In certain disciplines, the single-ring drivetrain reigns supreme. Championing simplicity, strength and durability, the SRAM RED 1 AXS power meter meets the demands of triathletes, time trialists and cyclocross racers. The power meter features improved aerodynamics thanks to direct mount aero chainrings with fully integrated power, and the tighter gearing range is perfect for racing and flatter terrains.
Single-ring drivetrain simplifies functionality
48t variants have fully integrated power into a direct mount aero chainring
36-46t variants have spider-based power
Chainrings can be easily changed without requiring recalibration of the power meter
Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride
Power balance measures left and right legs separately
SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control
Laser-etched chainring finish is more durable
DUB bottom bracket adds durability and simplicity
Non-aero chainrings can be installed with a single tool, making gearing changes a breeze
The relationship between bottom bracket spindle and bearing is the core of DUB technology. It’s where stiffness meets durability. We took it a step beyond conventional thinking and made everything simpler—better integrating the relationship between chainring, crank, spindle and bottom bracket. It’s this approach to developing a complete system that equals better drivetrain performance.
Quarq’s next-generation DZero power meter platform is named for the D0 Experiment, one of science’s most accurate and innovative projects to detect subatomic particles moving at the speed of light.
Road bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range is gearing for today’s road riding. We completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS. With X-Range, you’re always in the right gear.
Our Hollow Carbon Construction starts in the crank arm and extends into the crank’s spider, maximizing the stiffness to weight ratio.
SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation.
AXS is SRAM’s new bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behavior, personalize controls, get maintenance reminders, and update firmware.
CRANK ARM LENGTH 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mm
BB SPINDLE INTERFACE DUB
BB COMPATIBILITY All SRAM Road DUB BBs
CHAINRING MATERIAL Aluminum
BOLT CIRCLE DIAMETER (BCD) 107 BCD, Direct Mount (DM)
CHAINRING SIZE 36, 38, 40, 42, 44, 46, 48, 50