For the hpi wr8 rims, only the wr8 tires will fit. The off road rims have a slightly wider width and only the off road tyres fit them. The tarmac and gymkhana tyres will fit the gymkhana rims. The onroaf rims are 1.9 and the offroads are 2.2. I'm sure there are other tyres that will fit them rims, but I haven't tried any others. These are some of the tyres that will fit. https://www.modelsport.co.uk/tyres/rc-car-categories/9960/996010&ManufacturerID=18&MSAttributeID%5B58%5D=973?products%5Bquery%5D=hli%20wr8%20tires%20 Sent from my SM-G986B using Tapatalk