I am trying to find a road bike for my friend. He is 6’1.5" with a 33" inseam. 58cm? 60cm?
Thanks!
Depends on the brand. I’m a smudge over 6 feet and have a 31.5 in inseam. I take a 58 in a Cannondale and a 59 in a Litespeed. Both have 57 or 57.5 top tubes (I can’t remember which).
With a road bike, it’s more important to fit by top tube length than seat tube.
Sounds about right, but being so dead nuts spot on with a road bike is not as critical in my experience as a tt fit. Once you get down on the aero bars on a tt bike you are locked in to your position more or less, very difficult to effect much change. On a road bike you have the ability to compress/extend your elbows and can hit a myriad of hip angles and positions. But year that sounds about right.
I’m 6-1 and 33" inseam, and I’ve got 3 58s and a 57.
You also need to pay attention to whether that’s a C-T measurement (center of BB to top of seat tube/top tube junction, most common for US brands) or C-C (center of BB to center of seat tube/top tube junction, so effectively about 1cm larger for the same number as C-T; mostly Italian bikes).
Of course that’s assuming a level top tube, which is getting to be more rare these days, so you often get a ‘virtual’ size to account for the sloping TT; however this makes the sizing even more flexible based on just using a longer/shorter seatpost… as said above, the top tube length becomes more of a limiter then.
I’ve got the same dims as you. I ride a 56 Cervelo with a long stem. TT bike is also 56. I can make a 58 fit as well.
I am 6’1.75", 32" (biker inseam floor to crotch), so I am more torso and ride a 60 Cannondale with a 120 stem with one spacer above and a few below the stem, maybe a 5cm drop seat to bars.
The 60 Cannondale and the 58 Cervelo Dual feel as if they were built for me, very easy fitting.
I am trying to find a road bike for my friend. He is 6’1.5" with a 33" inseam. 58cm? 60cm?
Thanks!
On average (across many brands), I’d say a 58cm.