With a redesigned rim profile, the new ARC Offset rims utilize an asymmetrical design to optimize spoke tension balance, wheel durability and wheel stiffness. New 6069 Alloy provides a superior strength to weight ratio over our previous generation of ARC, significantly improving toughness. And now with our new 30mm wide Heavy Duty rim at 22mm deep, we have a rim size and width option for every tyre and every riding style. Our tubeless ready bead and offest design mean these rims are ready to hit any trail with confidence.Key Features: Tubeless ready, strong tyre retention bead., Sizes from 25mm to 40mm internal width.,.Specification: Rim Weight: 25mm - 445g, 30mm - 525g, 35mm - 553g, 40mm - 596g, Finish: Brushed Black Anodise / Vinyl Decals, Type: Tubeless Ready Clincher (Tape and valve kit sold separately), Rim Material: 6069 High Strength Alloy, Rim Depth: 20mm, Rim Offset: 4.5mm, Internal Rim Width: 25mm, 27mm, 30mm, 35mm, 40mm, External Rim Width: 29mm, 31mm, 34mm, 39mm, 44mm, Spoke Holes: 28 or 32 Hole, Rim: ERD600mm (25-40mm), Max Spoke Tension: 122KGF / 1200N.