Disc Brake Adapter Shimano SM-MA90-R180P/S
Shimano SM-MA90-R180P/S rear disc brake adapter for 180 mm rotors. Fits IS2000 (140 mm) frames and Post Mount calipers. Weighs 29 g including bolts.
Overview
Disc Brake Adapter Shimano SM-MA90-R180P/S
Shimano SM-MA90-R180P/S is a lightweight and durable rear disc brake adapter designed to install a Post Mount brake caliper with a 180 mm rotor on bicycle frames featuring an IS2000-standard 140 mm mounting interface. The adapter ensures correct brake caliper positioning relative to the rotor and provides a practical solution for upgrading to a larger brake rotor.
A larger 180 mm brake rotor provides increased braking leverage and improved heat dissipation, making it particularly beneficial during longer descents and demanding riding conditions.
Manufactured from lightweight and strong aluminium, the adapter combines durability with minimal additional weight. The included stainless steel mounting bolts ensure a secure connection and excellent corrosion resistance. The adapter weighs approximately 29 grams including bolts.
Before installation, always verify compatibility between the frame, brake caliper and 180 mm rotor, and ensure that the bicycle frame supports the specified rotor diameter.
Technical specifications:
- Manufacturer: Shimano
- Model: SM-MA90-R180P/S
- Type: Rear disc brake adapter
- Frame mounting standard: IS2000 (140 mm)
- Brake caliper mounting: Post Mount
- Rotor diameter: 180 mm
- Adapter material: Aluminium
- Bolt material: Stainless steel
- Weight: Approx. 29 g including bolts
- Contents: Adapter and mounting bolts
