Bikesdirect Sneak Peek at one of the most versatile mountain bikes ever! The Gravity 27.5PLUS comes with 27.5x3.25 Tires/wheels. Fits 26 x 4.0 inchFatbike tires/wheels AND 29PLUS 29 x 3 inch Trifecta front fork brazeons and rear rack mounts. It's the most versatile mtb on the market!