SRAM has created a hub 148mm wide to improve stability and ride, reducing the length of the swingarm.
Why the wheels are important?
Here is the Boost Technology!
A very ambitious project by SRAM that the dish of these wheels ensuring more torsional rigidity, greatly improving your driving uphill, but making the bike easier to handle down the hill!
With this wheels SRAM shifts the imaginary line between the cassette and crankset to the outside.
The transmission operation does not change, but with wheels 29 '' and gaining in torsional stiffness you get to the level of a 27.5''.
I recommend: wheels, hub and crankset must be compatible with the Boost Technology.
Wherever the trail leads, ROAM 40 is ready to go. Aluminum rims with TAPER CORE™ profile bring lighter weight and higher dent resistance. The DOUBLE TIME™ hub delivers strong, swift engagement. And the durable SPEEDBALL™ bearings are precision machined for performance you can trust. With a smart balance of weight, inertia and stiffness, ROAM 40 makes sure you’re always ready to roam.
Lightweight aluminum rim with asymmetrical TAPER CORE™ profile—with a welded joint
User-friendly SOLO SPOKE™ technology
Durable, precision-machined SPEEDBALL™ bearings
Strong, fast engagement with DOUBLE TIME™ hubs
Available in all three wheel sizes
BOOST 12x148 and 15x110 options available for 27.5” and 29”
Convertible to any axle type
Available in XD™ or 10-speed driver body
WHEEL: 26", 27.5", 29"
WEIGHT: 1560g (26"), 1615g (27.5"), 1695g (29"), Wheel pair in lightest configuration, Wheel weights can vary 5%
SPOKE COUNT: 24
SPOKE PATTERN: 2 cross
TYPE: Custom - straight pull
FINISH: Black oxide
RIM SHAPE: Tubeless Ready - Asymmetical 2.5mm offest - TAPER CORE™
RIM USED: Aluminum 6061 T6
SPOKE LENGTH: SOLO SPOKE
EXTERNAL NIPPLES: External
RETAIL AVAILABILITY: December 2013