Duroc SD37 is the result of real-world EWS racing and good old-fashioned downhill thrash testing. Welded and eyeleted Duroc SD37 rims for maximum impact resistance, widestance tire shaping, and STR tubeless tire retention. Straight-pull SRX hubs with high-strength Dual- Tooth pawls and precisionground steel axles. Wheelsmith doublebutted spokes and brass nipples, precision tension balanced with SpokePrep assembly compound for longevity. E-MTB approved for electric bicycles. End caps included for 110 x 20mm &100 x 15mm. Item Specifications: , Color: Black, Defined Color: Black, Front Axle: 20mm Thru x 110mm,15mm Thru x 100mm, Hub Drilling: 28spokes, Hub/Brake Compatibility: 6-Bolt Disc, Rim Width (Internal): 32mm, ISO Diameter: 584 / 650b / 27.5", Rim Material: Alloy, Rim: Duroc SD37, Rim Depth (mm): 17mm, Skewer Included: No, Tire Type: Tubeless Ready Clincher, Valve Length: Short Presta Valve 32-40mm, Wheel Size: 27.5", Rim Joint: Welded, Eyelets: Single, Rim Width (External): 37, Spoke Profile: Double Butted, Spoke Info: Wheelsmith DB14, Nipple Material: Brass, Nipple Color: Black, Spoke Color: Black, Spoke Interface: Straight Pull, Hub Color: Black, Rim Color: Black, Hub Model: SUNringlxe9 SRX , Designed for ebike: Yes,