When the terrain turns violent this is the lightest most compliant competitive gravel wheelset available. At 1 079g these are the lightest gravel wheels in their class paired with ARRIS Composite spokes for compliance while the largest bead hooks in the category can take an absolute pounding and still keep air in the tires. At a Glance Use - Gravel Racing and Riding Weight - 1 079g with tape and valves Rim Depth and Width - 38mm F/R external 27mm internal width Hub and Engagement - DT Swiss 180 EXP internals 36T Spokes - Roval Aero Composite Spokes by ARRIS Rims Wheel Size / ETRTO 622 × 27 700c Tubeless Compatibility Yes Insert Compatibility Yes Brake Compatibility Disc Centerlock Rim Construction Carbon Clincher Hooked Valve Stem Length Roval Tubeless Valve Alloy 40mm Hole Count Front: 21H Rear: 24H Rear Rim Terra CLX III Carbon Clincher 700c WC043-2 Rear Rim Dimensions Depth: 25.5mm External Width at widest point: 38mm Internal Width: 27mm Bead Hook Width: 4.9mm Front Rim Terra CLX III Carbon Clincher 700c WC043-1 Front Rim Dimensions Depth: 25.5mm External Width at widest point: 38mm Internal Width: 27mm Bead Hook Width: 4.9mm Hubs Rear Hub Roval Low Flange Road Hub Center Lock 12x142mm LF19-R Rear Freehub Body DT Swiss Ratchet EXP 36T : Sram XD-R Rear Hub Bearing DT Sinc Ceramic Bearings - DS:1526 15 x 26 x 7mm NDS: 6802 15 x 24 x 5mm Front Hub Roval Low Flange Road Hub Center Lock 12x100mm 19mm OD End Caps Installed LF18-F Front Hub Bearing DT Sinc Ceramic Bearings - DS: 6802 15 x 24 x 5mm NDS: 6802 15 x 24 x 5mm Spokes and nipples Nipples ARRIS MK4 Spoke Nipple Alloy 6mm Rear Spokes Roval by ARRIS Composite Aero Spoke with Ti End Pieces: T-head 24qty DS: 299mm NDS: 294mm Rear Lacing Pattern One-Cross / Three-Cross 2:1 Not Tucked Front Spokes Roval by ARRIS Composite Aero Spoke with Ti End Pieces: T-head 21qty DS: 287mm NDS: 300mm Front Lacing Pattern Two-Cross / Radial 2:1 Not Tucked Tire info Tubeless Tape Width 30mm Tire Type Clincher Tubeless and Clincher Tube Type Design Tire Tracer TLR 45mm Approved Tire Widths  35mm-60mm 2.2" Max Pressure 35mm – 70psi​ 36-45mm – 55psi​ 46-50mm – 45psi​ 51-60mm - 40psi Weight Wheelset Weight 1 079g with valves and tape Rear Weight 590g with valves and tape Front Weight 489g with valves and tape General Warranty Limited Lifetime Warranty Assembly Method Hand Built Weight Limit 275 lbs / 125 kg Certifications ISO 5775-2 UCI Approved E-bike Approved No Extras 4 Extra Spokes and Nipples Roval Wheel Bag Shimano HG 11/12-Spd. Road Freehub and end Caps rear wheel only