Shimano Brake Hose - SM-BH90-SB
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Product Information
Full details
The Shimano SM-BH90-SB is designed for mountain bike enthusiasts and mechanics looking to maintain high-performance hydraulic braking in XTR M985 and M988 systems. It provides exceptional lever feel and stopping power thanks to its reinforced, stiff construction, though users should note it is strictly intended for specific Shimano brake calipers and is not universal for all hydraulic systems.
All features
| Model Part Number | SM-BH90-SB |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
Is this hose compatible with non-Shimano disc brakes?
No, this hose is specifically designed for Shimano XTR M985 and M988 systems and should not be used with other brands.
Do I need to bleed my brakes after installing this hose?
Yes, whenever you disconnect or cut a hydraulic brake hose, air will enter the system and a full brake bleed is required.
Can I reuse the olive and insert if I cut the hose again?
No, olives are single-use components that deform to create a seal; always use a new olive and insert when reconnecting the hose.
What tools are needed for installation?
You will need a cable cutter or specialized hose cutter, a torque wrench with the appropriate size hex bit, and a Shimano bleed kit.
Is 170cm enough for a front brake?
170cm is the standard length for a rear brake, but it is more than sufficient to trim down for a front brake setup.
Troubleshooting
Brake lever feels spongy after installation
The system likely contains trapped air; perform a thorough bleed of the hydraulic system according to Shimano guidelines.
Fluid leakage at the caliper connection
Ensure the olive was compressed correctly and the connecting bolt is tightened to the specified torque.
Hose is too long for the frame
Carefully measure the required length, trim using the included cutting tool, and install a new olive and insert.
Pros and Cons
Pros
- High-pressure reinforcement for consistent braking
- Professional-grade components included for installation
- Precise 2.1mm bore for superior fluid flow
- Easily trimmable to accommodate various bike frames
Cons
- Compatibility limited strictly to XTR M985 and M988 series
- Requires professional bike mechanic tools for proper cutting and bleeding
- Resin coating requires careful handling to avoid kinks
Setup, Compatibility & Care
Installation of the SM-BH90-SB requires careful attention to detail. Since this is a high-pressure hydraulic line, always use the provided olive and insert to create a pressure-tight seal. Use a sharp, professional-grade hose cutter—rather than side cutters—to ensure a clean, square end on the hose.
Compatibility: This hose is specifically engineered for Shimano XTR M985 and M988 hydraulic disc brake systems. Do not attempt to use it on brake systems requiring different connection standards or bore diameters.
Care: Periodically inspect the hose for any signs of external abrasion or leaking at the connection points. If the hose becomes kinked during a crash, replace it immediately, as internal structural damage can cause failure under high-pressure scenarios.