Pit Bike Chain Adjusters These pit bike chain adjusters fit most pit bikes which have a 15mm axle. With an anodised silver finish they will 'stand out'from the typical type chain adjusters. Chain adjusters enable quick & precise wheel alignment & chain adjustment. These are an essential to ensure the set-up of your bike is correct & for regular maintenance checks. Made from aluminium you know they will be good quality. Supplied as a standard part on our M2R pit bikes these will fit straight on to your M2R if you ever need to replace them. (Please note: some have been removed from new crated bikes so some marks may be present)