Ok, so forget your double-drilled cranks, or even your tripple drilled cranks, I’ve been giving some thought to adjustable on-the-fly cranks recently. I’ve had some ideas, but the best idea I came up with last night was to look at the patents to see if anyone else has beaten me to it.
I wonder if Kris Holm has looked in to making these?
Oh, seriously though, I know its probably an obvious assumption, but the main forces put upon a crank are when the pedals are in the horizantal position right? Decreasing to virtually zero when they’re vertical?
Here’s an idea for a crank plate. It starts at 170mm and goes around in 10mm increments, all the way down to 90mm. Plate would be aluminum, approx 3/8" thick for threading. The black areas are cutouts, and the circles the pedal holes. This one is for a cotterless hub, but I guess you could do a splined one also.
If you did a crank grab with these, you could continue to ride on the crank itself!
