SRAM Red AXS E1 HRD 2x12-Speed Groupset with Karoo Computer

SRAM Red AXS E1 HRD 2×12-Speed Groupset with Karoo Computer

• Aftermarket groupset includes rear derailleur, front derailleur, shift-brake controls, chain, disc brake calipers, rotors, battery charger, and Hammerhead Karoo

Rear derailleur
The new Red AXS rear derailleur has become even lighter and more efficient. Compared to the previous version, the engineers at SRAM were able to save 16 grams. Larger derailleur pulleys with ceramic bearings and X-Sync tooth profile ensure even more efficient chain operation. The speed-dependent Orbit-Fluid vibration damping ensures reliable chain guidance, even in off-road use. You can easily configure and fine-tune the rear derailleur using your smartphone via the SRAM AXS app. An ANT+ transmitter integrated in the rear derailleur enables communication between your bike computer and the rear derailleur. This allows you to display information on the battery charge status and the current gear ratio in your cockpit.

Front derailleur
The Red AXS front derailleur ensures fast and precise shifting in all conditions. In addition to a revised derailleur cage, another new feature is compatibility with all SRAM X-Range 2x chainrings from 46-33 to 56-43 teeth. Equipped with the proven SRAM Yaw technology and with Auto Trim function, chain slippage is eliminated in all gear combinations. With the integration of AXS technology, the shifting behaviour of the front derailleur can be personalised via the associated app. The newly developed setup tool makes it easy to adjust the derailleur position.

AXS HRD shift-brake system
With the new AXS HRD shift-brake system, SRAM has made the biggest leap in development among the new Red components. Both the shape of the hoods and the carbon brake lever have been redesigned. In addition to improved ergonomics for a wider range of hand sizes, the redesigned brake levers offer significantly better power transmission from all handlebar positions. Thanks in part to a modified pivot point and the relocation of the primary piston to the shifter body, the brakes can be applied with just one finger both in the lower handlebars and in the hoods. Another highlight is the additional shift button integrated into the hoods, which can also be used to operate ANT+-compatible bike computers. The textured main shift paddles work according to the proven eTap shift logic. One rocker switch for upshifting and one rocker switch for downshifting. If both paddles are operated simultaneously, the front derailleur is shifted. The shifting behaviour can be personalized via the SRAM AXS app and additional SRAM Wireless Blip Shifters can also be integrated. The lever width can of course be adjusted using an easy-to-reach hexagon socket screw. Independently of this, the pressure point on the lever can also be adjusted to prevent contact between the lever and handlebars.
The brake callipers, which have also been redesigned, are not only stiffer but also significantly lighter. The pad gap has been widened for easy installation and friction-free operation. Bleeding Edge technology ensures simple and clean bleeding.
Thanks to the slim design, SRAM was able to save an impressive 83 grams of weight on the Red HRD shift-brake system compared to the previous version.

Chain
The new SRAM Red chain has been redesigned from the ground up. The unique flattop design of the plates has made it possible to make the chain narrower and lighter. The resulting greater distance between the outer plates and the sprockets ensures smoother chain running and even more precise shifting. As a positive side effect, the service life of the chain is also increased. This is additionally ensured by a chrome coating on the inside of the plates and the rollers.

Paceline X brake rotors
The Paceline X brake rotor combines the proven, smooth-running friction ring of the Paceline brake rotor with the lightest aluminum spider that SRAM has ever produced. Optimised for road use, the design with its ventilation holes offers smooth, low-vibration braking performance. The rounded edges on the top of the disc minimize the risk of injury and comply with the guidelines of the UCI. As a further advantage, they make it easier to install the wheel, as the rounded top prevents jamming in the brake calliper.

Charger/batteries
The integrated batteries on the rear derailleur and front derailleur have a range of over 1000 kilometers. The charge status can be read at any time via LED lights. The batteries of the rear derailleur and front derailleur are identical and can therefore be replaced on the move. The batteries are recharged within an hour using the charger supplied.

Hammerhead Karoo bike computer (3rd generation)
The new Hammerhead Karoo is a milestone in terms of innovation, design and performance. It features an impressive smartphone-quality screen with the best display for color visualisation and intuitive configuration of your ride data and maps. Operation is via the responsive touchscreen or alternatively via classic buttons. The combination of sophisticated design and innovative software makes the Karoo particularly user-friendly. The fast quad-core processor with 4 GB RAM ensures smooth operation, short charging times and improved battery life. The internal memory of 64 GB offers more space for your maps, routes and training plans. Hammerhead offers the most agile software on the market. Fresh features and improvements keep your device always up to date.