I have an 04 stumpy with a 115 mm Reba. At 115mm, the bike is less twitchy and feels more controlled, and does not feel weird climbing. I also rode the bike with a 130mm Magura Laurin, which made the bike feel WEIRD. The front end was WAY too high in the front compared to the rear, giving the bike a funky attitude on the trail and making climbing a chore.