NOBL ETHOS XC 29" Boost XC Front/Rear Wheels

Cross Country 

1175 Grams 

Light when it counts. Tough when it has to be. Berd spokes and a shallow rim profile give Ethos XC race-day weight, with a reinforced layup ensuring real-world durability.

Ultralight. Uncompromised. Unmatched.

The lightest NOBL rim ever, at a slender 270g, rotational mass is kept to an absolute minimum. They feature 30mm internal front and rear widths, and a 20.5mm depth, delivering optimal torsional stiffness and power transfer for a race-day wheelset with an ultralight layup. Available only in 29” with a full 28-hole spoke count.

The shallowest in the Ethos Series with an 18.5mm depth, these rims are made for the perfect balance of efficiency and compliance. Even with featherweight construction, reinforced sidewalls and layups make the Ethos XC 21% stronger than the Ethos SL. This gives them real-world durability, with the sidewall able to withstand strikes from rocks or debris that gets tossed into the wheel when the going gets rough.

With front and rear specific rim designs, Ethos XC is precisely tuned for XC racing. Up front, a lightweight, compliant construction minimizes rotational mass and enhances grip. Out back, a reinforced layup and wider rim lips increase impact resistance and tire support, engineered to withstand repeated hits. 

Specifications:

Rim Specs

• Weight: 270g
• Wheel Size: 29″
• Inner Width: 30mm
• Depth: 20.5mm
• Bead thickness: 2.9mm upper, 2.4mm lower
• Hole Count: 28h
• Max PSI: 40
• ERD: 595mm (Front and Rear)

Wheelset Specs