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Big Bike(5 posts)

Big BikeEdi B
Aug 9, 2001 12:34 AM
I am 6ft 4 and I want to get a road bike second hand but i am not sure what size (in cm's) to look for. I have seen lots of 53cm and 56cm, is this average size? Would i therefore need a 60cm or more? Cheers.
Look at "Idiot's" Guide to Bike Fit (nm)TrekMan
Aug 9, 2001 1:48 AM
here's the linkET
Aug 9, 2001 5:54 AM
Edi, measure your inseam the right way as described in the link, do the calculation for standover described there and tell us what you get for seat tube size (if you don't know your seat tube angle, use 72). Given your height, you might go off the charts for the available sizes with some bikes (or possibly find the top tubes too long), so you might have to compromise or consider a custom.

Be sure to read at least the first three posts in this link.

ET "the long-awaited "idiot's" guide to bike fit" 8/7/01 10:52am
re: Big BikeDrD
Aug 9, 2001 4:03 AM
A 53 or 56 is not going to work for you - it will be much too small. There are alot of sites out there which describe the basics of bike fit (keep in mind that those are rule of thumb sort of estimates - they will get you something you can work with, but not necessarily the "perfect" size) - www.coloradocyclist.com is as good a place as any to start.

You are probably going to end up needing something in the neighborhood of 60 to 63cm c-c.
Second DrD's motion--you need AT LEAST a 62cory
Aug 9, 2001 7:23 AM
It will vary a little depending on your proportions, as several other people have said. But I'm 6'4", and I ride a 64 or 65cm. Every damn bike dealer on the planet has tried to sell me 60s or 62s because they usually have those in stock, and I've let myself be talked into a couple of 62s over the years. DON'T DO IT unless you're absolutely convinced it fits, and especially don't let them put on a long seatpost and tell you that makes it work.