Shimano SM-BH59 vs SM-BH90: Brake Hose Compatibility Guide

⏰ Fast Dispatch: All orders placed before 2:00 PM (UK time), Monday to Friday, are shipped the same day, so you can get back on the bike without delay!

Use the complete hose specification for the exact lever and caliper. Hose construction, connecting insert, olive, seals and fittings must match; BH59 and BH90 inserts are not interchangeable.

🔧 Why Shimano Brake Hose Compatibility Matters

When upgrading or maintaining your Shimano hydraulic brakes, choosing the correct hose isn’t just a minor detail, it’s essential for optimal performance and rider safety.

Shimano offers two main types of hydraulic brake hoses:

• SM-BH90, High performance hose with superior rigidity and power
• SM-BH59, Standard hose offering reliable performance for everyday riding

This guide explains the differences, use cases, and compatibility of each Shimano brake hose series, across road, gravel, MTB, and hybrid setups.

🚴 Shimano SM-BH90 Brake Hoses: For High Power Performance

Built for advanced riders and demanding terrain, SM-BH90 hoses are stiffer and designed for better braking response under pressure. These are commonly found on Shimano’s top tier road, gravel, and mountain systems.

🔍 SM-BH90 Variants and Use Cases

✅ SM-BH90 Compatibility Highlights

🔩 Best Use Cases for SM-BH90

• Road Racing: ST-R9270 with BH90-JK-SSR for maximum braking force
• Gravel & Adventure: RX820/RX810 with BH90-JK-SSR for high loads and control
• Enduro & Downhill MTB: SB, SBLS, SBS or SBM variants for high power and modulation

🚲 Shimano SM-BH59 Brake Hoses: Standard for Everyday Performance

The SM-BH59 hose series is ideal for entry level to mid range bikes. It delivers consistent braking performance with easier installation and more flexibility, perfect for commuters, recreational riders, or casual trail use.

🔍 SM-BH59 Variants and Use Cases

✅ SM-BH59 Compatibility Highlights

🔩 Best Use Cases for SM-BH59

• Older road builds: ST-RS505 with BR-RS505 uses the listed BH59 J SS or JK SS road assembly, not a hose chosen by price category.
• Flat bar road: BL-RS600 with BR-RS405 uses the specified straight BH59 JK SS MTB assembly.
• GRX RX400: Uses the specified BH90 JK SSR assembly, not BH59.

🧰 What You’ll Need for Installation

Replacing Shimano hydraulic brake hoses isn’t just about the hose itself. To ensure safe, leak free operation, make sure you also have:

• 🔧 Shimano Bleed Kit, For a full system flush and setup
• Shimano oil: Use the oil specified for the model. Standard hydraulic mineral oil and low viscosity oil must not be mixed.

🛑 While You’re Upgrading: Don’t Forget Your Pads

Upgrading hoses is the perfect time to inspect or replace your brake pads, especially if you're noticing noise, poor braking power, or pad contamination.

At Gorilla Brakes, we offer high performance Shimano compatible brake pads trusted by riders across the UK and EU.

🔥 Popular Options for Shimano Systems

• 🔧 Factory Racing Organic Pads, For trail, enduro, and daily mixed riding
• ⚙️ Titanium Backed Pads, Race level heat control and weight savings
• 🌧️ All Weather Organic Pads, Built for wet UK conditions and quiet braking

All pads are:

• REACH compliant
• Eco packaged
• 100% recyclable via our Brake Pad Recycling Program

Whether you’re a commuter in London, a gravel rider in Girona, or exploring the Lake District, we’ve got Shimano compatible pads built for your terrain.

🔬 Learn More

• Compare All Compounds
• What Are Brake Pads Made Of?
• Brake Tech & Maintenance Advice