Yes losi 22 wheels and springs fit along with alot of other parts, caster blocks, hinge pins (see my mod thread) rear hubs, steering hubs.
The car is great, be interesing to try the plastic RTR chassis on the dirt for the added flex, only £14.99 so worth a go for that.
As for set ups check CML - These are uk mid motor set ups for med/high grip:
http://www.cmldistribution.co.uk/tea...ter=0000007127
Petit site, keep an eye on this for clay set ups I reckon or have an ask on rctech as there is a thread on the car there:
http://www.petitrc.com/setup/hobao/S...aoHyperH2.html