Used to adjust crank chainline or take up any slack when using 29mm (SRAM DUB) spindle cranksKit consists of 5, 5mm thick spacers with a 29mm I.DWheels Manufacturing 29mm ID x 5mm Crank Spindle Spacer - 5 PackSKU: WMBB29MMX5CSS£19.99PriceQuantity*Add to CartDeliveryThis item ships from our UK distributor. Standard delivery: 3-5 working days.