D.I.D Racing Pro NJS Chain

D.I.D Racing Pro is a classic Japanese track chain for track, keirin, and fixed gear. It is a 1/2 x 1/8-inch chain for drivetrains with a wide track chainring and rear sprocket, built for high loads and for cyclists who want a strong, smooth-running chain with a clear connection to Japanese track culture.

Racing Pro is NJS-certified and approved for professional keirin in Japan. The NJS marking means the chain meets the requirements for components used in Japanese keirin and is an important part of the product's identity - this is a genuine track chain, not an ordinary singlespeed chain with a racing name.

D.I.D chains are especially appreciated for their smooth, quiet chain movement, making Racing Pro an interesting choice both on the velodrome and for a well-built street fixed gear. The silver finish is rust-resistant and keeps the look classic and understated.

Racing Pro is the right choice if you're building a serious fixed gear or track bike with a 1/8-inch drivetrain and want a Japanese NJS-certified chain that puts strength, precision, and smooth chain movement at the center.

Quick Specs

• Product type: Track / fixed gear chain
• Chain size: 1/2 x 1/8"
• Use: Track, keirin, fixed gear, and single speed with a 1/8" drivetrain
• Compatible with: Chainrings and rear sprockets designed for 1/8" chains
• Not compatible with: Geared drivetrains and components designed for narrower derailleur chains
• Certification: NJS-approved for Japanese keirin
• Finish: Silver, rust-resistant
• Manufacturer: D.I.D / Daido Kogyo, Japan