Upper ideler wheels

[evan3000]

What is the smallest upper idler wheel I can run with my Timbersled Mtn. Tamer?
I am going to replace the ugly stockers and don't have my sled around to measure it.
Thanks

 

[Fuken]

I tried 5" wheels up top and they were too small, the track rubbed the top of the shock. Went back to the ugly solid 7" stockers with the intent of going to the same as my rears sometime in the future:

http://yamaha-motor.ca/products/acc...apparel=1658&accessory=3801&#accessoryApparel

 

[sledskiing]

i have 5 1/2's