A year ago, I purchased some Velocity 650B rims and 40mm-wide Panaracer Fatty Rumpkin tires. The intention was to convert my fixed-gear Pacer (built with Karate Monkey dropouts) to a 650B bike. Well, that never happened. And I'm glad it didn't, because my geared blue Pacer is better suited to use the 650B format. The Pacer fork doesn't accept 40mm-wide tires, so I swapped it with a Steamroller fork. The axle-to-crown height of the Steamer fork is 3mm taller, and the offset decreases by 7mm. The trail measurement changes a bit, but the resulting geometry (61mm of trail) feels just…