Wheel rubbers??? As in the tyre spinning on the wheel hub??? I just bang 2 screws in opposite each other, the heads are behind the cap so you cant see it.
The plastic is not very porous and flexable so glue needs to be able to handle that. Plastic is also 'oily' Well unless its seen a lot of sun, then its chalky.
Find a motorbike forum for old dirt bikes. Some of what you can do is amazing, plenty of elbow grease and time and what was chalky and horrid can be shiny and new again (just a little thinner so not as strong). Theres some good threads on the
http://www.yamahait.com.au/ forum.