Inserts work like air in a real tyre. Changing the insert is like changing the pressure. I've seen other advice on here to stay away from playing with that till you've got your setup right and can feel tiny differences in it. I personally just use pre mounts. Sorex and sweep are good. The tyres have different compounds too, just like foams the higher the number the harder the compound. Surface type and temperature dictates what tyre to use. And you'll be able to tell when they are worn.
Supporting Aussie hobby shops:
- www.MRJRacing.com.au - - www.feralbatteries.com.au - - www.actionrc.com.au -