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Sizing - Cervelo S2 - 185.5cm/6'1 with 90cm/35.5 Inseam

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Sizing - Cervelo S2 - 185.5cm/6'1 with 90cm/35.5 Inseam

Old 11-09-14, 01:54 AM
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Sizing - Cervelo S2 - 185.5cm/6'1 with 90cm/35.5 Inseam

Buying a new bike and struggling to find the correct size, I'm 185.5cm and I think my inseam is almost 36 inches.
I measured it by pulling up on an object whilst wearing cycling shorts.


Can anyone shed some light on which size frame I should go for? Would a 56 be too small? A 58 be ideal? I am 16, could grow slightly more.



185.5cm/6'1 Tall
35.5-36in Inseam

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Old 11-09-14, 04:29 AM
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You are an astute young man to ask. We are the same size. Still growing? Get the 58 and not the 56. If you make it to 6'3-4" which you likely won't but hard to say...then the 61 would be best. But 56? No. In fact, I like that bike as well, and would probably choose the 61 because I would size up because I am over 3 X's older than you and need the stack height. I like to ride up and out and you being more flexible can ride a bit more down and in..but you will need a 130mm stem on a 58 for the best fit I believe with a good amount of drop. A 58 will still give you a racy fit.
Let us know what you think if you get the bike.
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Old 11-09-14, 06:13 AM
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Originally Posted by Campag4life
You are an astute young man to ask. We are the same size. Still growing? Get the 58 and not the 56. If you make it to 6'3-4" which you likely won't but hard to say...then the 61 would be best. But 56? No. In fact, I like that bike as well, and would probably choose the 61 because I would size up because I am over 3 X's older than you and need the stack height. I like to ride up and out and you being more flexible can ride a bit more down and in..but you will need a 130mm stem on a 58 for the best fit I believe with a good amount of drop. A 58 will still give you a racy fit.
Let us know what you think if you get the bike.
Thanks for that, Yeah I think I am leaning towards the 58 just to future proof it I suppose, in case I grow taller. I work at a shop, and the biggest S2 we have is a 54 at the moment. I had the seatpost at the minimum insertion and it was just a touch too low, So I believe the 56 won't offer much more would it?
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Old 11-09-14, 07:13 AM
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58
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Old 11-09-14, 08:04 AM
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Originally Posted by mattwilkinson
Thanks for that, Yeah I think I am leaning towards the 58 just to future proof it I suppose, in case I grow taller. I work at a shop, and the biggest S2 we have is a 54 at the moment. I had the seatpost at the minimum insertion and it was just a touch too low, So I believe the 56 won't offer much more would it?
Quite right...you would be at or near min insertion with the proprietary Cervelo aero seatpost on a 56. You will be OK with the 58 with your inseam.
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Old 11-09-14, 11:04 AM
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Originally Posted by mattwilkinson
Thanks for that, Yeah I think I am leaning towards the 58 just to future proof it I suppose, in case I grow taller. I work at a shop, and the biggest S2 we have is a 54 at the moment. I had the seatpost at the minimum insertion and it was just a touch too low, So I believe the 56 won't offer much more would it?
Not sure why so many believe in the myth you stop growing at 18... I was the only one among my friends who didn't grow while in college. Plenty of people keep on growing until 21.
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Old 11-09-14, 11:20 AM
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Originally Posted by zymphad
Not sure why so many believe in the myth you stop growing at 18... I was the only one among my friends who didn't grow while in college. Plenty of people keep on growing until 21.
The 58cm will likely fit well now, but with those long legs you might still have a bit of growing to do. If yo get any taller a 61cm might fit better.

I'd go with the 58cm frameset, and in a few years get a bigger frameset if you need it. You'll probably want something different by then anyway.
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Old 11-09-14, 11:53 AM
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OP, your geometry chart looks like it's for the old S2. If you're buying a 2014+ S2 the geometry is different (more stack.)
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Old 11-09-14, 02:33 PM
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Originally Posted by BoSoxYacht
The 58cm will likely fit well now, but with those long legs you might still have a bit of growing to do. If yo get any taller a 61cm might fit better.

I'd go with the 58cm frameset, and in a few years get a bigger frameset if you need it. You'll probably want something different by then anyway.
Haha, quoted wrong person. I stopped growing in HS. And ride a 52 with 53.7 TT. Think Campag4life gave awesome advice.
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Old 11-09-14, 02:43 PM
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Originally Posted by Dunbar
OP, your geometry chart looks like it's for the old S2. If you're buying a 2014+ S2 the geometry is different (more stack.)
Thats strange, That was off the Cervelo website when on the S2 page.
Apparently this one would be correct...




Any major changes?
Attached Images
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Old 11-09-14, 02:49 PM
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Originally Posted by mattwilkinson
Thats strange, That was off the Cervelo website when on the S2 page.
Apparently this one would be correct...




