Stans no tubes ztr arch ex mtb rimstans no tubes has taken one of their best selling rims and made it even better the ztr arch ex mtb rim is lighter wider and tougher than the original arch rim featuresinternal arch design provides durability and stiffness bst bead socket technologycan be used either as tubeless or with inner tubesshorter sidewalls improve tyre performancebuy stans no tubes wheels tyres from chain reaction cycles the worlds largest online bike store