Cheers Craig, hadn't got round to asking the question myself!
I've been looking at existing wheels with the toolmaker/moulder I know and we suspected they are a nylon material, but as Nellybobs said, there are many mixes of Nylon!
Super glue bottles are made from a nylon blend I believe (I could also be wrong but I'm sure that's what I'd heard too???) hence the interest in getting the right blend if we do go for a nylon!
The suppliers I've asked don't know about rc car parts, but asking them for a blend that will take superglue should be easy enough, so I'll def give that a go.
We also wanted to find out what grades are used that cope with the punishment of RC cars too...and that's something the suppliers don't really know about! Getting 1000's of wheels made that disintegrate at the first sight of an impact would also be bad
So any thoughts from those in the know would be gratefully received