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this oversized derailleur cage is built to optimize every watt
like Park Tool BBT-9 or similar
Although the crank and frame dimensions are slightly different
Rotor 30mm
Shimano Oversized Derailleur Cage - GRX 2X and Ultegra RX800 __v9_bump this oversized derailleur cage isOversized ceramic pulley systems are an excellent way of reducing the additional friction caused by clutch derailleurs. Kolossos is the Greek word for a statue, much larger than the original subject. Seems fitting for an oversized derailleur cage. Imagine the performance of replacing your stock pulleys with a ceramic 12 tooth top pulley and a 19 tooth bottom pulley built on the stiffest cage on the market. Besides reduced friction, this cage is built
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