Stans no tubes arch mk3 mtb rimdesigned with input from stans enduro world series teams the new arch mk3 is ready to own every trail wideright optimised for maximum stability with 225 to 25 tyres stans expanded the internal width out to 26mm while keeping the rim incredibly light a proprietary alloy and stronger low profile rim shape means the arch mk3 is built to last featuring bead socket technology the new arch mk3 also offers the unmatched traction control and reliability only