Never go for a ride without a chain tool again the only top cap system that doubles as an emergency chain toolgt works with any 1 18 inch steerer tube with 32mm of available depthgt adds only 25 grams over a traditional compression capgt compatible with 8 9 10 and 11 speed chainsgt holds quick links not includedgt alloy version includes tool to properly set your star nut star nut not includedgt carbon version includes expander plug for your carbon steerer