Bike Dynamo Pulley Cap For Bicycle Generator Rubber Tyre Sidewall Grip 18/28mm

• Bottle dynamo (generator) pulley cap with ribbed sides
• Ideal for vintage bicycle or modern cycle to give extra grip on tyre sidewall so helps eliminate slippage & lesson tyre wear  
• Slide it over the existing dynamo bottle pulley making sure it grips tight
• Improves traction even in the wet and on worn pulley’s  
• Size ; Inner Diameter 18mm, Outer Diameter 28mm, Height 18mm (all approx)
• Buy Two for £4
• If you buy another item & pay the P&P on the other item this will be posted with it so you get Free P&P on this