Shimano RX100 brake caliper

Shimano RX100 SLR S BR-A550 brake caliper: performance and precision for your road bike

When it comes to road bike braking systems, reliability and precision are key. The Shimano RX100 brake, specifically the SLR S BR-A550 model, stands out as a trusted choice for cyclists who demand responsive, durable, and efficient braking. Let’s take a closer look at this iconic component that blends classic design with proven performance.

A rim brake caliper for total control

The Shimano RX100 BR-A550 is a dual-pivot caliper brake designed for rim braking on road bikes. This system delivers excellent brake modulation while providing enough stopping power for technical descents or sudden stops in urban settings.

Equipped with Shimano’s SLR (Shimano Linear Response) technology, this brake ensures a quick and smooth reaction from the moment you squeeze the levers. Cable return is faster, the lever feel is crisp, and braking becomes more predictable and responsive.

Technical specifications of the Shimano RX100 BR-A550

Here are the key features of this model:

• Type: road bike dual-pivot caliper brake

• Compatibility: road bikes with rim braking systems

• Material: forged aluminum for an ideal strength-to-weight ratio

• Technology: shimano SLR for smoother lever action

• Mount type: standard center bolt

• Average weight: approx. 180g per caliper

• Brake pad reach: adjustable to fit different rim widths

• Finish: classic silver with a clean, vintage Shimano RX100 aesthetic

This model integrates seamlessly into classic road bike builds, especially for vintage restorations or cyclists looking to maintain period-correct components while enjoying reliable braking.

Why choose the Shimano RX100 brake ?

The Shimano RX100 BR-A550 is widely appreciated for its mechanical reliability. It’s one of those components that has stood the test of time, maintaining its popularity decades later. It particularly appeals to vintage bike enthusiasts and restoration fans, offering trustworthy performance while preserving the authenticity of early Shimano road groupsets.

It’s also easy to adjust, requires minimal maintenance, and compatible parts are still available on the secondhand and surplus markets. This makes it a cost-effective and sustainable solution for riders who don’t want to compromise on safety.

In summary

If you're looking for an effective, long-lasting rim brake caliper with real character, the Shimano RX100 SLR S BR-A550 is a smart choice. It meets the expectations of road cyclists who care about their gear—whether riding through mountain passes or city streets. With proven Shimano technology and a timeless design, it strikes the perfect balance between looks, performance, and dependability.