DT Swiss RR 511 700c Black 32-H 622x18mm 581 ERD Tubeless compatible Tubeless-Ready Alloy rim can be used with or without tubes (tape, valves and sealant sold separately) ERD and weights shown include PHR washers 2.0 silver alloy Prolock Squorx Pro Head nipples and PHR washers included The wheel must be built with the supplied PHR washers and Pro Head nipples. The PHR washer must be positioned between the nipple and rim and fit correctly within the radius of the rim. DT Sw Manufacturer Spec ERD: 581