I swapped on a 120/70r-17 front and 150/60r-17 rear Conti Force Supermoto tires. I use these on my KTM 530 when it gets the 17" sumoto wheels and they are tuff, warm up fast and get really sticky. No clearance problems at either end. I run the 150 on a 4-1/4" rear wheel on the KTM and the 300 has a 4" wheel. There looks to be room for a 160 but I know they are better on a 5" wheel. The 1/4" with the 150 tire doesn't concern me at all. Going up to a 160 is probably OK, but I'd hate to have it mess with the feel of the bike as it is now.

http://www.rockymoun...Motorcycle-Tire

Rocky Mountain had good shipped prices and I had a little credit/points $$$ to burn too. Good place to deal with.

http://173.74.246.28/ktmtalk/photogallery/galleries/members/300_150_tire.jpg

Pointless to go to a 160, 150 has plenty of sticky options

But the kiddies need their snazzy shoes! It would be for looks alone, I agree.

Some dude put a 180 on his 250. I'd do it just to make more experienced people go, nah thats not a 250, well wait, only 1 disc in the front, but a 180 rear? DAFUQ AM I LOOKING AT

I thought the 120 front might slow the steering down but if it has I don't notice it after 600 miles on the 120. It might have just a tick. They have been getting warm despite temps in the low 30s and salty roads in NJ.

I'm waiting for someone to run "stretched" tires, like a 110 out back! :eek:

I ran a 90 slick up front, cray-cray fast on the turn-in, DOT 140 Bridgestone on the rear, much fun.
http://www.caliphotography.com/photos/index.php?do=photocart&action=favs#image=2519762