Do different bike companies use different size frames?
08-24-12, 12:54 PM
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Do different bike companies use different size frames?
I'm 5'8.75" or 5'9" and figured out that I'd probably need ~55cm frame.
The bike I'm looking at on bikesdirect shows this:
XSmall -- 43cm -- 4' 11 up to 5' 2"
Small -- 46.5cm -- 5' 3" up to 5' 6"
Medium -- 50cm -- 5' 7" up to 5' 9"
MedLarge -- 53.5cm -- 5' 10" up to 5' 11"
Large -- 55.5cm -- 6' up to 6' 2"
XLarge -- 58.5cm -- 6' 3" up to 6' 7"
"These size just like Trek and Fuji road bikes - center of bb to top of seat tube"
The bike I'm looking at on bikesdirect shows this:
XSmall -- 43cm -- 4' 11 up to 5' 2"
Small -- 46.5cm -- 5' 3" up to 5' 6"
Medium -- 50cm -- 5' 7" up to 5' 9"
MedLarge -- 53.5cm -- 5' 10" up to 5' 11"
Large -- 55.5cm -- 6' up to 6' 2"
XLarge -- 58.5cm -- 6' 3" up to 6' 7"
"These size just like Trek and Fuji road bikes - center of bb to top of seat tube"
Last edited by That70sShowDude; 08-24-12 at 12:57 PM.
08-24-12, 02:20 PM
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1. Top tube length matters most, perhaps followed by head-tube length with minor adjustments based on the angles involved. You can always get a longer seat post with more or less set back, although there are limits to stem length and height.
2. There's too much variation in people to make predictions based on height. I'm 5'10", my wife is 5'4", and used to appropriate my pants without them dragging on the ground.
5'10, 55cm seat tube, 55.5cm top tube, 120mm -17 degree stem. I could not buy a long enough stem to make two sizes smaller fit, and one size smaller would be marginal.
Looking at some of the on-line fit calculators would be a fine idea.
2. There's too much variation in people to make predictions based on height. I'm 5'10", my wife is 5'4", and used to appropriate my pants without them dragging on the ground.
5'10, 55cm seat tube, 55.5cm top tube, 120mm -17 degree stem. I could not buy a long enough stem to make two sizes smaller fit, and one size smaller would be marginal.
Looking at some of the on-line fit calculators would be a fine idea.
08-24-12, 02:38 PM
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1. Top tube length matters most, perhaps followed by head-tube length with minor adjustments based on the angles involved. You can always get a longer seat post with more or less set back, although there are limits to stem length and height.
2. There's too much variation in people to make predictions based on height. I'm 5'10", my wife is 5'4", and used to appropriate my pants without them dragging on the ground.
5'10, 55cm seat tube, 55.5cm top tube, 120mm -17 degree stem. I could not buy a long enough stem to make two sizes smaller fit, and one size smaller would be marginal.
Looking at some of the on-line fit calculators would be a fine idea.
2. There's too much variation in people to make predictions based on height. I'm 5'10", my wife is 5'4", and used to appropriate my pants without them dragging on the ground.
5'10, 55cm seat tube, 55.5cm top tube, 120mm -17 degree stem. I could not buy a long enough stem to make two sizes smaller fit, and one size smaller would be marginal.
Looking at some of the on-line fit calculators would be a fine idea.
Last edited by That70sShowDude; 08-24-12 at 03:34 PM.
08-24-12, 04:28 PM
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I looked at a ton of online sizing and things that people have said. This chart that they give says I should be 6'2"ish w/ the frame I need. To go w/ my real size, I'd need a frame size of 50? I've never seen anyone anywhere get one that small for this height. Is the chart off or something. Which size would you recommend? 53.5cm?
https://www.competitivecyclist.com/za...LCULATOR_INTRO
and see how things will work with the specific frame geometry.
08-24-12, 04:35 PM
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Frame size is a fiction. And the competitive cyclist fit calculator is nearly worthless. Find someone competent locally to help you. OTOH, you can take a crap shoot with various on-line guesses and you might get lucky.
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08-24-12, 04:54 PM
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I'm just under 5'10" and my custom frame has a 53mm top tube, and my Lynskey R230 is a size medium. Both fit me like a glove. Had a "54" Spec Tarmac and it always felt a smidge big.
08-24-12, 06:58 PM
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Originally Posted by That70sShowDude;14648189
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These size just like Trek and Fuji road bikes - center of bb to top of seat tube"[/COLOR]
08-24-12, 07:29 PM
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For example, I ride a M/l (medium large) in a giant, but an XL in a Wilier.
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