Any major changes?
Doesn't seem that would change anything other than you won't have to use as many spacers, just slam the stem down It just looks to me Cervelo trying to fit the bike onto a bigger population. Maybe their sales are down and can't depend on hardcore racers and triathletes anymore?

Maybe Cervelo got mad seeing people using spacers on their S series and it was ruining their prized, spamming of aero cutting through wind mantra. Must add stack to frame to slam stems, must maintain aero aesthetics!

Lovely bike with nice components. Too bad they use cheaper FSA brakes and cheaper FSA cranks though. Guess Cervelo was too cheap to use Rotor's BBright to 24 adapter for 5800 lighter, stiffer crank.

Last edited by zymphad; 11-09-14 at 02:57 PM.
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Old 11-09-14, 03:13 PM
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Originally Posted by zymphad
Doesn't seem that would change anything other than you won't have to use as many spacers, just slam the stem down It just looks to me Cervelo trying to fit the bike onto a bigger population. Maybe their sales are down and can't depend on hardcore racers and triathletes anymore?

Maybe Cervelo got mad seeing people using spacers on their S series and it was ruining their prized, spamming of aero cutting through wind mantra. Must add stack to frame to slam stems, must maintain aero aesthetics!

Lovely bike with nice components. Too bad they use cheaper FSA brakes and cheaper FSA cranks though. Guess Cervelo was too cheap to use Rotor's BBright to 24 adapter for 5800 lighter, stiffer crank.
Believe the S3 uses the Rotor crank plus a different fork...same frame.
As to the stack or headtube height, for some reason the bike is said to be quite aero with the substantial stack. For the dem that wants to ride the bike slammed there are -17 stems which will generally get the bars low enough...especially if you size the frameset small relative to rider size. I personally like the ample stack height with my long legs. Top racers will many times ride custom carbon frames with shorter head tubes anyway. Elite racers may like a shorter head tube...why Speicalized shortened the head tube on the Tarmac a few years ago...but believe average guys who account for greater sales volume will appreciate a full head tube length. I heard the new S5 is going to a shorter head tube as a departure from the S2/S3 frameset...the latter being a great value and aero bike for those not looking to lose their fillings like the earlier S5 which was one of the hardest riding bikes on the market. The S2/S3 maybe the best aero bike on the market for the money...many believe the ride comfort and overall feel of the bike rivals the R series which is an excellent all arounder.
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Old 11-09-14, 04:02 PM
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Yeah the 2/3 across all cervelo lines is the same frame, cheaper fork and components. And yes, the new S5 has a lower stack.

edit: fork wise, somebody on slow twitch measured the p2/p3 fork and while the p2 fork is probably cheaper to manufacture, the aero difference was one second for 112 miles or something.
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Old 11-09-14, 05:48 PM
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Someone help me out. What is the "stack" of a frame? In the olden times stack height was a measurement of the headset, but now that's mostly irrelevant.
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Old 11-09-14, 06:05 PM
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Originally Posted by BoSoxYacht
Someone help me out. What is the "stack" of a frame? In the olden times stack height was a measurement of the headset, but now that's mostly irrelevant.
Stack is just the height of the front of the bike. It's what you believe it to be. Height of the headtube, headset, fork tube. You're not wrong.

Since fork length is standardized, I take it means Cervelo added more height to the top of the headtube, adding stack.

Originally Posted by Sullalto
Yeah the 2/3 across all cervelo lines is the same frame, cheaper fork and components. And yes, the new S5 has a lower stack.

edit: fork wise, somebody on slow twitch measured the p2/p3 fork and while the p2 fork is probably cheaper to manufacture, the aero difference was one second for 112 miles or something.
For all Cervelo's talk, I bet for majority of the riders who ride their bikes, they save about that when riding a S5 aero carbon bike or a Giant Defy Endurance AL. I bet even for Cat 1 racers, they would place exactly the same and do just as well on a heavier and less aero Specialized Allez. For all Cervelo's hilarious to watch marketing of their bikes in wind tunnels and explanation of how special their custom tapering of fork tubes are, and how special their BBright, is, when it's an unremarkable BB30 press fit with asymetrical width is, it makes no difference to all but the top 1-5% of elite genetically gifted cyclists.

And I would bet, ironically, 90+ % of Cervelo employees wouldn't be able to take advantage of their marketing jargon either. Buy our bikes. It's the most aero road bike and is almost as compliant as our R5 but we ourselves can't take advantage of it because we're not elite genetically gifts cyclists either. Hahahahaha.

It's a sexy bike for sure, and happy for anyone who buys one and it enhances their enjoyment of cycling or competing. But Cervelo's marketing is the most pathetic, dubious, and hilarious of any brand right now. That's where they rank #1 for me, the dumbest, ludicrous marketing.

Last edited by zymphad; 11-09-14 at 06:18 PM.
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Old 11-09-14, 06:25 PM
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Just for fun, why Cervelo has the most pathetic, and hilarious marketing.

