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Crank Brothers
Synthesis E 11 Hydra Carbon Boost Wheelset - 27.5in

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Synthesis E 11 Hydra Carbon Boost Wheelset

As carbon mountain bike wheels have grown in popularity, riders and manufacturers alike have learned that stiffer is not always better, as overly stiff wheels can negatively impact your bike's handling and even lead to bodily fatigue. Crank Brothers offers a creative solution with the Synthesis wheels, which use an independently tuned front and rear wheel to address the specific performance needs of enduro mountain biking. This consists of a more compliant front wheel that maximizes grip and control in turns, paired with a stiffer rear wheel that enhances stability and tracking at speed. Together they improve comfort and provide a boost of confidence in challenging terrain. This version is the flagship model, being laced up with Industry Nine's Hydra hubs that bring snappy pedal engagement and impressive reliability to your ride.

To start to understand the Synthesis E Wheelset, we need to look at the differences between each rim. The front rim uses a wider profile, with an outer width of 37.5mm, and inner of 31.5mm—this translates to a wider platform to host beefier tires, allowing for soaking up vibrations, meanwhile amping up the traction to keep you locked into your line in loose and wily corners. This rim is laced up with 28 spokes—4 fewer than the rear wheel, allowing just a little more compliance to elevate vibration damping. In the back, Crank Bro's opt for a slightly narrower rim with 29.5mm internal and 36.5 external width, laced up with a whopping 32 spokes for a stiffer feel that offers undeniable control, power, and tracking. But the differences don't stop at the rims—different spokes are employed on each wheel, with the front using Sapim's D-Light that keep weight at a minimum, without sacrificing strength, and the rear dialing in the stiffer, heavy-duty feel you need for tracking with Sapim's Race spoke.

Since nobody wants to waste their efforts on a hub that doesn't react quickly, Crank Brothers uses Industry Nine Hydra hubs that provide near-instantaneous 0.52-degree engagement. This is nearly six-times quicker than their predecessor, and means you'll be able to get on the gas instantly and solidly when you're mashing up punchy climbs and ratcheting through technical terrain. The Synthesis 11 hubs are laced with Sapim CX-Ray spokes for exceptional strength and longevity—another upgrade from the standard Synthesis wheels.


  • Tuned enduro wheels that improve your bike's handling
  • Front-and-rear tuning balances stiffness and compliance
  • Front wheel is compliance-tuned for better grip and control
  • Stiffer rear wheel boosts stability and tracking
  • Wide front rim has room for lofty tires for extra traction
  • Reduce rolling resistance with slightly narrower rear rim
  • Industry Nine Hydra hubs offer lightning-quick engagement
  • Rims are backed by a lifetime warranty for peace of mind
  • Item #CRNH00A
Rim Material
carbon fiber
Wheel Size
Rim Depth
Rim Width
[front internal] 31.5mm, [front external] 37.5mm, [rear internal] 29.5mm, [rear external] 36.5mm
Brake Compatibility
6-bolt disc
Industry Nine Hydra
Front Axle
15 x 110mm Boost
Rear Axle
12 x 148mm Boost
[front] Sapim CX-Ray, [rear] Sapim CX-Sprint
Spoke Count
[front] 28, [rear] 32
Claimed Weight
[set] 3lb 14.1oz (1760g)
Manufacturer Warranty
lifetime on rim

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