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Old 03-04-14, 11:31 AM   #1
vinuneuro
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Small geomtery differences: all else equal

The 06 models are a bit cheaper than the 07-10, probably because they were a bit cheaper when new. The biggest difference is the frame materials and I'm wondering how much of a difference and premium that's worth. There are also some geometry differences and I'm wondering how differently the two frames will handle, since I can't ride either before purchase. The components are almost completely identical between the two. I have an 07 Sport now which is neither here nor there in terms of geometry and material. The 06 I'm looking at is a good $300 cheaper.

06: A1 tubing, carbon fork with aluminum steerer.

07-10: E5 tubing, all carbon fork, carbon rear stays.

Geometry differences (other measurements are same),

06 vs 07-10

Wheelbase: 1037mm vs 1032mm
Trail: 61mm vs 64mm (head-tube angle 72.5 vs 72)
Chain-stay length: 450mm vs 440mm
Front-Center: 597mm vs 601mm

The longer chain-stays and wheelbase on the 06 indicate to me a slightly more stable ride, but the lower trail ad front-center indicate the opposite.

Last edited by vinuneuro; 03-04-14 at 11:37 AM.
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Old 03-04-14, 11:58 AM   #2
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IME, these kinds of very small differences are beyond the ability of even highly experienced riders to feel any difference. Throw away the tape measure and buy based on more meaningful differences, or toss a coin.
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Old 03-04-14, 01:21 PM   #3
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Quote:
Originally Posted by vinuneuro View Post
The longer chain-stays and wheelbase on the 06 indicate to me a slightly more stable ride, but the lower trail ad front-center indicate the opposite.
Maybe that was the point, to increase the wheelbase without sacrificing the existing handling characteristics. Hence the changes are offsetting.
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Old 03-04-14, 01:23 PM   #4
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I'm guessing that the 7 - 10 is significantly lighter. I would probably choose it.
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Old 03-04-14, 01:25 PM   #5
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I'm guessing that the 7 - 10 is significantly lighter. I would probably choose it.
That seems right. Also explains the price differential after '06.
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Old 03-04-14, 04:24 PM   #6
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Quote:
Originally Posted by vinuneuro View Post
06 vs 07-10

Wheelbase: 1037mm vs 1032mm
Trail: 61mm vs 64mm (head-tube angle 72.5 vs 72)
Chain-stay length: 450mm vs 440mm

The longer chain-stays and wheelbase on the 06 indicate to me a slightly more stable ride, but the lower trail ad front-center indicate the opposite.
While the differences you describe are very slight, and unlikely to be noticeable even by experienced riders, it's worth noting that more trail doesn't necessarily mean more stable steering. Jan Heine of Bicycle Quarterly has started riding "mid-trail" bikes (discovered by accident, based on old French randonneering bikes). If I get a custom bike, I'll probably have around 45mm trail.

http://janheine.wordpress.com/2011/0...-end-geometry/
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