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The Bike Fit Academy
686 members • Free
5 contributions to The Bike Fit Academy
Feb 5 •
Odd feet feeling
Hi all, thanks for the invite. I dunno whether I might need to ask this elsewhere in the group. I’m 39 and road riding/racing since I was 12. As long as I can remember while pedalling my right leg feels like a bit more advanced than the left one. I feel it on my feet. Right foot feels more pressure on the arch area. Left foot feels more pressure on the ball area. Coming back a few years ago, I had a bike fit done. 170mm cranks were fitted and G8 insoles were put in my shoes whic made a hell of a difference, but still there. It is odd as the feeling goes while riding on threshold and above, but comes back while pedalling steady. Hopefully I could get some tips pls. Cheers
1 like • 27d
This sounds to me like a disparity between the mobility of your feet. In other words, one is collapsing more under load than the other. This is likely to change the distribution of pressure on the sole of your feet, which is more noticeable when using a stiff-soled cycling shoe. Although you mention that you've tried insoles, I wonder if they're suitable to address your issue. I find that a bigger, stiffer footbeds, preferably moulded to the rider's feet, are much more effective at addressing structural problems. Or you could go the other way and use very soft and spongy insoles, to mask the difference in plantar pressure.
Jan 24 •
Bike Fit Setups
There are a number of bike fit ‘tools/systems’ used by bike fitters, what is the best?
4 likes • Feb 12
I use 20-point motion capture, by STT. It's very accurate and gives some interesting insights into a rider's symmetry, or lack of it. It's my view, however, that if you can't do a solid bike-fit without the tech, then you probably shouldn't be bike-fitting. There is no method of bike-fitting prescribed by STT; that's up to me.
0 likes • 27d
@Bertram G kinovea is open source, but a bit dated.
Feb 7 •
Seeking Advice: Fine-Tuning My Setup for Scoliosis
I’ve been living with scoliosis since childhood, but it wasn't until I started using an indoor trainer recently that I truly noticed how my asymmetries affect my cycling. I'm 48 now, 185cm tall with an 89cm inseam, weighting 95Kg and not that flexible with my legs, and I’ve spent the last five years cycling actively. However, the static nature of the trainer has highlighted issues I never noticed outdoors. I have a professional bike fit scheduled for this spring to guide my next steps. In the meantime, I’ve used online resources to make the following adjustments to my 2025 Cube C:62 Attain Race (Size 58): - Cockpit: Swapped the stock 100mm stem for a 90mm stem. - Seatpost: Swapped the 20mm offset post for a 0mm offset post. - Saddle: Replaced the stock saddle with a Selle Italia Max SLR Boost TI 316 Gel Superflow (I am also getting a Novus Boost Evo Endurance TM Superflow to compare for free) to resolve genital numbness (this worked perfectly). - Foot Support: Added Sidas 3D slim insoles for high arch support. - Wedging: Right foot: Two cleat wedges. Left: one Inshoe forefoot wedge, one heel wedge - Cleats all the way back and inside (increase stance), feel spot on. The Results: The current setup feels nearly spot on. Combined with my height and fore-aft adjustments, I can now maintain a steady 110 RPM with almost no "dead spots" in my stroke. The Current Issue: My left foot feels slightly "cramped" specifically when transitioning over the top of the pedal stroke (172.5 crank length) and generally after the adjustments my completely loose right foot feels more stable than my left, left foot is not swimming or our of control, it just feels a tad cramped. There is no pain or numbness, just a physical sensation of tightness or restriction at that specific point, no hands or back / lower back issues during my sessions. Looking for Feedback: Does anyone have advice on addressing that "cramped" feeling at the top of the stroke? Also, I would love to see more content or videos specifically addressing bike fit adjustments for riders with scoliosis or similar spine issues.
0 likes • Feb 11
Kostas, I don't recall ever dealing with a foot issue like you mentioned, but I don't have the best memory. Before I would recommend shims or wedges (which I hardly ever need to use) I would want to confirm that the larger elements of your fit are proper. So is your seat position correct, is your centre-of-mass in the right position, is your spine relaxed? Unless those things are good, I think that wedging and shims are a roll-of-the-dice.
Feb 10 •
Saddle tilt
What is the best way and device to measure tilt? I measure the front half of the saddle (Selle San Marco 3dfx) with the app saddle adjust on my iPhone but as it has a camera bump the readings are off. Any other techniques?
0 likes • Feb 11
Put a large, hardback book on the saddle, and use the edge of your phone. If you don't have an inclinometer on your phone, download an app.
Feb 9 •
Frontal Knee Pain.
Hi All, I have changed from 172.5mm to 165mm on my road bike, I have kept the same distance from the bottom of the pedal to the top of the saddle and moved the saddle back about 3mm, but I keep on getting pain in the front of both my knees. Tried to move saddle up a bit but then I start rocking on the saddle. Please help.. What am I missing here? Regards Marius
0 likes • Feb 11
You have probably maintained the same knee angle at the bottom of the pedal stroke, but when the pedal is in the fwd position, your knee angle will be more flexed--because your foot is not so far fwd as with the longer cranks. This is important because that's where you're pushing hard on the pedal. You could try moving the saddle back a bit to open this angle. Also, as Dan mentioned, some adaptation will be required. I recall when I got shorter cranks, I got numb feet for the first ride only.
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@simon-jackson-8371
Bike-fitting for about 13 years. I'm interested in helping others with bike-fitting, learning more, and testing my ideas.
Active 8h ago
Joined Jan 24, 2026
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