Feature: Type: Chain Wheel Material: Aluminum alloy Tooth pitch: 1/2 Inch / 12.7mm Brand: Bafang Compatible Motor Model: 250-750W Fits For: BAFANG BBS01, BBS02 Only compatible with BAFANG BBS01, BBS02 48V 750W, 500W, 350W, 250W Mid Drive Kit; NOT compatible with BBSHD 1000W mid motor Offset value: 46T: 6.5mm, 48T: 6.5mm, 52T: 6.5mm. If your bike is equipped with a high-speed freewheel/flywheel (e.g., greater than 9 speed), we recommend using a 42T chainring to effectively prevent chain drop Diameter of chainring: 46T: 7.5", 48T: 7.8", 52T: 8.5" Chain guard: 46T, 48T, and 52T chainrings include a chain guard Made of CNC aluminum alloy, this bike chainring is highly durable. Enhance torque performance with the premium BAFANG chainring for an improved e-bike riding experience Package Includes: 1 x Chainring with cover (based on selected option)