Sturmey Archer X-RF4 Gear Hub 4V 36 Hole 170mm

Meet the X-RF4 4-Speed Freewheel Rear Hub—a sleek, low-maintenance upgrade perfect for city bikes, commuters, and utility builds. With a total gear range of 210% divided into three even 28% steps, you’ll have the ideal ratios for navigating stop-and-go streets, enjoying brisk rides, and tackling short climbs. The rotary gear selector is cleverly integrated within the frame (no bulky external components), while the direct drive in 1st gear allows you to use a smaller chainring for improved cadence and clearance. Constructed with a robust, lightweight 6061-aluminum shell featuring an anodized finish, the X-RF4 comes in 28/32/36-hole drillings and accommodates standard 13–24T sprockets. Weighing in at just 1160 g, it’s a compact, reliable way to add gears without the hassle of a derailleur.

- X-RF4 internal gear hub — 4-speed freewheel design for city & commuting
- 210% gear range with even 28% steps for smooth pacing across speeds
- Rotary selector—no protruding parts; clean, frame-friendly shifting
- Direct-drive 1st gear enables smaller chainrings and efficient cadence
- Spoke options: 28 / 32 / 36 holes for versatile wheel builds
- Sprocket compatibility: 13–24T (standard single-speed cogs)
- Ideal for commuter bikes, city bikes, cargo & trekking builds
- Low-maintenance internal gear hub performance with freewheel simplicity

Specifications
Brand: Sturmey Archer
Model: X-RF4
Type: Gear hub
Weight: 1160g
Material: Aluminium
Holes: 36
Compatibility: 13 - 24 teeth
Color: Silver