170mm Bike Crank Arm Set 104BCD with 42T Narrow Wide Chainring 40‑42T Guard Disc for Road Mountain Bike

Feature: 1. High Strength Aluminum Alloy: Made of premium aluminum alloy material, our crank set features wear and tear proof, and it has strong resistant to rust. 2. Accurate Processing: Multi stripe fixing method is adopted to ensure the stability of the chain, and it can reduce friction and noise, thus extending working life. 3. Perfect Fit: With 104mm BCD, 170mm crank arm, 42T narrow wide chainring and 40‑42T guard disc, the crank set will perfect fit for your bike. 4. Wide Compatibility: Our bike crank arm set is compatible with single disc, double disc, three disc, and it fits for most mountain bikes and road bikes on the market. 5. What You Will Get: Our bike crank arm set includes two crank arms, one narrow wide chainring, one guard disc, four screws and four nuts. Specification: Item Type: Bike Crank Set Material: Aluminum Alloy Weight: Approx. 1010g 35.63oz Crank Arm Length: 170mm 6.69in BCD:104mm 4.09in Inner BCD: 64mm 2.52in Compatibility: For single disc, double disc, three disc. Package List: 2 x Crank Arm4 x Screw 4 x Nut 1 x Chainring 1 x Guard Disc