Hi guys just to share with you something that I've tried and it works well. First the track we played is a bumpy track and we have 6 xray nt1 2012 equipped with max power xp 3.9 world edition in our club everyone has the same set up with gear 60 (1st) and 55 (2nd), pignon 16,20 ,side pulley 25. I've shift to side pulley 26 with gear 59,54,pignon 16,21 and have gain displacement in corner exit and on straight line the car is better in corner entry also and I've notice something normally I used 2 rear tyre with 1 front tyre now the tyre wear is the same REALLY the car moves better than the 5 other ones .Does someone experience the same ?