A Talon gearbox sprocket for the BSA Bantam trials models. These are suitable for use with a 420 chain and are available with 13, 14, 15, 16 and 17 teeth. Please note the smaller trials version may foul the standard sprocket lock nut. If this is the case, you will need to make alteration to the locknut until it clears the final drive chain. APOLOGIES WE ARE OUT OF STOCK OF 17 TEETH.