge to raise the surfaces. If after trying the wedges you are still making contact with the frame, then contact us to discuss the option of trying a rigid carbon fiber frame.
Race transition mounting problems: BiSaddle is considered a noseless saddle, which can make it difficult to keep your bike on the transition bar when held by the nose. We recommend using a zip tie or velcro strap to hold your bike on to a race transition bar.
BiSaddle seems confusing: Don’t give up. Your ultimate custom fit saddle may be just a small adjustment away. Try learning a little more from our videos at bisaddle.com/pages/instruction or call us to see if you qualify for a free saddle surface trade.
Unable to get comfortable: If you have tried multiple widths and wedges and still cannot get comfortable, then please call us for further troubleshooting at (877) 397-2165. When adjusting your BiSaddle, Always let comfort be your guide!
WARRANTY:Your BiSaddle comes with a 1 year warranty on the surface padding and a lifetime warranty on the base frame against manufacturer defects and only applies to the original owner. Wear and tear is not considered a defect. Please contact us if you feel there is a defect with your BiSaddle. hello@bisaddle.com or (877) 397-2165
Why Bisaddle?
Hear what our Customers have to say...
11,312 Miles
James Lawrence, the Iron Cowboy, rode our saddle 11,312 miles in 101 days setting a world record without getting any saddle sores. #IronCowboyTested
Bisaddle Difference
"Most riders think it's normal to be uncomfortable on their saddle as they give up comfort for a lighter saddle, but BiSaddle allows you to never miss days of training and stay in aero for longer.""
- Ellie Salthouse
Ironman Champion
Adjustable to Your Body
The split-saddle design can change its width, angle, and profile to fit your unique body.
Why are our saddles shorter?
Reduce Perineal Pressure
Shorter saddles minimize pressure on the perineum, preventing numbness and health issues like erectile dysfunction.
Improves Blood Flow
Noseless designs enhance blood circulation, reducing the risk of discomfort and genital problems.
Enhanced Comfort
Shorter saddles support the sit bones rather than the sensitive perineal area, making long rides more comfortable without sacrificing control or stability.
Increases Riding Duration
Riders are likely to cycle longer and with better performance, as they are not hampered by discomfort or numbness
Prevention of Erectile Dysfunction
Studies have shown that using a noseless saddle can significantly reduce the risk of erectile dysfunction by relieving the pressure that a traditional saddle places on the penis.
Proven Healthier by Research
Studies show noseless saddles lead to improved health outcomes for frequent cyclists.
Reduce Perineal Pressure
Shorter saddles minimize pressure on the perineum, preventing numbness and health issues like erectile dysfunction.
Improves Blood Flow
Noseless designs enhance blood circulation, reducing the risk of discomfort and genital problems.
Enhanced Comfort
Shorter saddles support the sit bones rather than the sensitive perineal area, making long rides more comfortable without sacrificing control or stability.
Increases Riding Duration
Riders are likely to cycle longer and with better performance, as they are not hampered by discomfort or numbness
Prevention of Erectile Dysfunction
Studies have shown that using a noseless saddle can significantly reduce the risk of erectile dysfunction by relieving the pressure that a traditional saddle places on the penis.
Proven Healthier by Research
Studies show noseless saddles lead to improved health outcomes for frequent cyclists.
Do you experience any of these painful saddle symptoms? The Fix is Bisaddle
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😣 Pain
“Usually the pain begins after 3 miles, and boy do I hate bumps of any kind!”
Pain can be experienced when body weight is supported by the soft tissue between your sit bones.
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😟 Numbness
“After 10-15 miles, I would develop numbness”
Bike saddles can cause men and women to put pressure on the perineum, which is the area located between the external genitals and the anus. This pressure causes arteries and nerves to compress, resulting in reduced blood flow and sensation to your genitals.
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😰 Discomfort
“I have tried an exhausting number of bicycle seats and haven’t found a comfortable saddle”
Saddle padding shouldn’t be excessively thick or soft. This causes the padding to squish down under the sit bones – and pushes up in the middle – adding pressure and discomfort where you don’t want it.
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😬 Saddle Sores
“I had trouble with numbness and saddle sores while in aero position”
When you ride in the drops or in aero position your pelvis tilts forward (three degrees more for women then men), which can take pressure off the sit bones and can re-distribute it on soft tissue area causing sores and numbness.
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😱 E.D.
“I was holding back on extra and long distance rides because I was worried about “ED”
“There are only two kinds of male cyclists – those who are impotent and those who will be impotent.” – Dr. Irwin Goldstein
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🫤 Soft Tissue Damage
“I was miserable on my saddle and developed certain “female” issues”
A recent article indicated that 30% of the professional female riders the author knew, required genital surgery from damage due to saddle pressure.
