I used a challenger 2" on my SE stretched to a 136, used the notched track so i didn't have to remove my tunnel protectors.
Anyways, basically the same track and the 1.75 lite and it was a huge improvement off trail, but I just used it for out in wyoming. On trail i dont think either is going to last very long. For serious off trail I would recommend a 144 at least...the 136 worked but I got stuck a lot. The nytro liked to dig itself its own grave if I wasn't really careful.