The Shimano DX freewheel SF-MX30 is a bolt on sprocket for singles peed drivetrains. It is made of steel & is compatible w/ 1/2″ x 3/32″ chain sizes. The sprocket has 16, 17 or 18 teeth.

Technical Information:

• Series: DX
• Application: BMX
• Gearing: 1
• Teeth: 16 t, 17 t, 18 t
• Thread: 1.181″ x 25.4 TPI ( interne : 30mm – 13-15T) – 1.375″ x 24 TPI ( interne : 34.92mm – 16-22T)
• Compatibility – Chains: 1/2″ x 3/32″
• Material: steel