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?
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
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).
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
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
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
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
😣 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.
😟 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.
😰 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.
😬 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.
😱 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
🫤 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.
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: 4.5 / 5 from 116 reviews.
I decided to give BiSaddle a try because the saddle I had been using for years was resulting in saddle sores from time to time. I wasn't sure what to expect from BiSaddle, and my initial reaction wasn't all that positive based on recommendations of saddle width based on sit bones measurements. However, I connected with Ms. Frederique in BiSaddle support. She was extremely helpful and I felt she was an advocate for me. She made several suggestions regarding my bike setup and also made suggestions relating to what I liked about my old saddle that I was replacing. The process of adjustments to the BiSaddle took about 10 days, but I learned a lot about how to set up a BiSaddle. First, there ARE limits to the adjustments, and you need to be willing to try setups that may not seem to make sense, at least at first. For example, be willing to go "wide" in the rear to see where your sit bones sit on the saddle. I actually went wider than I thought I would need to go, but this actually was the best setup for me. Also, I preferred the saddle wings being "rounded" so I purchased the wedge kit at Ms. Frederique's suggestion. This turned out to be the solution for me...rounding wedge and wider than I thought I would need.
In the end I have a saddle that is now comfortable for me and allows me to ride longer without discomfort. I am now a "fan" of Bisaddle. The saddle I purchased is being used on a smart trainer for Zwifting, but I will look to replace my road bike saddle with a BiSaddle at some point in the future.
Thank you BiSaddle for working with me, and kudos to Ms. Frederique in Customer Support for being an advocate for me, and working with me to resolve the concerns I was having with my new saddle purchase.
Keith G.4/5Verified
I can now ride for hours, PAIN-FREE!
Michael P.5/5Verified
Put this seat on my trainer because I was having a hard time sitting for longer than 45 minutes. Got the bi-saddle put on it and the change was immediate. So comfortable. I can ride for twice as long with no numbness or pain!! LOVE IT.
Timothy W.5/5Verified
I used install guide and then made 2 adjustments on the ride and setup was perfect
Ronald L.5/5Verified
This saddle is working great for me, no numbness. Tried a lot of saddles before this.
Lynne W.5/5Verified
New Tri Bike
Jeff G.5/5Verified
Numbness…gone
Chaffing…gone
Saddle sores…gone
Pain free miles…all of them! 🚴♂️
Gail M.5/5Verified
All good
Roger D.5/5Verified
It’s even truly comfortable and good on soft tissue area.
Adam B.5/5Verified
I’m still in awe on how well this fits my sit bones and the pressure that it takes off of my groin and hips.
Eric T.5/5Verified
This is an amazing and now a standard piece of cycling equipment! I have struggled with saddle discomfort since I started cycling in 2020. I have tried over 6 seats and now I have found the one! I can now ride back to back days without any saddle sores or discomfort from the day before. I highly recommend this seat!
Christopher B.5/5Verified
I'm still making adjustments as it's not quite right yet.
Kendra A.3/5Verified
What a difference it has made. It is a joy to ride now
Mark L.4/5Verified
My second saddle… that should tell you all you need to know
Jerry W.5/5Verified
Rode 125 miles in 4 days with NO discomfort. Truly life changing. THANK YOU!!!
Kathryn B.5/5Verified
Great replacement to my peloton seat. Perfect for longer rides
Jeremy G.5/5Verified
I am a fairly new Velodrome track rider. All previous saddles did not alleviate the persistence numbness due to the aggressive riding position. The Distance 1.0 after final set up fit the bill perfectly. ¡Gracias!
David C.5/5
Wasn’t a fan on how the saddle looked at first.. but all i needed was a ride to become a fan…
Matthew O.5/5Verified
Do most of my training indoors. Had a 56 mile ride to do outside. Longest I had gone was 30. Was really afraid of pain caused by my old seat. Installed this and went for a 35 mile ride. Felt good. Followed up with the 56 a week later and it was a huge improvement. Highly recommend.
Chuck B.5/5Verified
Installed my new saddle last night and rode it for the first time this morning. I can’t remember the last time (ever?) I rode my gravel bike and didn’t think about saddle discomfort. I’m an instant convert. Thank you for the great design!
