pic: Concept 8wd Drivetrain

[R.C.]

Originally Posted by AndyB

UHMW and HDPE are two very similar materials. They do have differences though. HDPE stands for High Density Polyethylene which is long strands of ethylene monomers. UHMW-PE (Ultra High Molecular Weight Polyethylene) is similar, but has even longer monomers, generally making it stronger with better wear properties. HDPE will hold it's shape a little bit better and some argue that it can be machined easier. UHMW tends to be a bit more expensive than HDPE depending on the scenerio.

Honestly, when it comes to something like a wheel, using one or the other shouldn't make a big difference. It probably comes down to what you can get your hands on easier.

Thanks for clearing that up, I wasn't sure what the difference was. Does anyone know how long those wheels last and nice job on the drawing and I totally agree with Sanddrag.