Used to adjust crank chainline or take up any slack when using 29mm (SRAM DUB) spindle cranksKit consists of 5, 2.5mm spacers with a 29mm I.DWheels Manufacturing 29mm ID x 2.5mm Crank Spindle Spacer - 5 PackSKU: WMBB29MMX2.5-5CSS£13.99PriceQuantity*Add to CartBuy NowDeliveryThis item ships from our UK distributor. Standard delivery: 3-5 working days.