Gina G.5/5Verified
My Bi-Saddle provides a very definite improvement on comfort and rideability, as I have been currently training with long rides of about 40 miles. However, the saddle seems to me to be dramatically overpriced, when I look at how it is made. It does not seem overly sturdy. I think that if any competitors start offering a similar product, the price would come down.
Craig S.3/5Verified
I put this on my gravel bike, and after some tweaks from the painless and well documented initial setup, I've found it to be very comfortable both on the trainer indoors and 2+ hour rides outdoors. No numbness and a pleasant "in the bike rather than on it" feel when riding. It's been a bit creaky on the rougher bits, but I've lubed the rails where they meet plastic and am happy to report that it seems to be setting in and has gotten quieter as the rides go on. Definitely recommended for extra comfort compared to a standard saddle. I had an ergon saddle before, which is known for relieving pressure on sensitive areas, but this Bisaddle is on a different level!
Michael G.5/5Verified
easy install, has taken a good bit to get used to how stiff the saddle is. I needed to get some prostate relief and the saddle has done the job.
John F.4/5Verified
The numbness disappeared immediately which was a huge relief. After a couple rides and adjustments I found the sweet spot and have been riding pain free ever since. Considering a second saddle for my other bike. I have told a couple of riding budding about the dramatic increase in comfort.
Mark G.5/5Verified
Great saddle. Finally have a saddle that fits right. Just finished a four hour plus gravel ride and absolutely no issues. My butt felt fine and no pain.
Great product!!!!
Bob L.5/5Verified
It works well. I just wish there was an even shorter version available. There's still a nose on the saddle, and it could be at least an inch shorter, maybe two inches shorter.
Nate W.4/5Verified
Excellent product
Eder L.5/5Verified
I LOVE my BiSaddle SRT Saddle! As an Ultra Distance Road and Gravel Racer, as well as bikepacker, I use the SRT 1.0 on my gravel bike, and the Hurricane PRO on my Road bike and Trainer bike. Never have to give saddle or sit bone pain a second thought!
Christie T.5/5Verified
Saddle was easy to install and I immediately noticed a difference in my comfort. Thanks Bisaddle Team!!
Chad M.5/5Verified
I've been battling perennial numbness for months. I had read some pretty solid reviews of the BiSaddle and how effective it was at preventing numbness so I gave it a shot. I can happily report that I have been riding without numbness for close to 2 months now. I am enjoying my rides again! It's been great! If you're still on the fence, know that numbness is not normal. Continuing to ride that way can lead to permanent issues like ED. The BiSaddle was the cure for me and it could be yours. Buy it now!
Cayne Z.5/5Verified
Excellent product!
Eder L.5/5Verified
Easy to instal and adjust. I had to adjust 2-3 times to get the correct fit. I have only ridden 25 ish mile rides and it was very comfortable. When the winter weather breaks I hope to do 50 plus mile rides, that will be the real test.
Robert M.5/5Verified
Wish it had a little more padding but otherwise it has alleviated the numbness a great deal.
Jedediah M.4/5Verified
a major problem solver
Ronald L.5/5Verified
Took a few rides to get it dialed in properly but once I did, it was a game changer.
Steven M.5/5Verified
Finally a seat that works for me. I am actually on my sit bones now and no more sores.
Steven B.5/5Verified
I went from purchasing my first road bike to completing a 113 mile ride with around 4400ft of climibing in the span of two months. This saddle was swapped onto the bike about 2 weeks before the big ride, and after about a week of dialing in the setting, the difference was night and day. I made it through the entire century ride without any pain or soreness and didn't have any the next day! This saddle will be staying on all bikes I have from now on.
Connor S.5/5Verified
Just finished the Hooter then Hell 75 mile ride.
Saddle had around 120 miles on it no issues
Robert V.5/5Verified
Service was excellent… had an exchange and Bisaddle made it easy…. Thx
Francis M.5/5Verified
Really helped with numbness and made aero position especially much more comfortable
Jari N.5/5Verified
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