GALFER RACING BICYCLE CALIPER ADAPTERS 20 mm to 63 mm.

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GALFER RACING BICYCLE CALIPER ADAPTERs

Do you want more braking power on your Super73 or other fat tire bike?  Level up from your stock rotor to these large 203s. The stock Super73 rotor (S-2/R series) is 160mm.  You can add 203s 0r 223s by using a Galfer caliper adapter. It's easy! 
See the chart below.