We know more about carbon than anyone. Except Cervelo doesn't manufacture any carbon. None. They don't manufacture the resin either. Forming carbon into airfoil shapes isn't special, everyone does it... Aero industry has been doing this longer and better than any cycling company has. And their **** actually matters, their expertise carries millions, billions of people around the world over oceans...

BBright has made the bottom bracket % stiffer and % lighter. But we're not going to tell you how stiff it is or how light it is. And certainly not going to tell you stiff the previous years was or how light previous years was. Nor are we going to tell you whether a cyclist could even flex the bottom bracket last year to make this increase in stiffness matter even a smidgen...

Our frame is % more aerodynamic. But we're not going to tell you how more aerodynamic it is with a human being on it. When the human being accounts for 85% of aero issues, the 5% more aero frame is going to matter how much when a person gets on it? None? Yeah? I dunno, Cervelo certainly will never tell me. 5% more aero frame is what percentage more aero with a human on last years frame compared to this years? It's a mystery, but I'm supposed to have an amazed and shocked look on my face, OMG frame is 5% more aero.

We're proud to publish BBright as an open standard. Good for you Cervelo, press fit BB30 was an open standard already. Thank you.

Our engineers sweated and stressed over the custom tapering of our fork tubes to maximize strength, stiffness, weight and aero. Good for you Cervelo, every company on the planet that makes tapered head tubes did the same thing. How special.

Last edited by zymphad; 11-09-14 at 06:28 PM.
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Old 11-09-14, 07:00 PM
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How is that different from headtube length?
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Old 11-09-14, 07:07 PM
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Originally Posted by BoSoxYacht
How is that different from headtube length?
it's sexier
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Old 11-09-14, 07:43 PM
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Originally Posted by bt
it's sexier
So it's just what the kids are calling it these days? Got it.
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Old 11-09-14, 07:50 PM
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In Cervelo's defense, they do publish white papers, which have drag numbers. If you can't do the math, that's not their fault. Independent tests do show they do tend to make among the most aero bikes as well.

I still think that their marketing is overblown, but I think that most people don't understand aero and can't do math either. So if your schtick is engineering, you gotta be over the top. It kinda evens out imo.

I think most people have more fitness fruit to pick before they worry overmuch about the frame drag as well. Though technically, aero helps slow people too.
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Old 11-09-14, 08:04 PM
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Originally Posted by Sullalto
In Cervelo's defense, they do publish white papers, which have drag numbers. If you can't do the math, that's not their fault. Independent tests do show they do tend to make among the most aero bikes as well.

I still think that their marketing is overblown, but I think that most people don't understand aero and can't do math either. So if your schtick is engineering, you gotta be over the top. It kinda evens out imo.

I think most people have more fitness fruit to pick before they worry overmuch about the frame drag as well. Though technically, aero helps slow people too.
i don't like the way they try to claim that being aero helps slow riders more than fast riders, because it "saves more time" for the slower rider.
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Old 11-09-14, 08:06 PM
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Originally Posted by Sullalto
In Cervelo's defense, they do publish white papers, which have drag numbers. If you can't do the math, that's not their fault. Independent tests do show they do tend to make among the most aero bikes as well.
They do not. They do not tell me how much drag it saves with an actual real cyclist on their bike. Not someone from the peloton who is genetically gifted to ride 200km at 30 mph. I couldn't care less what a bike does in a wind tunnel. I face headwind not even half my ride. I have cross winds as often as I have headwind. I bet Cervelo S5 is super awesome with cross winds. Definitley will shave 5 minutes off my next ride, right?

Oh it's not their problem if customer can't do the math? Seriously? Hey idiot customer, come here. Our frame is 9% stiffer than the previous model. Oh you want to know what that means. Go F yourself. Here is the whitepaper, if you can't do the math and understand how that translates to your cycling experience on this, go F yourself, not our problem.

Now F you, gimme $3000 for the bike you don't understand how the numbers our marketing department has been spewing all over your face means.

Last edited by zymphad; 11-09-14 at 08:15 PM.
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Old 11-09-14, 09:33 PM
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Originally Posted by mattwilkinson
Thats strange, That was off the Cervelo website when on the S2 page.
Apparently this one would be correct...
https://www.cervelo.com/media/docs/S2...6ae2a355-0.pdf
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Old 11-09-14, 09:38 PM
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Originally Posted by BoSoxYacht
How is that different from headtube length?
Look at the geometry chart in the first post. It shows what the stack measurement is. Some more info from Cervelo on stack and reach:

Bike Geometry, Sizing and Fit - Cervélo
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Old 11-09-14, 10:07 PM
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Originally Posted by Dunbar
Look at the geometry chart in the first post. It shows what the stack measurement is. Some more info from Cervelo on stack and reach:

Bike Geometry, Sizing and Fit - Cervélo
thanks for that link. I don't recall other manufacturers using this, but I haven't shopped for a frameset in many years.
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