Rack Adapter for Bicycle Seatpost Taillight

thingiverse

This is for relocating a seatpost-mount taillight to your bicycle's cargo rack. The adapter clips securely onto your rack's 10mm tubing and approximates the diameter and angle of a 27mm seatpost, so your taillight's beam pattern projects at the angle that the manufacturer intended. Frees up seatpost room for a seat bag and allows the cargo rack to be piled high without obscuring the taillight. An additional advantage is that it moves the taillight out of line with the rear wheel so it is less likely to become covered by mud or dirt. I know that I could have just bought a flat-mount taillight, but this adapter was preferable to spending eighty bucks and having my seatpost light sit around unused.