What Our Gearhead(R) Experts Are Saying:"The XX SL AXS T-Type Spider Powermeter DUB MTB Wide Crankset is what I spec on any build where the rider is serious about structured training and race-day data. The dual-sided measurement gives you a complete picture of power output that left-only systems simply cannot match. MagicZero keeps calibration running in the background without any manual intervention, and the Flight Attendant integration means your suspension and drivetrain are working from the same data ecosystem at the same time."At the top of the SRAM mountain bike lineup, the XX SL AXS T-Type Spider Powermeter DUB MTB Wide Crankset is built for riders who want the most accurate, lightest, and most connected power measurement system available on a mountain bike. The integrated dual-sided power meter captures data from both left and right sides simultaneously, calculating total watts with the precision that elite-level training and racing demands, and does it with a subtlety and weight profile that does not compromise the performance credentials of the XX SL platform. The threaded direct mount spider design is what enables the accuracy and weight savings here, providing a rigid, stable mounting interface for the chainring that eliminates the flex and measurement inconsistency that less precise mounting systems introduce. MagicZero automatically checks and recalibrates the power meter during use without requiring any rider input, keeping accuracy locked in through the full range of conditions and temperatures that mountain biking delivers. At plus or minus 1. 5%, the measurement accuracy is at the top of the segment, and the CR2032 battery delivers 200 hours of operating time before needing replacement. Flight Attendant compatibility brings the crankset into full AXS ecosystem connectivity, allowing total integration between power data, electronic shifting, and suspension response for riders running a complete AXS build.