A saddle sore is a pressure injury. A 2023 survey makes that hard to ignore: 35 percent of female cyclists reported vulvar swelling after rides, and close to half reported long-term genital swelling or asymmetry that lasted well beyond the ride.
Those numbers describe soft tissue carrying weight your sit bones should support. A saddle with adjustable width changes where that weight lands.
Three Causes Working Together
Medical guidance lists three factors behind saddle sores.
- Pressure pushes soft tissue into bone.
- Friction rubs skin against the saddle.
- Moisture weakens the outer layer over time.
You can manage moisture with clean, dry shorts and chamois cream. You only fix pressure by changing where the saddle contacts your body.
Why Fixed Width Still Leaves Riders Behind
The common advice for women's saddles sounds simple: shorter nose, wider rear. But width is not one number. Two riders who wear the same shorts size can have sit bones set a centimeter apart. A fixed shell cannot match both.
When the rear is too narrow, your sit bones hang off the edges and the saddle pushes into the labia and perineum. When it is too wide, the wings rub your inner thighs for hours. Both errors create the friction and pressure that produce sores.
What Adjustable Width Changes
BiSaddle builds the saddle as two separate halves. Each half slides sideways and pivots on its own axis. The rear width adjusts from about 100 mm to 175 mm. The central channel opens or closes as you move the halves apart or together.
That range matters. You set the wings under your sit bones. The soft tissue between them drops into the central gap instead of being compressed. Blood flow stays open. Numbness does not start. The skin does not get ground against a surface that does not fit.
The BiSaddle Saint model adds a 3D-printed polymer lattice over the adjustable frame. The lattice deforms under the sit bones and stays open elsewhere. With adjustable width and the lattice working together, you tune two things at once: bone support and soft tissue relief.
Measure Before You Adjust
You need one number before you touch the bolts. Grab a piece of corrugated cardboard and place it on a hard chair. Sit with your weight even and lean forward slightly, like you would on the bike. After a few minutes, stand up and find the two deepest dents. Measure between their centers. That measurement is your sit bone width.
Now set the BiSaddle rear width so each sit bone rests on a wing with a few millimetres to spare. Re-measure if you swap from road cycling to triathlon or after a long off-season. The setting is not permanent. Your body changes too.
- Set the rear width so each sit bone sits on a wing, not on the central gap.
- Open the central channel until the labia and perineum have no contact with the saddle surface.
- Adjust the angle of each half to match your pelvic tilt in your most common riding position.
- Pair the mechanical setup with clean, moisture-wicking shorts and chamois cream on friction points.
- Stand out of the saddle every 10 minutes to restore blood flow.
Steps one through three remove pressure. Steps four and five manage friction and moisture. Together they remove the conditions that cause saddle sores.
One Saddle, More Than One Season
Your body shifts. Flexibility changes, weight changes, riding position changes. A fixed saddle that fits in May may press in August. With BiSaddle, you loosen a bolt, move the halves, and check the fit again. That takes minutes.
You can also use the same saddle across disciplines. A triathlon position rotates the pelvis forward and loads the front of the saddle. A road position loads the rear. You can shift the width and angle to match each one instead of buying a different saddle for each bike.
Saddle sores are a fit problem with a mechanical answer. When your sit bones carry the weight, the soft tissue rests in the gap. When the width matches your anatomy, the skin stops rubbing against a too-wide or too-narrow surface. BiSaddle makes that match adjustable. Measure, set, and ride without the pressure that starts the whole problem.
