RST Suspension Stem with Lockout – Adjustable Angle

RST Stem Shock: The Suspension Stem for Ultimate Riding Comfort

The RST Stem Shock transforms your standard rigid stem into a suspension stem, adding valuable damping that a traditional fixed stem simply can’t offer. This means less impact on your hands, wrists and shoulders, even on rough roads, cobblestones, gravel paths and light off-road trails. It’s a smart, non-invasive way to boost comfort without heavily modifying your bike. Best for riders of trekking bikes, e-bikes, city bikes, gravel bikes and hardtail mountain bikes who want a smoother, more comfortable ride on longer trips.

Key Features

• Converts a rigid stem setup into a comfortable suspension stem
• Reduces fatigue and strain on hands, wrists and shoulders during long rides
• Includes a lockout function for full control when you need a firm setup
• Adjustable angle: ships at 0°, with an included adapter for +4° or -4°
• Comes with a medium spring, plus a stiffer spring included for easy customization
• Ideal for trekking bikes, e-bikes, city bikes, gravel bikes and hardtail MTBs

Specifications

• Brand: RST
• Product code: RST3890004
• EAN: 4711742060929
• Default angle: 0° (adjustable to +4° or -4° with included adapter)
• Spring: Medium (stiffer spring included)
• Lockout: Yes

Which bikes is the RST Stem Shock suitable for?

The RST Stem Shock works especially well on trekking bikes, e-bikes, city bikes and gravel bikes, and can also be a valuable addition to hardtail mountain bikes. It’s designed to improve comfort on rough roads, cobblestones, gravel paths and light off-road terrain without requiring major bike modifications.

Can I adjust the stem angle and spring stiffness?

Yes. The Stem Shock ships set up for 0° mounting, but comes with an adapter that lets you adjust the angle to +4° or -4° to suit your preferred riding position. It also includes a stiffer spring alongside the standard medium spring, so you can fine-tune the damping feel.

Does the lockout function affect ride comfort?

No, the lockout simply gives you the option to firm up the stem when you don’t need suspension, such as on smooth roads or during hard climbs. When unlocked, the Stem Shock provides its full damping benefit, reducing strain on your hands, wrists and shoulders during longer or rougher rides.