Studio : WickWerks Publisher : WickWerks Product Description Cyclocross chainrings made for Shimano 4-bolt road cranks in a 42/34 tooth combination with BRIDGE Shift Technology.? These are the same tooth count and shifting configuration made famous by?Katie Compton?in the 2013-2014 World Cup domination - now configured for Shimano's 4-bolt road/cx cranks. This ring combination is 110mm BCD and is compatible with 9, 10 11 speed chain options. Though the rings work great on the crank alone, if you want the finished look, you can (purchase separately) the special cap covers that Shimano makes for this crank. Be warned, they are expensive, but if you want them, they are available. 0
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