BMX Foot pegs

thingiverse

My son really wanted foot pegs for his BMX bike. The correct diameter to fit on the wheel axle wasn't available at the shop, so I designed it myself. I printed it with polycarbonate, and it turned out pretty flashy-looking. There are two sizes: one with a 13mm center hole for the rear axle and another with an 8.9mm center hole for the front axle. Since the axle threads are extremely fine, I didn't design any threads into the pegs - instead, you'll need to "force" the peg onto the axle, creating your own thread in the process (a little grease can help). Of course, you'll need two of each size. In Simplify3D, I set up three different processes for printing: for the first 20mm of height, I used 100% infill and 10 perimeters to create a super-strong shell around the axle; from 20 to 100mm, I went with 70% infill and 10 perimeters; and finally, above 100mm, where the nut is located, I did 100% infill and 10 perimeters. It seems strong enough that I can jump on the pegs without any issues (I weigh around 140 pounds). I printed it with no supports but a good raft (two layers) to prevent warping of the polycarbonate. Print settings: Felix Pro 1 printer, raft enabled, no supports, resolution at 0.2mm, and infill set to 100% for most of the volume.