ROGUE Ultrex TBone Ripper Scooter Wheel Ring (Single) - Orange/BlackThe Ultrex interchangable rings are the first of it's kind in scootering to give riders the option to interchange their urethane when need be. The Ultrex rings are available in the 89A Tyler Bonner Ripper series and 88A Gummy series, 6 clean color ways. The wedge shaped ring is designed for the 2 hub halves to tighten together concentricity to allow quick disassemble with a 4mm allen key. Overview: 110mm Available in Gummy (88A) and Ripper (89A)