SRAM RED AXS 2x12 Groupset - 50/37 Teeth + Hammerhead Karoo 3 Bike Computer

Effortless performance. Effortless perfection.

Every part of SRAM RED has been refined to create an effortless ride. Light brake feel and comfortable ergonomics, smooth front shifting, fully wireless connectivity, and expanded gearing choices fit every rider and their needs. RED is packed with features, like accurate and reliable power measurement, new shift points, and more brake adjustability, while still shaving grams off every component to bring you the lightest electronic SRAM groupset ever.

SRAM RED groupset contains: rear derailleur, front derailleur, 2x shift-brake controls, cassette, chain, 2x disc brake calipers, 2x brake discs, 2x battery, battery charger, front derailleur setup tool, Hammerhead Karoo 3 bike computer and Karoo accessories, crankset (50/37 teeth) / Note: A bottom bracket is not included and must be purchased separately.

SRAM RED AXS rear derailleur

The heart of the SRAM AXS ecosystem is lighter, more efficient, and more capable than ever. Covering cassette ranges from 10-28 up to 10-36, this wireless wonder has larger pulleys to decrease chain articulation and increase efficiency, and an Orbit damper to keep everything in place over the rough stuff. One derailleur ready for 1x or 2x, on road or off.

SRAM RED AXS front derailleur

Not just fast and reliable front shifts, but silent running across the whole cassette. The SRAM RED AXS front derailleur uses Yaw technology with electronic trim to ensure the fastest possible shift while eliminating chain rub in all combinations, with the easiest setup around, thanks to a brilliant new tool.

SRAM RED AXS HRD disc brakes

True one-finger braking is at hand. SRAM have overhauled their hood and lever architecture and achieved breakthroughs for fit across all hand sizes and easy access to powerful and smooth, easy braking from anywhere on the bar.
Independent reach and contact point adjustment allow for highly personalized setup, with no risk of pinching your fingers or bottoming out on the bar no matter your settings.

Better finger wrap on the hood means less fatigue on long days, and Bonus Buttons lets you shift or control ANT+ devices with your thumbs. The caliper is not only stiffer, but lighter too, with phenomenal pad clearance for rub-free operation. All that and SRAM still managed to remove 83 g from the pair.

SRAM PACELINE X brake discs

SRAM took their smoothest and quietest brake track and gave it the lightest aluminum carrier they have made yet. The Paceline brake track offers quiet brake operation. SRAM Lockring included.

SRAM RED XG-1290 cassette

Wide range and tight jumps? Why not both? The lightest, most durable cassette of SRAM breaks new ground for gearing choices as well. Four distinct cassette options, including SRAMs first 10-30 and 10-36 RED cassettes, each provide secure shift ramps specifically designed for electronic shifting, whether racing road on a 10-28 or creating an all-road setup with a 10-36.

SRAM RED chain

SRAM took the lightest and most durable chain they have ever made and made it lighter. With no compromises. The HollowPin construction is lighter and stronger than a solid pin, and cutouts in the outer and inner plates drop 13 g from the previous generation. This results in a lighter, faster, stronger and more durable chain.

Hammerhead Karoo 3 bike computer

The Hammerhead Karoo bike computer is the pinnacle of innovation, design and performance. The stunning screen, high-quality materials and all-day battery life make Karoo a no-compromise bike computer. Thanks to its sophisticated hardware and software design, Karoo is easy to use in any situation and allows you to focus on the road - and the ride - rather than your gear. With comprehensive structured training support, best-in-class navigation, a companion app and a dashboard that lets you manage your Karoo without taking it off the handlebars, Karoo helps you achieve your training goals, explore new routes and enjoy every ride. Topping it all off is Karoo's unparalleled control over your bike's connected components, from SRAM AXS products to e-bikes and ANT+ lights.

SRAM RED crankset

SRAM don't rest on their laurels. So when they found a way to make their lightest and stiffest crank even lighter, they went for it. A new optimized layup drops 29 g from their hollow carbon arms, and to stay on top of current fit
trends SRAM have added their first carbon 160mm crankarm length option.

Technologies:

AXS™

AXS™ is SRAM's integrated wireless platform for connecting electronic bike components with software. The SRAM AXS™ app allows riders not only to check battery levels, influence shifting behavior and configure controls according to personal preferences, but also to create maintenance schedules and update firmware.

Yaw

The derailleur cage rotates and is thus in a constant angular relationship with the chain. The Yaw technology enables trim-free shifting. The shift transitions are thus more direct and precise and in combination with the new Red crank and Red chainrings, the Yaw forms a perfect unit with the chain. Thus, the Yaw technology provides unprecedented performance when shifting forward.

Flattop™

In order to realize the larger ratio range of X-RANGE™ cassettes and to allow correspondingly smoother, smaller-step gear changes, it requires a narrower chain. To ensure that durability does not suffer, SRAM has added material to the flat side of the outer plates and hard-chrome plated the rivets, inner plates and bushings. This way, the Flattop™ chains not only outperform the 11-speed models in terms of durability, but are also at least as efficient.

X-Range

Road bikes are faster and more powerful than ever before, and riders continue to show what bikes with road handlebars are capable of. X-Range™ is the gear ratio for the modern way to ride a road bike. SRAM has completely redesigned the road bike transmission, for more gear range, a more pleasant and more usable gear gradation and thanks to AXS™ also smarter shift settings. With X-Range™ you are always in the right gear.

X-DOME™

The one-piece design of the X-DOME™ technology creates incredibly light, precise and robust cassettes. The open design not only repels dirt better, it also gives the component a longer life and smoother shifting performance.

DUB™ (Durable Unified Bottom Bracket)

DUB™ technology features a sophisticated bottom bracket design and a new crankshaft design. Together, they allow for a more unified approach to bottom bracket fit and a better seal against contamination. Now everyone can benefit from unprecedented durability.

Exogram

Hollow carbon construction starts in the crank arm and extends into the crank spider. It provides an optimal stiffness-to-weight ratio.