I've been running 2lbs light on both the front and rear. I started with the recommended 36 on the front and 41 on the rear. I didn't see of feel any different on the rear, mostly because I've been riding alone and not maxing the weight limit. I don't not like the front tire. riding with 36, 38, 34 and as low as 30 the front end seems to wash out or have to much side movement on the road. Most of the time when it feels like it is sliding for no other explanation is because of all the road snakes Virginia finds it necessary to put down on the road instead of repairing it correctly. I can't wait for Avon or Metzeler to come out with the correct tires for this bike. I wish they would have just put a 18 on the front.