This is how we do it, folks. Props to our CNC guy for getting these things made out of solid aluminum.
That’s great, but what am I looking at?
This is a cutaway view of one of the frame members on our drive train. As you can see, there are four 'blocks." The large hole in the center of each block is where the bearing gets mounted, and hence the axle and wheel. The unique system here is that, by using the yellow allen wrench, we can actually move these blocks laterally. This is useful for un-tensioning the chain if a wheel needs replacement: just slide the wrench in, give it two turns, and you’re good to go. Pretty cool, huh?