Cervelo Sizing?

Triathlon Forum
1

I was ordering a Cervelo P3 and would like to keep 700c wheels if possible (In order to make switchback between road & tri bike easier) and was wondering based on my measurements if a 52 700c would be my optimal fit or do I need to go to 51 650c?

(8)My height is about 5’8" (172 cm)

(1)inseam about 76 cm.

(7)from the top of my inseam to the top of my chesti s about 60 cm.

(4)from my hip pivot point to my arm joint is about 52cm.

(2)my arm length is 62cm.

(5) is 38cm, (6) is 47 cm.

http://www.bicyclesports.com/images/fitchrt.gif

I would appreciate any input from Cervelo owners!

Thanks!

2

I am fairly sure that you should have no problem fitting well on a “52 cm” (these are all ‘virtual’ sizes) Cervelo P3 with 700c wheels based on your inseam measurement and your height. Extrapolating any useful info from your other measurements is nearly impossible in the real world, as your desired top tube and stem length would depend on your flexibility, riding position preferences, handlebar/aerobar choice, how you sit on your saddle, how you position the saddle on the rails, and whether you use the ‘rear’ or ‘forward’ postion with the Cervelo seatpost head. In any case that longitudinal set up is highly adjustable on these bikes. FYI: I am 5’10" with longer inseam than you and fit quite well on a “55 cm” P2K (the rider fit of the P3 and P2 is almost identical). I hope that helps.

3

I’m of similar proportions and I have a 51cm P3. 650c wheels and I love it. The only weird thing about Cervelos is how short their head-tube is…many other people I see riding P3’s have more stack on steer tube than other bikes.

4

Look at the stack and reach dimensions on the cervelo website. You’ll most likely be able to get low enough on either bike. There is only 9mm difference between the two bikes, so you can go with the 52 and get a shorter stem, by 1cm. I’d only be concerned if you need a short stem, like a 90mm, on the 51. I don’t think you’d want a stem shorter than that as I think the handling would be a bit touchy.

5

Based on the top tube length I think you should fit fine on the 52 (700c).

You might be able to get a little lower on the 650’s, but it is a lot more easier to have just one tire size if you have a road & tri bike.

6

I agree, I think you should get the 52 if you want to stay on 700. Im almost 5’9"" with a long inseam and short torso and I ride a 55 P3, but with an 80 stem. It still handles fine. A 55 would be too long in the top tube for you.

7

Either one. They’re both definately your size and are close enough to each other that either bike can be made to be a good fit.