This is for a newly hand built 27.5 inch 650b gravel bike rear wheel incorporating brand new black 32 hole DT Swiss G540 db disc rims, brand new black Shimano M475 6-bolt disc specific rear hubs, Halo silver stainless steel spokes and nickel plated brass nipples. After extensive testing DT Swiss have settled on a full 24mm as the perfect width for modern Gravel bikes. The added width gives better support to wide, 35c or larger tyres, allowing the use of lower pressures, enhancing grip & comfort whilst reducing rolling resistance & tyre flex under cornering. Robust, sleeved construction gives a great value package for a wide gravel rim with a suggested maximum system weight of 130kg. The rims can be used with or without tubes. For use with 6-bolt disc brake rotors and quick release dropouts, the Shimano M475 hubs use cup and cone bearings, and double contact sealing prevents mud ingress. The rear freehubs can take 8-10 speed Shimano HG type road cassettes, or 8-12 speed Shimano HG type MTB cassettes. The hubs are set for 135mm QR - skewer provided. The rims are 3-cross laced to the hubs with new Halo silver stainless steel spokes and nickel plated brass nipples. This beautiful wheel has been hand trued, dished and spokes tensioned according to rim manufacturers recommendations. Wheels are bubble wrapped and boxed properly. Sent using insured and tracked postage. Please look at my other items. Thank you for looking.