Mtb Bike 7/8/9/10 Speed Freehub Body For Shimano Rm30/rm40/rm60 Steel Bicycle Hub Body Cycling Bike Spare Parts Accessories - Bicycle Hubs - AliExpress
Replacing 7 speed freehub body with 8, 9, 10, 11s freehub. 3x7 to 2x9 or 1x11 drivetrain upgrade. - YouTube
Universal Cycles -- Shimano MTB Freehub Bodies
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