's Forum Archives - General

Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )

What size road bike to look for(5 posts)

What size road bike to look forjunbug
Dec 2, 2001 11:46 PM
I'm around 5'7" w/ a 30" inseam, roughly which size road bike should I start my search w/? Thanks!
Have you measured properly?DCW
Dec 3, 2001 1:44 AM
If you haven't, start with Colorado Cyclist's pro fit guide:

I'm also about 5'7" but even though I wear 30" inseam pants, my properly measured, cycling inseam is almost 32". Depending on the design and method of measurement (center-center or center-top), I have fit comfortably on frames from 53cm to 56 cm. My current ride is a "square" Guerciotti (54 x 54 top tube).

If your cycling inseam really is 30", you are probably in the 50-51cm seat tube range.
re: What size road bike to look forDave Hickey
Dec 3, 2001 3:51 AM
I'm your size and I use between a 50cm-52cm(center to center). Remember bike companies measure differently. Some are center to top and others are center to center. It's a good place to start but you should really be fit at a LBS.
re: What size road bike to look forMarkP
Dec 3, 2001 4:28 PM
Besides the Colorado Cyclist site, also check out They have a thorough measurement process that should help you. I am 5'9" with a 31.5 inseam and ride a frame that is 54 or 55 center to top, or about 53 cm center to center. A very important factor is the top tube length. Pay lots of attention to that and your stem length.
re: What size road bike to look forCT1
Dec 4, 2001 9:19 PM
Assuming your inseam measurement is correct you should be on a 52-53cm CT frameset. The exact size will be dependent on the particular frame. Check TT length and see what seems to work for you. Oh, DON'T get a too small frameset if you plan on using a threadless stem system.