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The SRAM 20 mm IS Disc Brake Adapter spaces your caliper out so you can run a larger rotor.
The SRAM 20 mm IS Disc Brake Adapter spaces your caliper out so you can run a larger rotor.
Use an adapter when your frame or fork mount is sized for a smaller rotor than the one you want to run. SRAM suggests 180 to 200 mm rotors for trail riding and 200 to 220 mm for downhill and electric mountain bikes.
