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Matching road bike to myself...

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Matching road bike to myself...

Old 07-31-09, 02:42 AM
  #1  
Copter2
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Matching road bike to myself...

Hi.

I am about 5,11 - 6.0 feet (178-180cm) give or take.

I'm mostly interested in take the new Trek 1.5: http://www.trekbikes.com/us/en/bikes/road/1_series/15/.


Now I'm really not sure which size should I take? Mostly everyone is telling me to take 56" including the store owner but when taking a ride on them I feel the handlebars is a bit far away from me. So they say I should shorten the stem about 2-3cm maybe.

If I have to shorten the stem why not just take size 54"? They will be lighter as well too right?

What should I do ?

Thanks!
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Old 07-31-09, 02:57 AM
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Listen to the shop guy.
The 54cm is way too small. At your height, some would even choose the 58.
The 54 cm frame top tube is too short, the headtube and the seat tube will be lower.
You'd have to extend the seatpost and put more spacers under the stem to get the bars and seat at the right height.
Get the bike with the shorter stem. You'll likely want to swap back to the longer one once you get some miles under you and get more comfortable. At that point, the 54cm would be getting ridiculous.
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Old 07-31-09, 03:55 AM
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Originally Posted by Metzinger View Post
Listen to the shop guy.
The 54cm is way too small. At your height, some would even choose the 58.
The 54 cm frame top tube is too short, the headtube and the seat tube will be lower.
You'd have to extend the seatpost and put more spacers under the stem to get the bars and seat at the right height.
Get the bike with the shorter stem. You'll likely want to swap back to the longer one once you get some miles under you and get more comfortable. At that point, the 54cm would be getting ridiculous.
I'm the same height and prefer a 54cm to 56cm. It comes down to body proportions.

I suggest the OP get the shop to swap out the stem and give it a test ride if they will.
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Old 07-31-09, 04:23 AM
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I am the same height and ride a 56. I use a 90 stem. I have ridden everything from a 54 to a 58. I like the shorter top tube on a 54 but can't get the handlebars to the correct height. I think that your bike shop is probably steering you in the right direction.
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Old 07-31-09, 05:35 AM
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56 atleast. as you start riding and becoming more comfortable you will stretch out and the 54 will be way to small.
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Old 07-31-09, 07:53 AM
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Wow, with 6' tall guys riding 54 inch frames, the 60" + frames must be engineered to NBA type 7+ footers! Guess at 5'7" I should be riding a 47-48" frame instead of the 54 inche i am comfortable on!

Probably some other "factors" at play here.
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Old 07-31-09, 08:11 AM
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Consult your nearest witch doctor and have him roll some chicken bones, then spend 5 days in a sweat tent until you find your kindred animal spirit. If the size they recommend isn't the same, take the median.

In case you haven't noticed, sizing isn't cut and dry and is very individual. Lots of body dimensions are taken into account, not just overall height and inseam. Let a competent LBS fit you. If you really want a warm and fuzzy, get fitted at a second shop.

If you just want to wing it and do it on your own or as a sanity check to your LBS fit, check out an online fit calculator:
http://www.competitivecyclist.com/za...LCULATOR_INTRO
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Old 07-31-09, 08:33 AM
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Trust the LBS. They know more than you do.

BTW, it's a 56 CM, not 56".

And each manufacturer's 56cm is actually a different size. Sort of like how different shoe companies "size 11" aren't the same, only more so.

The important dimensions are the top tube length and head tube length, not the seat tube length. The top tube length needs to be matched to the length of your torso and arms. If you have long legs for your height, you want a frame with a shorter top tube. That may be a smaller size, but then the head tube will be shorter, which requires more spacers to get the bars high enough. There is a limit on how many spacers can be used (usually 4cm on carbon steerer tubes).

Finally it is likely that some of the "too stretched out" feeling is simply because you are not used to road bikes. It's common for new road riders to use a shorter stem for a while until they are used to bending from the waist.
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Old 07-31-09, 08:40 AM
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I"m your height and ride the same bike you're looking at. Mine's a 56. I test rode a 54, and while it worked, I could tell the difference, and it did feel more cramped.
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Old 07-31-09, 09:10 AM
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I'd fit the bike to your legs and not your arms. A stem is easier to change than the effective seta tube angle. If you have long legs, get the 56 and a shorter stem. If you have short legs, get the 54.
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Old 07-31-09, 09:48 AM
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I did a study recently of what size frames people use.

For a person 5'11" in height, the average of frame sizes is 56.4 cm. A few ride 58 cm, the majority ride 54 cm, but I haven't seen anyone 5'11" on a 54. Complete results:

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Old 07-31-09, 10:02 AM
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I am 6' and have a 31" inseam and ride a 56 (2005 Trek 1200). I almost think I should have gotten the 58. Definitely not a 54.
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Old 07-31-09, 10:50 AM
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When I got fitted for my bike the lbs put me in a 54cm and I am 6'1". He told I have a large torso, and I forget what my inseam was, but if the lbs told you a 56cm then I would listen to him. Although I am a noob, and my experience is limited.
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Old 07-31-09, 11:49 AM
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Originally Posted by terrymorse View Post
For a person 5'11" in height, the average of frame sizes is 56.4 cm. A few ride 58 cm, the majority ride 54 cm, but I haven't seen anyone 5'11" on a 54. Complete results:
???

If my bike came in even sizes, I would prefer to go down to 54, but despite being 5'11" I have the legs of a 5'8" person.
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Old 07-31-09, 02:16 PM
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Originally Posted by jsharr View Post
I am 6' and have a 31" inseam and ride a 56 (2005 Trek 1200). I almost think I should have gotten the 58. Definitely not a 54.
Is that pants inseam or a method like Competitive Cyclist?
I'm 5'11", my pants inseam is 31.5", my inseam via the CC method is 33".

So for S & G's, I did the fit measurements as per the website and plugged them into the CC calculator. Even with cut and dry body measurements they give three different sizes following different "fit styles": The Competitive Fit, The Eddy (Merckx) Fit, and The French Fit. I should be on either a 54cm, 56cm, or 58cm, respectively.
My spirit animal (a ring-tailed lemur) told me to get a 54cm Felt.
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Old 07-31-09, 02:47 PM
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I'm 5'10" and I ride a 60cm with a 130mm stem. The reach right now is the only issue and I'm shortening the stem to a 110mm. Other than that it's perfect.
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Old 07-31-09, 03:47 PM
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Originally Posted by Cycho View Post
I'm 5'10" and I ride a 60cm with a 130mm stem. The reach right now is the only issue and I'm shortening the stem to a 110mm. Other than that it's perfect.
Pretty close to the same height as you.......... No way could I even comprehend riding a 60. My Giant is a Medium(approx 54-55 ish top tube and my touring bike is a 55. Do you have freak long legs? I'm guessing so.
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