By no means one to overlook a beat on new teams, the Kogel Kolossos GRX provides you an outsized pulley cage choice for Shimano’s newest 12-speed GRX gravel group.
It makes use of an identical alloy cage building as their others, however Kogel says that is their stiffest cage design but. Inside are a 14-tooth higher pulley and 18-tooth decrease, each rolling on ceramic bearings with low-drag highway seals. Swap to their ‘cross seals for moist using situations.
The general size of the Kolossos is inside a couple of mm of the inventory cage, so floor clearance stays comparable, however you could want so as to add a little bit of chain size, relying in your setup. Inventory Shimano GRX RX820 derailleur pulleys each have 13 enamel, so the Kolossos GRX equipment would require extra chain wrap.
It is available in gold, crimson, and black. MSRP $475, obtainable now.
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