Hello, I am currently getting into triathlons and need to get myself a TT bike.
I am 173 cm’s high, and my stride length (that’s what it called?) is 83 cm.
I have been riding a scott addict r2 road bike in size 54, which fitted me very well.
However, I hear so much different about sizes, like cannondale advices you to get the same size in TT bikes as in their road bikes. But also I have gotten advices of going 51/52 in TT bikes.
So what sizes would you prefer in these bikes?
I am unable to try a bike as there is no stores in Norway who got them. They have to order them on demand.
OK I’ll bite. Also, not a fit expert, just know the basics, so take my advice for what it’s worth…
Hard to say what fits you without any additional information. If I were you, I would do the following to start to narrow down on sizes:
Read articles on fitting on ST main page. Understand the difference between long/low bike and short/tall. The brands you list fit differently, so you need to find out where you are along the fit continuum.
Try to find an online dealer that has a fit calculator. Not sure of all the ones out there, but competitive cyclist has one, and maybe All3Sports.
Bottom-line you will have to do some homework and develop your knowledge if you want have a good guess as to which fits you best.
The Scott has less reach and more stack than the P2… so if you want an really low position… the P2 would be better.
If you plan to ride either a little less “aggressive” (not really the right word… but…), then it’s personal preference… which do you like, which spec do you want…?
It looks like you have to cut the seatpost to length on some of the Plasmas… a feature I hate as I like to fly with my bike… hard to fit in a bike box.
Okey, now I have come to the conclusion that I just need to get a bike, and 51/52 should fit me. Guess I can fix the other stuff if it’s needed later.
It stands between a Scott Plasma in 52 and cervelo p2c in 51 or 52, what would you reccomend?
Wrong conclusion. The Scott and Cervelo fit differently. Buy the Scott if you need a “taller” bike, buy te Cervelo if you need a shorter. Until you can answer that question, don’t buy either.
Sorry for making so much out of this topic
I did measure on the site you linked and this is the results:
Your Measurements Gender M Inseam 83 cm Trunk 58 cm Forearm 34 cm Arm 66 cm Thigh 60 cm Lower Leg 53 cm Sternal Notch 141 cm Total Body Height 173 cm
this is the reccomended stuff:
The Aero Fit Top Tube Range 52.0 - 54.0 Stem Length Range 8.0 - 10.0 Saddle-Bottom Bracket Position 74.7 Saddle-Pedal Position 91.9 Saddle-Ground Position 99.7 Cranklength 172.5 Aero Bar Size M Saddle-Aero Bar Pad Drop Minimal 5.5 Saddle-Aero Bar Pad Drop Moderate 10.7 Saddle-Aero Bar Pad Drop Intense 13.0 Saddle-Aero Bar Pad Drop Maximal 16.7 Pad-Ground Position Minimal 94.2 Pad-Ground Position Moderate 89.0 Pad-Ground Position Intense 86.7 Pad-Ground Position Maximal 83.0
.
In short, you need to find the stack and reach of the frames that will fit you best. You do this by getting fit by a FIST certified fitter (see link above that says Fitters). This will cost you.
You can forego being educated and just get fit by a FIST certified fitter.
Both option 1 and 2 result in the same outcome. Get fit by a FIST certified fitter.
You will not be able to measure yourself and find the right bike. You will not be able to translate your road bike fit to a tri bike. You may get lucky if you do this but chances are you will waste time and money if you try to do it yourself.
In short, you need to find the stack and reach of the frames that will fit you best. You do this by getting fit by a FIST certified fitter (see link above that says Fitters). This will cost you.
You can forego being educated and just get fit by a FIST certified fitter.
Both option 1 and 2 result in the same outcome. Get fit by a FIST certified fitter.
You will not be able to measure yourself and find the right bike. You will not be able to translate your road bike fit to a tri bike. You may get lucky if you do this but chances are you will waste time and money if you try to do it yourself.
I am your size and have a 51cm P2C which is good for me.
I started off with a road like position on it but after a year got a Retul it and moved forward and lower. Smashed my bike PRs after that.
In short, you need to find the stack and reach of the frames that will fit you best. You do this by getting fit by a FIST certified fitter (see link above that says Fitters). This will cost you.
You can forego being educated and just get fit by a FIST certified fitter.
Both option 1 and 2 result in the same outcome. Get fit by a FIST certified fitter.
You will not be able to measure yourself and find the right bike. You will not be able to translate your road bike fit to a tri bike. You may get lucky if you do this but chances are you will waste time and money if you try to do it yourself.
Understand? Good. So go get fit.
There is no place close to me where I can get “fitted”, but isn’t there any idea based on the information I linked? I did the test for a triathlon specifik bike. I really can’t get to try any bike nearby, so it is a sort of a little gamble as well, I just wanna try to be as safe as I can when I order my bike thanks for all the info
There is no place close to me where I can get “fitted”, but isn’t there any idea based on the information I linked? I did the test for a triathlon specifik bike. I really can’t get to try any bike nearby, so it is a sort of a little gamble as well, I just wanna try to be as safe as I can when I order my bike thanks for all the info
I don’t think most of the responders to this post read that you are in Norway. You’re the same height as me. Provided you do not have weird proportions… the sizes I gave you will be fine.
For reference my seat height is 69cm, and I ride a 52cm Cannondale road bike.(53.5cm tt)
I would ride a
51cm Cannondale Slice
XS Scott Plasma
51cm Cervelo P2
I’m also going to guess you have a fairly short stem on your road bike, maybe 80-90mm… since a 54 seems a bit large for your height.
For what it is worth, I’m about the same height and ride a 54 cm Felt TT bike. Prior to getting a fit, I thought I might ride something smaller, but that’s not what happened. I had to drive an hour and take off work for the fit, but it was worth every penny.
Bullshit. It’s not hard to find the right frame size based on his choices.
From there you:
set your seat height (same as road)
mess with the height and length of the stem to get your reach and drop comfortable.
Done.
That’s absurd. Let’s say you prefer to ride at 78deg of STA. And let’s say his preference is 80deg. That right there is, for someone with ~73-75cm of seat height, is about 2.5cm. Would you be happy if someone just threw a 2cm longer stem on your bike? Maybe. If your stem was already a bit on the short side. But let’s say you bought a bike that was a tad short and already had as long a stem as ought to go on the bike? Now, you’ve got WAY too long a stem on the bike.
Now, further, let’s imagine that his torso is also a bit longer, relative to his overall height, than yours. Now we could be talking about 3, 4, 5cm more reach.
That will help account for your torso/leg proportions. However, it assumes that you WILL ride at ~79deg. Fortunately, this is the middle of the curve where folks ride. So you can go a bit steeper or a bit slacker and be fine with a marginally longer/shorter stem. But best to reference YOUR OWN measurements, as body proportions make a big difference.
