hello everyone I have just got a allballsracing lower chain roller for bike the eBay listing said it was a direct OEM replacement for my model but looking at it it has a nyloc nut and 1 small washer but the workshop diagram shows 2 large washers and just a bolt which fastens into the frame no nut? do I just use the roller with the original fittings has anyone changed there chain rollers like this I would be grateful for some advice thanks martin
