The redesigned SRAM Red ETap AXS upgrade kit featuring the HAMMERHEAD Karoo GPS unit Every aspect has been meticulously enhanced to deliver a seamless shifting experience From the refined brake feel and ergonomic comfort to the silky smooth front shifts this upgrade kit boasts unparalleled wireless connectivity and a broad gear range to cater to every cyclists demands The Sram Red AXS Hammerhead E1 Groupset integrates advanced features like precise power measurement enhanced shift points and improved brake customization Features SRAM Red AXS E1 Power Meter SRAM Red XG1290 Cassette 12 Speed Cassette Hammerhead Karoo GPS Computer SRAM Red AXS Front and Rear Derailleur SRAM Red AXS Brakes SRAM eTap AXS Battery

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