I ride with 2.35" tires front and rear on my Ripmo, one that's a little beefier up front (Schwalbe Nobby Nic) and something that rolls better in the rear (Schwalbe Racing Ralph).
The bike came with Maxxis Assegai front and rear and for the first few rides I regretted getting the bike because it felt like such a pig. The lighter tires make pedaling on flat sections and climbs *so much* more enjoyable, and I can still push it on the descents.