Just mounted a TM II 120 rear because I got it free. This is a big change from the 100/100 D756 I had on there. Anyone notice any loss in performance and or gain in off raod traction with the bigger rear tire?

 

Just a tad bit!

 

Which way?

 

You'll have marginally better traction, some power loss and possibly less steering. Skinnier tires carve better and widers ones float better. The Trakmasters run a tad small, a 120 TM is roughly a 110 in some other brands. My 110 Michelin is huge compared to the 100 TM, its seems roughly the same size as the few 120 TM's I saw mounted when i was in NJ.

 

When i switched from the stock rubber to the120 d606, i didn't notice much in power loss... Just a huge improvement in off-road traction.