Блок передних звезд SRAM Red D1 DUB 50-37T

X-Range gearing technology gives you more range and a smoother gear progression, so you’re always in the right gear.

Improved front shifting performance for crisp and accurate front shifts.

Unique chainring design results in a lighter weight, stiffer, more durable crankset.

DUB bottom bracket adds durability, simplicity and broad compatibility.

Power upgradeable.

TECHNOLOGIES

DUB - 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.

Exogram - Our Hollow Carbon Construction starts in the crank arm and extends into the crank's spider, maximizing the stiffness to weight ratio.

X-Range - Road bikes are faster and more capabable 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, as well as smarter shift settings - enabled by AXS. With X-Range, you're always in the right gear.