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Old 12-12-11, 08:12 PM
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roomservicetaco
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Originally Posted by Bomccorkle
Sorry to harp but does anyone have a set of rollers that they can measure the distance(center to center) of the rear rollers and the rear roller to the various adjustment holes for the front roller?? I would like to make the thing adjustable so that just about any bike could use it. I suppose if anyone had a quick answer as to the range of wheelbases on bikes that'd be swell too
From my set of Sportcrafter rollers:

11" c-c between rear rollers
32.5" c-c between front roller and middle roller, with holes at +1" increments thereafter (33.5, 34.5, etc.). You are supposed to set up the front roller such that the bike's front axle is exactly on top of or slightly behind the axle of the front roller. One thought is that you could custom size the frame to the wheelbase of your bike.

Smaller rollers = more resistance. Standard sizes seem to be either 4.5" or 3.25/3.0" (see www.kreitler.com or http://www.sportcrafters.com/ for example). IMO, neither size gives enough resistance for a workout unless you spin at very high cadences (125+). I have not tried the 2.25" that Kreitler sells but their wattage chart looks like it would provide good resistance at typical road speeds (http://www.mountainracingproducts.co...tage_chart.pdf).

Guess what I'm saying is that if you turn your rollers to the larger sizes, be prepared to add a fan, mag, or fluid resistance unit to it. Or, turn the rollers to 2.25" or less.
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