Clutch performance? Jeremy Powers’ prototype SRAM Red eTap 12-speed 1x drivetrain may employ a roller bearing clutch inside the knuckle, but isn’t immune to a bit of detensioning on the bike’s drop before a remount. © Bruce Buckley

Clutch performance? Jeremy Powers’ prototype SRAM Red eTap 12-speed 1x drivetrain may employ a roller bearing clutch inside the knuckle, but isn’t immune to a bit of detensioning on the bike’s drop before a remount. © Bruce Buckleyundefined