Backbone Wheelset (27.5") Approach Hubs by White Industries

The Backbone is a bombproof 32mm internal 27.5 trail wheelset mountain bike wheelset. We improve the stiffness, strength and longevity of a wheel by using an asymmetric (ASYM) rim design than improves spoke tension balance by up to 30%. On the trail, this translates to balanced handling you can rely on in even the ruggedest of terrain. With a 30mm internal width it’s perfect for wide trail tires. 

Our Approach hubset is built for Astral Cycling by long-time partner White Industries. It includes the same internal mechanisms as their classic CLD hub, but features a bomber heat-treated steel freehub body at a nominal 28 gram weight sacrifice.

All Astral wheels feature a Tubeless Easy rim profile for painless tire installation and are hand-built in Eugene Oregon by people that care.

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

Build Specifications:

Astral Approach Hub Build

• 27.5" Alloy - ASYM, tubeless ready
• Rim Depth: 20mm Clincher
• Rim Width: [ex] 36mm, [in] 32mm
• Weight: 1795g
• Brake type: Disc brake, Center Lock
• Spoke count:  28/28
• Spoke type: Sapim Race, Round   
• Hub set: Astral Approach - Center Lock
• Hub Body: Center Lock, CNC machined in Petaluma CA by White Industries
• Bearing: Enduro Stainless
• Front axle: Boost (15mm, 12mm)/ 15mm/12mm/9mm
• Rear axle: Boost 148mm/ Boost 141mm QR/ 142mm/ 135mm
• Freehub Options: Shimano HG 10/11, SRAM XDR or Shimano Micro Spline
• Freehub Material: CNC machined, case hardened steel, electroless nickel plated
• Tire size recommendation: See chart in product images
  
• Includes: Taped for tubeless, tubeless valves and Astral's Certainty