About this 3D model

This is a robot wheel made to fit one of those "cause of the week" wrist bands, and generated with the Highly Configurable Wheel (One Wheel To Rule Them All) at http://www.thingiverse.com/thing:21486. Credit for the idea of using one of those wristbands (which I think was a fantastic idea and seems to provide excellent traction) goes to AUGuru. I just tweaked some of the settings and printed it. Unfortunately, I forgot to hit Ctrl-S before I closed down OpenSCAD after exporting the STL, so I don't know exactly what settings I used, but the wheel diameter measures 68mm and I used a 6-spoke diamond pattern with concavity and the "slots" option for tread. It was modeled for a 4mm motor shaft and a 3mm set screw. The print quality here is not very good, and I think I'll have to use an M2.5 because I can't drill out the set screw hole, but other than that the tire holds very well and the traction is excellent.