Proportions of a porn star. Oh yeah.

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customerjon @gmail.com is where information happens.

I tend to think a 52 cm would be a bit small. If you use the standard formula for frame size of multiplying inseam by .67 we get 85.8 X .67 = 57.486. You'd likely want your frame slightly smaller for TT so a 56 cm frame seems bang on.

What aero bar combo are you running? I'd suggest at 75 degrees you should run an aero bar one size smaller. That's what I did with my TCR when at 75 degrees and it worked great.

The only way to know for sure is to go to a Cervelo dealer and have them size you. I don't know the shops in Montreal but in Toronto I'd recommend either Endurosport or La Bicycletta. If you call La Bicycletta ask for Heath Cockburn. He used to be sales manager for Cervelo.

i am also 5'10". inseam = 33 (shorter than you) torso = 24.5 (longer than you)

A 56 is waaay too big for me for a tri position. I was fit to a 53 tequilo (78 degree) and it seems to fit well.

AI suggest you take your inseam, multiply it by zero and divide that by your torso length + your reach. From there you should take that number to a fitter and tell them this number, with the word "ground" in front of it, is where you want to start looking for a new frame.

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jg

Everybody's a comedian....

BTW, thanks for the validation.

Man I can't wait to get on a properly sized frame!

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one more thing... i could have gone with either a 53 or the 55 (which is actually 1 cm longer on the TT at 54) but going with a 55 would meake me have to choose between 650 and 700 whereas the 53 was only 650 - not wanting to make that choice for fear of forever wondering what if, i took the easy way out. With your short torso i am thinking 53/52 sounds in the ball park.

what did your calculation come out to anyway? kidding.....

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jg

"A 56 is waaay too big for me for a tri position"

It depends upon the bike and how they are measured. Different companies measure differently.

DRAwp mentioned Cervelo. Gerard has stated that Cervelos are designed so that an x size road bike will generally fit the same size Cervelo. My guess is that he probably wants 700c wheels so should be maybe looking at a 55 cm Dual/P2K/P3. 52 cm seems just too small. Realize that he is a TT guy (based upon his previous posts) not a trigeek so that means not having to run afterwards and having a slacker riding position.

The only way to know exactly is go down to the local Cervelo shop and have them do a fitting.I mentioned La Bicycletta in Toronto specifically because they are a road/TT/tri shop in that order. They would probably be more likely to set him up Tyler Hamilton style. Endurosport is more tri orientated. He should contact Heath at LaBicycletta because Heath has done TT's on Cervelo bikes.

I'm just under 6ft. I have a TT bike w/ a 54cm top tube and an 80cm stem. My road bike is a 55.5 and a 120cm stem. Both fit like a glove. Can you ride both TT lengths and se which feels better? If so I'd try that. Even if it meant bringing in a trainer and riding them in the shop for 45 min each

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Brian Stover USAT LII
Accelerate3 Coaching
Insta

i am with you that it depends on the bike, but when i say a "56 is waaaaay to big for me," I am talking Top Tube, which in my opinion is the most important thing to be talkin... so no matter the manufacturer, for me a 56 is waaaay too big, period.

one of my training buddies rides a size 56 Soloist. He is 6'2" and commented last week he feels a bit stretched out in the time trial position (seat post rotated around to forward position) - he does look it also which is why he doesn't ride very long in his aero bars.

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jg

My sternal notch doesn't even come close to the floor.

Thanks for the replies, guys. Cerveloguy seem to have the best advice, as nothing beats talking to someone who does TT's. I may end up having to make a trip to Toronto to La Bicicletta.

I used to do tri's (on converted road bike), and I have to say that I don't miss running off the bike at all...

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