The extra traction and stability of plus size tires let you hang it out on the trail just that little bit extra and chew through rock gardens. The No. 9 50w rim redefines the Plus Platform, offering a rim geometry that optimizes tire profile and tread contact like none other. The No. 9 50w uses hookless sidewalls and our TBLS – True Bead Lock System, a bead profile that improves both tire compatibility and interface. It also provides more impact resistance, more durability, and a simple tire setup.