It's going to depend on tire manufacturer. I run Michelin Rock'r R2s, 2.35, on my 134, which is same frame. They measure the same width as a Maxxis DHF 2.5. I have clearance and no issues. You're best bet is to find what tire you want to run and measure/ask about that particular tire.Anyone running 2.5's on the first gen process? If so, how's the mud clearance? Any rubbing?
Bike came stock with 2.3's and I'd like to go up to either 2.4's or 2.5's.