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I want to buy a bike, in this case a moutain bike, and the salesmen always ask my height, I am 1.90m, searching the Internet I heard about "bike fit", so I found some sites that through the measurements of your body suggest which dimensions Should use:

https://www.competitivecyclist.com/Store/catalog/fitCalculatorBike.jsp http://www.argonautcyclecoaching.com/index.php?p=bike-fit-calculator

In my region to make a "bike fit" they charge about $ 600, I found it very expensive, being that I will use the bike to get to and from work (14km).

I wonder if it's really good for me to do, or trust these sites?

P.S.: Translated via google translate, corrections are welcome.

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  • Are you talking about a bike fit (retul.com) or just buying a bike that fits your body ? if the later, any good bike store will help you select the proper sized bike for your body size and type.
    – Max
    May 30, 2017 at 23:39
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    Your idea is correct. Height is only one part of it. Leg-length, arm:leg ratio, spine length, and flexibility come into it as well. Plus any existing aches (ie, I have a lower back injury)
    – Criggie
    May 31, 2017 at 5:52
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    The one thing you should trust is your body. If its hurting, something is wrong with your bike setup, clothes, shoes, posture, or method.
    – Criggie
    May 31, 2017 at 5:54
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    As a point of reference - and I might have been lucky - I bought my hybrid online based only on height. I've done something like 40 000km on it, including daily commutes of a similar distance to you and some 70km/3hour rides. I've never had a bike fit, or any real discomfort.
    – Chris H
    May 31, 2017 at 5:55
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    @Chris - your experience happens with probably 95%+ of bike purchases. If frame size to height is about right, most people can reasonably comfortably ride most bikes reasonable distances without going as far a proper fit. Its only us fanatics that notice the difference of a good fit, and we have a tendency to the fear of god into novices with our horror stories and over emphasis the importance of this stuff. (Lycra and Clipless pedals come to mind as other things of similar nature.). As much of it is the high profit margin 'accessorizing' sales, the shops love us pushing the bandwagon.
    – mattnz
    May 31, 2017 at 19:27

1 Answer 1

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A $600 dollar bike fit would be a professional fit where the set the bike up, adjusting everything to the last millimeter, replacing components as required and making the bike as fast and comfortable as humanly possible. Such a fit will save you a few seconds over a hundred kilometers of riding. For a 14km commute it is not needed. (Everyone would benefit from a good fit, some more so due to discomfort and bio-mechanical problems, but the gains of spending the time and money quickly diminish)

When buying a bike, the most important thing to get right is the frame size, everything else is adjustable (with or without replacing parts). From a simple sales perspective, frame size is determined by height and will probably be correctly chosen 90% of the time using just height.

Best thing to do is buy a bike from a reputable LBS. At no extra cost they should help you select the right bike (size, style etc), and set it up to fit you. They won't go as far as the $600 fit, but should have you riding out of the shop on a bike you can comfortably and reasonably efficiently ride for the distances you are needing. (Things like seat height, handle bar height etc).

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