Which Saddle is Best for You?
Take our 4 question survey and get paired with the saddle best for you.
FAQ
Does BiSaddle fit Women?
Women have found BiSaddle to provide comfort when no other saddle could. Click Here for reviews from women.
Does BiSaddle fit Men?
Men have used BiSaddle to increase blood flow and reduce numbness. Click Here for reviews from men.
How wide or narrow is a BiSaddle?
The rear adjusts from 132mm to 185mm. The front adjusts from 40mm to 75mm.
How do I adjust a BiSaddle?
Simply loosen the 4 bolts on the underside of BiSaddle and slide the rear and front to your desired width, then retighten bolts.
How do I know it will work for me?
Not only can you adjust the width of BiSaddle, but you can also adjust how round or flat each side is. This provides every adjustment needed to get a perfect fit.
We offer a 30 day money back guarantee if you can't get it to work for you.
How about MTB, Tri, Road etc?
Cyclists from all backgrounds can enjoy adjusting BiSaddle to provide a fit that reduces rubbing, saddle sores and numbness.
How does it effect blood flow?
Pressure mapping has shown BiSaddle to relieve pressure and increase blood flow in all riding positions.
Will BiSaddle fit my bike?
The BiSaddle Chromoly and Titanium rails are round and will fit all seat posts including side clamp, top clamp and stationary bikes (Peloton). The BiSaddle carbon fiber frame has oval rails and will only fit top clamp seat posts or posts specifically made for oval rails.
Customer Reviews
Overall rating: 4.4 / 5 from 125 reviews.
My new bisaddle seems to be better than other bike saddles I’ve used over the last 3 years. I’m still tweaking my fit and testing out the feel. So far it seems to have made a difference, but my complete verdict isn’t out yet. I’ll wait until I do a long ride outdoors before I make my final determination.
I have had bisaddle on 2 mt bikes for a couple years now and really like them. so, when I needed a new saddle for my road bike I went right to the bisaddle again. after a couple rides and fine tuning it is totally awsum!!
I was looking for a saddle to be able to ride with chronic bottom fissures. I tried two Fizik models and nothing has given me as much comfort as the BiSaddle EXT Stealth. The condition I have is very painful and I thought that my riding days may have been over, but thanks to the BiSaddle I'm able to at least put in 10-15 miles, which is much better than nothing. This is a great product and the best saddle I've ever used.
Ok , Gota to say this saddle is the most comfortable in my 43 y year of pushing pedals ! Did have to make adjustments three times which is very easy before reaching my comfort point !I usually try to average 300 miles a week ! Look & quality seem to be great and love how it looks on my Trek road bike . Would definitely recommend but take the time and miles to find your comfort point ! Happy costumer from North Carolina 🚴♂️🚴♂️🚴♂️
very comfortable seats so happy to own one
I had a prostatectomy due to cancer and needed a saddle that provides maximum perineum relief to avoid potential medical issues. I have been an avid cyclist for 20 years and the thought of having to give it up was unimaginable. The EXT Stealth has delivered a future of continued cycling enjoyment since there is no noticeable perineum pressure. Thank you!
Love this saddle. The adjustability is great.
I've tried probably more than a dozen saddles, and this is the saddle I'm getting for all my bikes. I already have three of them, and I'm saving for a fourth. I wish there was a cheaper alternative, but there is not. And the quality is top notch. I'm a 5'8" woman with size six pants. I've never had children. I'm in my forties and I've been a lifelong athlete. I never thought I'd struggle so much with saddles. This saddle has solved so many of my issues, from saddle shoes to skin tears, and i can now both enjoy a long ride and have fun times with my husband on the same day. I wish this wasn't something I celebrated, but after years of pain, I am. Thanks to the team for changing my bike life!
I have battled with finding the right saddle for years. I kept trying different seats only to settle with half ok. I saw the bisaddle and thought ok another saddle that will not work. It took me over a year before finally giving it a try. All I can say is I wish I had done this years ago. I love this saddle.
5 stars reflect the usefulness to find the best width and shape combination and the comfortable rides afterwards. I like the cushion it gives and so far has been a great saddle. Challenges: 1- my seat clamp adjusts by 2 screws. The top screw is not reachable because of the saddle plate. No biggie, I just had to play with the one screw that adjusts from the bottom. (I suppose you could drill the plate but that wasn’t necessary). 2- the saddle and cushion add to the height, so I had to lower the seat to compensate for that. 3- Some adjustments on the road are hard to make. 4- It is a heavy saddle…, but I don’t care haha, it is worth the weight.
