SRAM 900 hub rear black disc

900 Hubs

Whether the goal is a finish line, epic adventure or simply getting back home again, our new 900 hubs are ready for the challenge. On the inside, our smooth and durable DOUBLE TIME drive mechanism ensures rapid lightning-fast engagement for quick and confident pedal responsiveness. SPEEDBALL bearings provide smooth, long-lasting rotation performance. Multiple spoke-count and cassette-capability options, as well as interchangeable end caps make the 900 hubs a perfect choice for any disc-equipped road, gravel, cyclocross, cross country, trail, or enduro bike.

Features

• Fully convertible with tool free end caps

Technologies

DOUBLE TIME RATCHET
Ratcheting up the smarts. This straight-aligned, 4-pawl design turns the 26-tooth ratchet ring into 52 points of contact. The result: smooth 6.9-degree engagement without reducing tooth size or offsetting internal geometry—which means serious long-term durability.

SEEKER
Get unbent. 3D forged and machined for lightweight strength, the flanges are angled towards the rim—allowing the spokes to be fully in-line when tensioned. The result: reduced spoke head breakage and better overall durability.

SIDE SWAP
Switching axles has never been easier. Threadless side caps can be installed and replaced by hand—no tools necessary.
SIDE SWAP SYMMETRICAL side caps refuse to take sides. The left side cap is identical to the right one. No need to figure out where each cap is going.

SPEEDBALL
The only adjustment they’ll ever need was made back at the factory. Every part of the ball bearing comes from the exact same supplier—which means that each bearing bore can be precision machined to fit the bearing race exactly. With tolerances this tight, the days of adjusting play after every ride are over.
SPEEDBALL CERAMIC option available with ceramic balls for faster, smoother and longer lasting bearings.

XD DRIVER BODY
XD is a cassette driver body design that allows the use of a 10-tooth small cog and provides an improved interface with the cassette.

BOOST
BOOST is the standard wheel and drivetrain specification that opens the opportunity for improved frame geometry with shorter chain stays, wider and stiffer suspension pivots, wider range of chainring options, as well as more clearance for bigger tires and wider, stiffer wheels.

Torque Caps
Torque Caps make the bond between hub and fork dropout stronger, with an increased surface area connecting the two. This creates a stronger, stiffer interface, giving you a more responsive front wheel and more control. So you concentrate on the most important connection, the one between your bike and the trail.

Specifications

• Orientation: Front, Rear
• Axle type: Conversion Caps included, TA 12x148, TA 15x110
• Spoke holes: 24, 28, 32
• Brake compatibility: Disc (6-bolt)
• Driver body type: n/a, SRAM XD and XDR, SRAM/Shimano MTB and Road
• Color (hub): Black
• OLD: 100mm, 110mm, 135mm, 148mm