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Setup for Cycleops/SportCrafters rollers?
Posted: Tue Jan 20, 2009 9:08 pm
by jim_s
No, I'm not conducting a survey of roller setups...
A friend has the TruTrainer, and I've just acquired a Cycleops Aluminum w/ resistance unit (Cycleops-branded version of the SportCrafters ZRO unit) - anyone have power curve data and/or iBike trainer params for the Cycleops Alu or the SportCrafters ZRO, preferrably w/ the resistance unit?
Appreciate it!
Re: Setup for Cycleops/SportCrafters rollers?
Posted: Sun Feb 08, 2009 10:50 am
by jim_s
btw, I stumbled upon the following information in a review of rollers on fixedgearfever.com (
http://www.fixedgearfever.com/modules.p ... stance.htm). Sad thing is, I'd read various parts of the reviews in the past, but had never come across the page w/ the power numbers.
Anyway, not sure how accurate these folks' observations were, but its a potential starting point for anyone w/ some of the listed rollers. (Elite, InsideRide, Kreitler, SportCrafter, TruTrainer, ZZZing) Just on a sanity-check level, their readings for Kreitler poly-lites (3" drum) and SportCrafter ZROs (3.25" drum) are similar, so I take that as a good sign.
Based on their observations, the iBike trainer coefficients for the SportCrafters ZRO's in resistance settings 0 and 5 are:
setting 0
A=360
B=-41.83333333
C=2.1
D=-0.026666667
setting 5
A=480
B=-57.5
C=3.1
D=-0.04
Re: Setup for Cycleops/SportCrafters rollers?
Posted: Mon Aug 31, 2009 4:31 am
by MdC
I do not think the values mentioned are correct.
I plotted the wattage on the fixedgearfever site in excel and came up with:
Full resistance (units set to English) -
A = 0.1256
B = 10.682
C = -0.0096
D = 0.0057
No resistance (units set to English) -
A = 0.0942
B = 9.3032
C = -0.2322
D = 0.0076
The graphs for these rollers look reasonable to me. Am happy to be corrected as I'm better on the bike that I am with the numbers.