Fast, quiet engagement and Boost-ready stiffness make the SRAM 900 a dependable foundation for a modern trail or cross-country wheelset. This 32-hole rear hub runs a SRAM/Shimano HG-style splined driver body for 9, 10 and 11-speed cassettes and is set up for 12x148mm Boost frames.

Highlights

  • Double Time 4-pawl drive: 52 points of engagement for a quick 6.9-degree pickup
  • SPEEDBALL sealed cartridge bearings for smooth, long-lasting rotation
  • SEEKER 3D-forged flanges angled toward the rim so spokes sit fully in-line under tension
  • SRAM/Shimano HG driver body for 9/10/11-speed cassettes
  • 12x148mm Boost spacing for a stiffer, stronger wheel
  • 6-bolt disc rotor mount, J-bend spokes, 32H, black

Fast, durable engagement

The Double Time drive turns a 26-tooth ratchet ring into 52 points of contact through a straight-aligned four-pawl design, so each pedal stroke is picked up almost immediately without shrinking the ratchet teeth.

Boost-ready strength

The wider 12x148mm Boost spacing pushes the flanges further apart for a broader spoke bracing angle, and the 32-hole drilling adds extra durability for hard trail, enduro or heavier-rider use. SPEEDBALL sealed cartridge bearings and SEEKER angled flanges keep the build smooth and true.

Compatibility & fit

32-hole, 6-bolt disc, J-bend rear hub for 12x148mm Boost frames. The HG driver body accepts 9, 10 and 11-speed Shimano/SRAM cassettes.

SRAM components are covered by a manufacturer's warranty against defects in materials and workmanship. Wear from normal use, improper installation or maintenance is not covered. For any warranty assistance, please return the item to Tune Cycles and our team will manage the claim and support process on your behalf.

  • SRAM 900 rear disc hub, 32H, black
  • Double Time four-pawl drive: 52 points of engagement, 6.9-degree pickup
  • SPEEDBALL sealed cartridge bearings
  • SEEKER 3D-forged and machined angled flanges for in-line spoke geometry
  • SRAM/Shimano HG-style driver body for 9/10/11-speed cassettes
  • 12x148mm Boost thru-axle spacing
  • 6-bolt disc rotor mount
  • J-bend spokes
  • Tool-free, interchangeable end caps
BrandSRAM
Model900 (HU-900-A1)
PositionRear
Spoke holes32H
Spoke typeJ-bend
Driver bodySRAM/Shimano HG-style
Cassette compatibility9 / 10 / 11-speed
EngagementDouble Time, 52 points (6.9 degrees), 4 pawls
BearingsSPEEDBALL sealed cartridge
Brake mount6-bolt disc
Axle / spacing12x148mm Boost thru-axle
ColourBlack
SKU PSI-SR002018013013
Model # 002.018.013.013
Barcode # 710845784835
Brand SRAM