Bike fit / correct riding position

Will certainly appear as a highly stupid question but let's say if the bike that fits you (talking about a classic horizontal tube, not slopping nor lo pro bike) is for example 54x56, with a 100mm stem ; what would prevent one to use a 55x57 (or 56x57 or 57x57) with a 90mm stem or a 53x55 (or a 54x55 or a 55x55) with a 110mm stem?
Does the bike overall geometry change with top tube/seat tube size (in terms of angles, etc.)?
I guess it is a stupid question since when you compare two different frames they might have different tube angles etc but I guess there are some standards in terms of bike geometries maybe

You can make different sized bikes end up at the same contact point geo by swapping stems, etc. like you suggest. I've used a 55cm Kinesis, 57cm Kinesis and now back to 55.5cm Kinesis all with the same contact points (when I get that stem). If you compared them side by side you'd notice some steering differences but you adapt after a couple of hours and can't tell any more, unless you start pushing the extremes (ie. 70mm stem I had to run because I bought the wrong frame size once) .

Riders will vary widely as to how sensitive they are to handling and weight distribution issues...... and of course it does depend somewhat on exactly what you are doing with the bike..... technical crits on a poor handling bike will not be much fun, and a bike which feels a bit of a handful (or front end shimmy!!) is hardly likely to give you the confidence to carve up a descent at speed!

weight distribution issues

Are you saying I look fat on this bike?

Does anyone have any recommendations for bike fits in or around Amsterdam? I've found a few places that do them locally, but don't really know how to choose one.

Knowing Scherrit, that's exactly what he's saying. :)

Futurumclub do bike fits and have several pricing categories, I might go there soon. Otherwise Energylabs in Eindhoven but they cost a pretty penny, €475,- :)

€475?! I don't think I could justify that...

Futurum does seem the cheapest, I've found a few other ones around Amsterdam that are between €150 and €200. I just don't know whether they're worth the extra money.

Gewoon vragen wat ze doen en vergelijken, denk ik. Zit zelf erg te twijfelen over die fit bij Energylabs, hun fitsysteem lijkt me toch wel heel erg goed vergeleken met de concurrentie. Volgensmij heeft @MementoMori ervaring?

"Op basis van je lichaamsmaten wordt gekeken welke afstelling het beste bij je past"

Van Futurum. Klinkt erg hocus pocus...

Piet de wit in wormer ziet er ook goed uit. €200 is niet goedkoop, maar het geld waard als ze goed zijn. Maar ik weet niemand dat het heeft gedaan

Following on from the earlier recommendations in this thread about Foundation Fit i booked for a full fit/ cleat positioning a couple of weeks ago. I was massively impressed, it was great to do the session at home and Wei was a really great guy so was a really enjoyable few hours. Lots of fine adjustments to my set up made a huge difference to the feel on the bike and its really settled my IT pain so I would definitely recommend anyone considering a fit to get it done. Learned a lot along the way too. Not sure why i've waited so many years to be honest!

Also a big +1 to the after session support and documents. I got lots of further advice on new bike purchasing, and updated CAD drawings too specific for the new build. Definitely not a case of turn up, one fit and thats your lot which I think is pretty important.

Also did a fit with Wei on Tuesday to sort my aerobar position on road bike for bike packing race.

Lots of minor tweaks have made things better. Main difference was some giro semi custom insoles that now support my arch and stop me getting tingly toes when pushing hard.

Good info, thanks. I've never done BF before but my lower back is telling me it's time. How does it work with Wei in terms of getting the setup right equipment wise? Does he have bunch of stems etc for you to try? The worry is my bike is just wrong for me and with a fairly short steerer he won't have much to work with. Still, if it gets me the right dimensions for my next bike it'll be worth it...

I'm pretty sure I saw on his instagram that he has a fully adjustable stem and other deda options. Worst case scenario is he uses the fully adjustable to find what you need and then advises what to buy.

Cheers, i suspect my bike is a total non starter but i'll need some proper dims to get me right for the next build!

So I got a bike fit from Tony Corke via Cloud9Cycles and the attached fit was the result. It kinda means that I have to clear out my stable and almost start again as all my bikes are too big which although nice to have projects and the prospect of genuinely fitted rides is a little annoying as I love my bikes. Anyway, I am still trying to get my head round all these measurements and what stack heights etc mean instead of my previous attitude which was to bodge and ride.

Of course I'm searching too but can anyone look at my measurements and recommend a good road bike to replace my beloved Look KG381 with?

1 Attachment

• Ben road fit.pdf

70mm stem??

Yeah I asked about that as it seemed odd but he said that any frame smaller would be too small and a short stem wouldn't be too much of an issue. He seemed to be of the opinion that stem length was overrated over other issues although it obviously makes the bike a bit more twitchy

Are you a small person?

Yes x

Though not THAT small. 5'6

Still seems odd to me but I that's probably why I leave it to @scherrit.

Yeah that is suspect. I'm a small person and was told to try to get bikes that work for me using a 90mm stem cos of handling or something. But what do I know.

@punkture - But if you love your bikes and you're getting on with them why get rid of them?

Well as I get older and my knees hurt more and my shoulders are all hunched on the bike it's just that bit more painful to put up with great bikes that don't quite fit for some reason hence getting the bike fit. Also my love of my bikes is as much to do with nostalgia as with the way they ride

My missus is maybe an inch or two taller I guess and she's on a longer top tube (or at least longer reach) and a uses a 90mm stem. But she might have long arms and @punkture is a t-rex? I'm just wary of any fit that has people ending up with 'extreme' sized stems.