Backbone Carbon Wheelset (27.5") Project321 Hubs
The Backbone Carbon is a 29mm internal width mountain bike wheel, ready to work hard on the climbs and rip back down. A balance of precision steering, light weight and durability make this the perfect 27.5 inch mountain bike wheel for any occasion.
Made just over the mountains from us in Bend, Oregon, Project 321 hubs offer absurdly fast, 216-point engagement and light-yet-strong alloy free-hubs. We use their “loud” pawl system for rock-solid reliability.
All Astral wheels feature a Tubeless Easy rim profile for painless tire installation and are hand-built by people that care in Eugene, Oregon.
Need a special build? We can do that. Contact us for dream-builds or rebuilds and we’ll make it happen. Services also available through dealers
*9mm conversion available on 15mm thru axle
- 27.5" Carbon - Hookless, tubeless ready
- Rim Depth: 32mm Carbon Clincher
- Rim Width: [ex] 33.5mm, [in] 28mm
- Tire size recommendation: See chart in product images
- Includes: Taped for tubeless, tubeless valves and Astral's Certainty
Build Specifications:
Project 321 Hub Build
- Weight: 1600g
- Spoke count: 28/28
- Spoke type: Sapim Race, Round
- Bearing: Precision Stainless
- Front Axle Options: Boost, 15mm/Boost
- Rear Axle Options: Boost, 142mm TA/ 135mm QR
- Freehub Options: Shimano 10/11 spd, or SRAM XD
- Freehub Material: CNC Machined Alloy, 216T high engagement, loud
- Hub Body: 6-Bolt, CNC machined in Bend Oregon
*We do our best to ship your wheel order ASAP, but because many wheel orders are built to order, please allow up to one week for shipment once your order is processed. Custom orders like color decals may take up to one week.
