Shimano Alfine S501 39T 130mm BCD 5 Bolt Outer Chainring Guard Silver Aluminum Part Type_Hub Bearing Retainer The anti-chain drop technology combined

The anti-chain drop technology combined with an integrated chain stabilizer dramatically enhances shifting reliability during rugged rides

and everyday cycling where reliability and efficiency are paramount

the DVO Spring Clip Stroke Reducer ensures long-lasting performance in rugged trail conditions

The availability of four different styles allows customization to meet specific rescue requirements

crafted from durable and lightweight aluminum for reliable performance during long rides and intense training sessions

Shimano Alfine S501 39T 130mm BCD 5 Bolt Outer Chainring Guard Silver Aluminum Part Type_Hub Bearing Retainer The anti-chain drop technology combinedShimano Alfine S501 Chainring Guard