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« on: November 16, 2005, 10:43:24 am »
Are my findings correct? I am giving up on my 30 yr old touring bike, it is becoming a money pit. I am thinking of using my mtn. bike for touring. I have done the "gear ratio" and "gear inches" calculations. I have the same width tires on both bikes (28 mm). To test things out, I put both bikes on the indoor trainer to find out if the longer crank will make-up for the smaller wheel (700cc vs 26 inch). My test was to pedal the bike at a comfortable cadence on both bikes (they both have cadence computers), then compare the RPM and the MPH. The longer crank arm of the mtn. bike 175 vs 170 for the road bike, allowed me to pedal in a higher gear inches at the same cadence (90 RPM) and achieve a greater MPH. I believe I can compensate for the drop handlebars of the road bike with my butterfly handlebars and adding aero bars, on the mtn. bike. Again, does the longer crank make that much difference?