http://www.twistertiresusa.com/index...products_id=33
These are awesome onroad tires. Sold out at the moment in the USA, but maybe you can find them somewhere in the EU. Loads better than the road rage. Slightly smaller diameter so you will want to gear up a tooth or 2 to compensate, but they stick and handel far better than roadrage tires.
Another good tire is the Losi rally cross tires. A bit harder than the one I listed above so slightly less traction, but still way better than road rages and they seem to last forever.