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MTB Geometry Question

Old 12-16-12, 04:20 PM
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Sprayman
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MTB Geometry Question

Hello;
I'm sure this question has been asked before, so please indulge and forgive a MTB ignoramus:

I was looking at two mountain bikes yesterday locked-up side-by-side. One had a top tube that was much more slanted than the other. In other words, Bike A had a top tube that was almost flat, while Bike B had a top tube that angled downwards toward the seat tube. Why such a radical difference?

Thanks
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Old 12-16-12, 05:01 PM
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Originally Posted by Sprayman View Post
Hello;
I'm sure this question has been asked before, so please indulge and forgive a MTB ignoramus:

I was looking at two mountain bikes yesterday locked-up side-by-side. One had a top tube that was much more slanted than the other. In other words, Bike A had a top tube that was almost flat, while Bike B had a top tube that angled downwards toward the seat tube. Why such a radical difference?

Thanks
Design...that's it.

You'll prob find the stack and reach were similar but one manufacturer chose to slant the TT more than the other cos they reckon it looks cooler.
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Old 12-16-12, 05:25 PM
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Originally Posted by Lexi01 View Post
Design...that's it.

You'll prob find the stack and reach were similar but one manufacturer chose to slant the TT more than the other cos they reckon it looks cooler.
Looks are important but it's definitely cooler not to rack your nuts on a tall top tube. Sloping top tubes generally make a frame stiffer and lighter than its horizontal top tube counterparts.
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Old 12-16-12, 05:56 PM
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Originally Posted by cryptid01 View Post
Looks are important but it's definitely cooler not to rack your nuts on a tall top tube. Sloping top tubes generally make a frame stiffer and lighter than its horizontal top tube counterparts.

Interesting point. I'm glad the MTB companies are looking out for my boys.
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Old 12-16-12, 10:46 PM
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The one with the lower TT will fit more riders, in particular those with shorter legs relative to their torso and arms.

But if you aren't proportionally short in the legs, you should find that you have plenty of standover on either frame style.
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