Fairwheel Crank Test
Moderator: robbosmans
Fairwheel have published their latest crank test . As usual it provides some interesting reading
http://fairwheelbikes.com/c/reviews-and ... k-testing/
http://fairwheelbikes.com/c/reviews-and ... k-testing/
Ozrider - Western Australia
Parlee Z5 XL (6055g/13.32lbs) Trek Madone 5.9 (7052-7500g)Jonesman Columbus Spirit (8680g)
Chase your dreams - it's only impossible until it's done
Parlee Z5 XL (6055g/13.32lbs) Trek Madone 5.9 (7052-7500g)Jonesman Columbus Spirit (8680g)
Chase your dreams - it's only impossible until it's done
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I agree, great comparison. One caveat: why was the BB30 version of the Sram RED 22 Exogram not tested? Since it has a bigger axle and a lower weight, its results should be even more favorable, especially STW-wise.
“I always find it amazing that a material can actually sell a product when it’s really the engineering that creates and dictates how well that material will behave or perform.” — Chuck Teixeira
mythical wrote:I agree, great comparison. One caveat: why was the BB30 version of the Sram RED 22 Exogram not tested? Since it has a bigger axle and a lower weight, its results should be even more favorable, especially STW-wise.
For the first round of testing we targeted cranks with nearly universal fit, we wanted to test the cranks that would fit almost any bike, bsa, italian, bb30, pf30, bb86 etc... The Sram crank fits only bb30/pf30, the same as the SISL, which we felt wasn't quite a level playing field. We'll be doing a test of bb30/pf30 specific cranks soon.
Compliments to madcow for the great stuff as usual!
madcow wrote:mythical wrote:I agree, great comparison. One caveat: why was the BB30 version of the Sram RED 22 Exogram not tested? Since it has a bigger axle and a lower weight, its results should be even more favorable, especially STW-wise.
For the first round of testing we targeted cranks with nearly universal fit, we wanted to test the cranks that would fit almost any bike, bsa, italian, bb30, pf30, bb86 etc... The Sram crank fits only bb30/pf30, the same as the SISL, which we felt wasn't quite a level playing field. We'll be doing a test of bb30/pf30 specific cranks soon.
I look forward to the BB30 test. I have a BB30 frame, so it's not really fair to compare the SRAM GXP crank when I would use the BB30 version.
Nice review/comparison. Although as an engineer, I found the strain energy analysis a lot more interesting. Theoretically, almost all of the energy stored in the cranks will be returned to the drivetrain. The only time I think stiffness is actually a real benefit is for very hard efforts and sprinting, which happens a lot in road racing. However, I don't think stiffness is really a big deal for something like a time trial bike.
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Itsacarr, the S-Works crank should be very similar to the Lightning crank...IIRC, Specialized licenses the design from Lightning. That said, any differences would be really interesting, especially if they implied a different layup. The Hirth joints in both cranks should be similarly stiff, so I expect that wouldn't be a factor in any stiffness delta between the Lightning and S-Works cranks.
Cheers,
Jason
Cheers,
Jason