I believe Renault did for the cup series but only that series, i'm not 100% though
right...cup wheels are 5,5J 13"spare wheels are 5J 13"both michelin
Quote from: "Ruske"right...cup wheels are 5,5J 13"spare wheels are 5J 13"both michelinOffsets are different too, spare is et35 and cup rim is et16
No idea why they done it for the cup cars, maybe done to help the car handle little better due to the slightly wider track.