RFX Pro Series Elite Aluminium Achtertandwiel 420 Amount of teeth:46 teeth Durable smooth rolling rollerblade style Durable smooth rolling rollerblade style wheels Yamaha YZ125 250 08 14 YZF250 07 08 YZF450 08 Kawasaki KXF250 450 13 16 RFX sprockets are color coded for the make of bike and also available in standard silver for each model of bike CNC Machined from 7075 aerospace aluminum