Helix Racing Products Heavy Duty Chain Roller Small, Part #177-55

Helix Racing Products Heavy Duty Chain Rollers (small) with Sealed Bearings are designed for most On-Road or Dual Purpose Bikes. These can also be used on Off-Road Bikes. Width: 29mm. Outer Diameter: 32mm. Inner Diameter: 8mm. Includes 608Z Bearings. Made in America.