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BiSaddle ShapeShifter EXT BikeFit Edition Carbon Rail / Flex Base
Regular Price: $324.00
Retail Regular Price: $324.00

Every body is different. Off-the-rack bike seats fit just a handful of people. For the rest of us, we've had to compromise. Riding an off-the-rack saddle is like wearing shoes that are too small or pants that are too tight. 



You can adjust the shape of BiSaddle to custom fit your body and riding style. And, if your riding style or body shape change, you can simply re-adjust for ultimate comfort.

Carbon Rail Edition reduces weight but provides all the benefits of the Flex Frame!

BiSaddle Shapeshifter EXT BikeFit Edition Carbon Rail Adjustable Saddle


  • BiSaddle Shapeshifter is the world’s only adjustable shape saddle. (PATENTED)
  • All components are replaceable making it the last saddle you'll ever need to buy.
  • The split-saddle design can change its width, angle and profile to fit your unique body shape, riding position and riding style.
  • The perfect BiSaddle shape eliminates pain, numbness, discomfort and genital injury!


✓ Adjustable Sit Bone width 100-165mm
✓ Adjustable Saddle width 130mm-180mm

✓ Carbon Rail Saddle weight: 320g +/- 3%

✓ UCI compliant race length (243mm long)

✓ Ultra sleek color combination complete with incredibly attractive BiSaddle and BikeFit Logo
✓ Carbon Rails Reduce Weight
FLEX FRAME - Provides a move forgiving ride but reducing road noise, vibration and allowing the  body to move naturally with saddle pressure for increase comfort.

✓ Takes pressure off your unmentionables or nether region
Helps you ride faster and further without fatigue or pain

*Weight Limit for Carbon Rails: 210-220 Lbs.


Capo Velo:

How it works:

  • The saddle consists of two individually adjustable surfaces that have two points of adjustment each (front and back, meaning there’s LOTS of adjustability)
  • These surfaces are contoured to fit the curvature of the bottom bones of your pelvic girdle (Ischiopubic rami and Ischial Tuberosities to be exact.)
  • These surfaces are mounted on a frame that allows the surfaces to be positioned to allow for both separation and angular variations.
  • This design addresses erectile dysfunction in men by allowing for up to 3/4 inch of separation of the surfaces in the front, which is where the dorsal artery passes under the pubic symphasis (bottom of the V) and into the genitals.
  • By only supporting riders on the bones at the bottom of the pelvic girdle, it also eliminates pressure on the perineum.

bisaddle shapshifter EXT Carbon Rail Width Adjustment

change the shape and width to suit you:

  • Included with the saddle are a flattening wedge and a rounding wedge
  • Test out and find the best shape for your individual needs

bisaddle shapshifter EXT Carbon Rail Shapes

Tech specs Carbon and torque:

  •   Carbon Rails: 6-10Nm
  • 2-Bolt Attachment: 6-8Nm
  • Single Bolt Attachment: 9-10Nm
  • BiSaddle Bolts: 2.8Nm

Download Installation Instructions

Instruction Website and Videos

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