Was looking for a seat that would work on road bike for triathlons in aero position and also for road rides using my handlebars. It works great for being in aero (a bit hard and does require some re adjusting on the seat) but is really uncomfortable in a more upright position.
I’m recovering from prostate surgery so needed a saddle with a huge cut out. Tried numerous other more conventional saddles with cut outs that just didn’t work for me before discovering the BiSaddle. Making adjustments is easy and I’m riding with complete confidence knowing I am protecting my prostate.
I love this saddle! Since switching to BiSaddle, I no longer have numbness or nagging saddle sores!
I did fool around with the adjustment and currently find the wide front to be most comfortable for me. I am 5’ 10” and have found the nose having the wide gap allows my to ride in comfort and my bat and balls don’t get squished or pinched.
Refurbished EXT Stealth Time Trial(Surface/Rail may have small scuffs or imperfections)
Great product, very comfortable and my go to saddle now
Took a little tinkering to get the fit right but I'll be buying more bisaddle saddles for other bikes of mine in the future
Refurbished EXT Stealth Time Trial(Surface/Rail may have small scuffs or imperfections)
Pretty good saddle. It isn't the most comfortable thing in the world, but I didn't expect it to be and it isn't how it is advertised. It is mean to not make you numb, and it does that well!
Awesome saddle and incredible service from the BiSaddle team particularly from Cindy Walsh. Cindy is excellent and called me directly when I had questions after i purchased a saddle. I recently raced Chattanooga 70.3 with mine and had a new PR on the bike.
I have never felt so comfortable on the bike. This saddle is a complete game changer.
Best investment into the long distance rides while in Japan, 80-100 km per day. Loved it. Thanks
Refurbished EXT Stealth Time Trial(Surface/Rail may have small scuffs or imperfections)
This is the most comfortable saddle ever! It took me 8 different saddle to give in and try it. Why did it take me so long, because no one I knew had ever heard of it. I love it! I road with complete comfort while participating in a 536 mile ride. No rubbing , no sores, and absolutely no pressure!!!
I love the way the it feels. It has definitely helped with the rubbing on my long rides. I would recommend the Bi Saddle to anyone looking for a new seat.
Little more time to set up, but I have them on all 3 of my bikes and definitely worth it.
Refurbished EXT Stealth Time Trial(Surface/Rail may have small scuffs or imperfections)
I have four bikes and now I have four bi saddles. You can absolutely feel the difference when you get on the bike, particularly after a long ride. I would recommend the saddle to anyone having problems adjusting to a bike seat or with prostate issues.
I have had an Artificial Urinary Sphincter and it takes pressure off this device
The saddle allows me to ride without the usual numbness and pain that I had been experiencing before.
I’ve tried numerous saddles over the years and having an adjustable saddle made all the difference!!
It replaces my supposed superior Italian saddle. No comparison. It's more comfortable
I have a big butt, so I adjusted the seat (both front and back) as wide as possible. Discovered, I couldn't adjust the front as wide as possible if the rear is set to widest position. But - used it anyway. Sit bones still were uncomfortable - BUT that issue is minor(?) compared to the benefit. Benefit: Rode 351 miles. No more lower back pain and no more male organ pain or discomfort.
For the most part I've been happy with this saddle. After a month of riding and adjusting i can't seem to get it dialed in. I'm still experiencing sit bone pain after an hour in the saddle. I hope to exchange this saddle for maybe a different design? Thank you bi saddle for extending my 30 day warranty to an additional 20 days for $29. Hopefully we can get this problem resolved.
I love it. I'm disabled and I've been pretty sedentary so I'm just getting my strength back and don't ride very far. That said, I think my sits bones are wider than most people maybe because I need to have the back almost as wide as possible and still feel like I'm kind of sliding off the sides of it. I think if I were going father distance I would chaff on my inner leg with it set so wide but for my short distances it works with zero pressure on my soft tissue which was essential. My saddle cost way more than my bike and I went into debt for it but it let's me ride! My dog is stoked too.
So far it’s so so. I have it as narrow as it will go and yet am still getting some rubbing. I’ll make a few more adjustments - level and distance from the bars before I have a final thought.
Feels like I could ride forever!
Bi saddles are great
I love it very comfortable than my previous seat.
Slowly replacing all my seats with bisaddle. Highly recommend
Extremely comfortable, love how adjustable & custom the seat can be
Love how adjustable the seats are. Literally way more comfy
Great communication with the team when I determined I needed to swap saddles. Main issue with my set up has been fixed so life on the trainer is much improved. Thanks for the product and support!