The Bike Fitting Mega-Thread

I love the Specialized stems like that. Great for minor to major changes in angle. Really worth the price for the adjustment range.

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Their website has them on sale for $36 before shipping. So pretty good deal and like you said, good for some minor adjustments.

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Just wanted to let you know that lowering the saddle really helped. Now at around 39 degree for the knee angle. And it improved a lot :smiley:. Thanks :+1:

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Hi chaps,

I’m looking at trying to improve my pelvic posture - I think the posterior pelvic tilt/flexing of lower back could be contributing to my neverending knee troubles.

I notice now after starting a desk job and after studying so much, I have a more pronounced bend in my lower back.

What can I do to try and reduce this? I’ve lowered the saddle slightly and moved it back about a centimetre to try and recruit more posterior chain and aid the ability to roll forward.

Thanks for sharing!

Hi all,
Hoping someone might be able to offer some advice on my fit.

Overall, I feel relatively comfortable on the bike at low/moderate intensity levels. However, for harder efforts (anything from 100% FTP upwards), I struggle with significant quad burn. At higher intensities, it feels like my quads are doing all of the work and are the main limiter with regards to how hard I can ride.

Measurements are:
-Inseam: 840mm
-Saddle Height (pedal to top of saddle): 895mm
-Crank Length: 172.5mm

Conventional wisdom seems to suggest that quad burn can be alleviated by moving the saddle back which should engage the glutes/hamstrings more. However, I already feel that I am sitting quite far back so I am unsure of what to do.



Any advice would be much appreciated, thanks

Holy cow this is a big thread.

I’m sure it’s in here, but… I’ve been fit on my TT bike and have tweaked position over the years, each time with back and forth from a certain ā€œflying postmanā€. I’m confident in the TT position.

Question is, where do I start to set up fit on a road bike myself without spending $?

Are you are looking to use your TT setup and as a base for road position? If so, I don’t see that as helpful in most cases. Differences in saddles, saddle to bar setup and predominance of using the aero extensions in TT are drastically different from a typical road setup. You can get a basic saddle height as a starting point, but setback and actual saddle use will likely mean it will be different in the end.

Options for starting ā€œfrom scratchā€ include using one of the available apps:

Or you can check out a couple of the links under ā€œGeneral Fittingā€ in my OP at the top, as other starting points.

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Thank you for the link! No, I’m not looking to replicate TT, was mentioning in case there was something useful I could take from one fit to the other

Right, I wasn’t meaning to ā€œmatchā€ the setup between road & TT. I was saying there is not much useful info to be pulled from the TT setup for road use, other than saddle height as a rough starting point.

The difference between road & TT mean a separate fit setup for each without much crossover, since the handlebar setup and body position are so unique.

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Not much to suggest here other than a quick test. If you feel like you are already rear-biased, make a change to shift the saddle forward 10-15mm and do a ride. This will do 2 things in shortening your leg extension just a bit, but mainly change your position over the BB. See how it feels and consider what to do based upon that test.

Hey guys!
I am uncertain on the following: Phil Burt, British cycling fitter, affirms that forward saddle brings to open the hips and engage more glutes.
Then other fitters on YouTube say completely the opposite. I am quite confused. Even if most of the people says that forward position overloads the quads, I tend to agree with Phil. Almost every professional is moving year to year to a more forward position over the bottom bracket.
Any consideration about? Thanks a lot! Enjoy the weekend

Whilst I am no expert it makes sense to me, and he has quite an impressive CV for me to question it. I would go with it and see how it feels.

There are very few absolutes in fitting. General guidelines like you mention do exist but don’t ring true for everyone.

This means it’s necessary to test for each rider, evaluate and adjust as needed. Make a single change, test and see how it works for you.

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Damnit, I intended to not spend money on this as over the years I’ve invested quite a bit of $$$ into TT bike position. Started playing around with myvelofit and suddenly my bank account is $75 lower. Very cool tool, thank you! This will allow me to work through multiple iterations over the year.

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:rofl: sorry for your wallet, but happy on behalf of your body :stuck_out_tongue:

Glad to hear it seems like a useful tool. I’d sure give it a go if I didn’t already have a decent setup & process for my own use.

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Hi all,

After a little bit of advice. I have thrown this saddle on my indoor bike to hopefully make the 1 hour plus sessions a little more comfortable, having already used it before.
I have levelled the saddle by measuring at the saddle top (made the most sense). My worry is, will this place too much stress on the clamp bolts? I have snapped the front bolt previously (the last time I used this saddle) I’m not sure what angle it was at that time, but would like to avoid a potential seat post insertion going forward!

I’m also a larger rider at around 110kg.

Generally speaking, you have this set in the center of the rail length, which seems fine to me. Maybe the saddle is more rear-biased than others with respect to that rail center, but I don’t notice that without a direct comparison.

If you snapped a screw before, make sure you replaced it will a screw of similar or stronger rating if possible. I’d suspect they use a Grade 5 screw at minimum. Using a Grade 8 could be a way to help ensure you don’t have another failure. Also make sure you torque it to the proper amount. Don’t exceed that rating since you would place even more stress on the screw once sitting on the saddle.

If you are able to do so and still worried about load on the screw, moving the saddle more forward will decrease the loading on the front screw. That change will alter your reach to the bars, as well as function leg extension, so keep those in mind and adjust as needed if you head that direction.

I think chad hit the most important points, but I would just add to make sure you have sufficient thread engagement with the front bolt, as well. It looks like the end of the bolt may be sticking out of the clamp, though…if that is the case, you should be fine. Just remember to get the same length if you go to a stronger grade bolt.

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Recently I’ve been having some tenderness around the tailbone area. It doesn’t really bother me when I’m riding my bike.

I have been using the same saddle/fit forever and have never had an issue. Before getting a new fit, what are the possible remedies? I work from home and sit most of the time. Could that be due to bad posture? TYVM