Maxxis Re-Fuse Tire - 27.5 x 2 Tubeless Folding Black Dual MaxxShieldMaxxis Re Fuse Tire 27. 5 x 2 Tubeless Folding Black Dual MaxxShield. The Re Fuse rolls fast and has extreme durability and can handle long miles on everything from pavement to gravel. Knurled tread pattern for low rolling resistance and all condition grip Intended use: training urban hardpack TECH SPECS Color Black Defined Color Black ISO Diameter 584 650b 27. 5" ISO Width (mm) 51 Labeled Size 27. 5 x 2 PSI 60 TPI 60 Tire Bead Folding Tire Diameter