Aluminum sprockets with 350g (size 45) 
 for chain versions 520 and 525 
 Available colors: black, red, silver, hard anodized (more durable than anodized) 
 Sprocket carrier: 110 / 131-5 holes 
 for model: 
 S1000RR (BJ: 09-18) 
 S1000XR (BJ: 15-18) 
 S1000R (BJ: 14-18)