Stan's Notubes Arch Mk3 Mountain Bike Wheelset Boost

Stan's NoTubes Arch Mk3 Mountain Bike Wheelset Boost. The Stan's Arch EX has become one of the most legendary mountain bike rims every produced. But as mountain biking has changed over the years the wheel was due for an update, and the Stan's NoTubes Arch Mk3 was born. The Arch Mk3 is now 24% wider than the previous iteration, while maintaining the same lightweight as the Arch EX. The low profile shape not only rolls faster, but also helps stop the potential for pinch flats and tubeless burps. The wheel has also been made 25% stiffer for improved handling and power transfer. The Arch Mk3 keeps the same tried and true BST tubeless technology for industry leading ease of set up and reliability. The redesigned NEO hubs accelerate quicker thanks to a faster pawl engagement, with a design that's optimized for durability and performance.