Inline Skate Axle Bushing

Needed to replace the bearings (608zz) in my kids' inline skates and the plastic bushings between the axles and bearing inner race were worn out, so I printed new ones. They appeared to be standard between different brands of skates that my kids have. I used ABS, but I bet something like nylon would be even more durable. The model has slightly oversized holes to allow the axles to slide in after shrinkage. Finished product dimensions are in the images: 6.5mm ID, 7.9mm minor OD, 11.7mm major