The ZTR Arch EX is a light, stiff tubeless rim for ''aggressive XC use''. Lightweight at just 400g but super-stiff.
At 24.6mm it's a bit wider than your average rim, meaning you get a better tyre profile, improved stiffness and excellent strength. The internal structure of the rim forms an arch (hence the name), massively increasing stiffness which means excellent resistance to bending and a nice strong wheel.
Like all NoTubes rims this can be run tubed or tubeless. It is compatible with the lightweight Olympic rimstrip or the even lighter yellow tape / valve stem combination, we'd recommend the yellow tape if you want to use tubeless-ready tyres (Mavic UST or Bontrager for example), or the rimstrip if you want to run standard tyres with a latex sealant.