Mavic xc821 disc mtb rimthe mavic xc821 rim is a high performance fast and lightweight rim designed specifically for xc use this is an incredibly durable rim featuring a welded joint and single eyelet spoke hole reinforcement features material6061 aluminium alloy jointsup welded drilling traditional with single eyelet reinforcement ust tubeless ready disc brake specific profilevalve hole diameter 65mm etrto size 584x21tss 27 5 622x21tss 29 recommended tyre sizes 13 to 27