New SRAM Transmission Gravel Group Spotted at Unbound: 13 Speed AXS XPLR?
Briefly

The group features the latest SRAM RED shifters. The potential shift to 13-speed can be achieved with a firmware update for existing electronic AXS shifters.
The unused left shifter postulates activating a RockShox Reverb AXS dropper post. Keegan Senson's 14th place finish at Unbound Gravel followed Lachlan Morton's record time.
Read at Bikerumor
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