SRAM RED AXS road bike groupset 2x12 including Powermeter crankset | cassette | HAMMERHEAD Karoo bike computer
Evolution instead of revolution - the new Red AXS groupset has been revised in all areas to offer you improved ergonomics, better shifting performance and a wider range of gear ratios. In addition, SRAM has managed to reduce the weight of almost all components in order to conquer the throne of the lightest electronic groupset. With the proven SRAM AXS app and the integration of the Hammerhead Karoo bike computer, you can personalize your Red groupset even more and display shifting information and charge levels while riding.
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 visualization 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.
AXS HRD shift-brake systemWith 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.
Rear derailleurThe 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 with your smartphone using 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 your current gear ratio in your cockpit.
Front derailleurThe 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 personalized via the associated app. The newly developed setup tool makes it easy to adjust the derailleur position.
CrankThe previous version was already one of the lightest cranks on the market. Thanks to an optimized layer construction of the hollow carbon crank arms, the engineers were able to reduce the weight of the 2024 version by another 29 grams. The proven X-Range gear ratios with 13 teeth between the large and small chainrings enable clean and crisp shifting without having to counter-shift several gears on the rear derailleur. The one-piece construction of the chainrings reduces weight and ensures high rigidity. The teeth are specially coated for a particularly long service life. The crankshaft was developed for the new DUB Road bottom bracket standard for a wide range of crank applications. The crankshaft is compatible with all standard bottom bracket housings via the corresponding DUB bottom bracket. With the AXS power meter integrated in the chainrings, you have the perfect tool to effectively control your training.
Powermeter features:
- Power meter integrated into the chainrings for maximum weight savings
- 10K Active Temperature Compensation
- wireless data transmission via Bluetooth Low Energy or ANT+
- Cadence measurement via acceleration sensors (no additional magnet required!)
- Waterproof construction according to IPX7 standard
- LED power indicator always informs about battery level
- 200 hours operating time (tool-free battery change according to CR2032 standard)
- Power Balance measures the power of the left and right leg independently
- +/- 1.5% measuring accuracy
ChainThe new SRAM Red chain has been redesigned from the ground up with a unique flattop plate design that makes 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 also ensured by a chrome coating on the inside of the plates and the rollers.
CassetteWide range or small gear jumps? The SRAM Red cassettes offer you both. With their X-dome design and milling from a single block, they are also among the lightest cassettes on the market. In contrast to other lightweight cassettes, only the largest sprocket of the Red cassettes is made of aluminum, while the sprocket block is made of durable steel. For fast and clean shifting, they have shifting ramps that have been specially optimized for the electronic SRAM AXS rear derailleurs. SRAM's tried-and-tested 10-tooth sprocket is one of the reasons for the wide range. In addition to the 10-28 and 10-33-tooth versions, there are now also Red-based cassettes with 10-30 and 10-36 teeth.
Paceline X brake rotorsThe 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. Optimized 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. A further advantage is that they make it easier to install the wheel, as the rounded top prevents jamming in the brake calliper.
Charger/batteriesThe 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 for 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.
Technical data Red AXS groupset:
Material: aluminum, carbon, plastic
Gears: 2x12
STI version: Shift lever | brake lever for hydraulic disc brake | right and left handlebar side
STI battery: CR2032
Power measurement system: Spider measurement system | measurement on both sides
Power meter battery: CR2032 button cell
Battery life power meter: up to 200 hours
Brake fluid: DOT 5.1
Brake line: 950 mm | 1800 mm
Brake type: disc brake | flat mount
Data transmission smartphone | bike computer: Bluetooth, ANT+
Chainring gradation compatibility: 46-33, 48-35, 50-37, 52-39, 54-41 or 56-43 teeth
Cassette compatibility: 10-28, 10-30, 10-30 or 10-36 teeth
Front derailleur mounting: braze-on (clamp optionally available)
Brake rotors: 160 mm Paceline X | Center Lock
Battery life: approx. 1000 km
Weight according to manufacturer: n.a.
Weight self-weighed: from 2170g (without brake rotors and bottom bracket)
Technical data Hammerhead Karoo:
Device dimensions (W x H x D): 103 x 63 x 18 mm
Display size: 3.2" touchscreen
Display resolution: 480 x 800 pixels
Color display: yes
Operation via touchscreen: yes
Operation via buttons: yes
Water resistance: IP67 (waterproof and dustproof)
Charging port: USB-C
Battery: 2500 mAh lithium-ion battery
Battery life: 15+ hours
Charging time: 30% in 30 minutes, 100% in 2.5 hours
Satellite navigation: GPS, Galileo, GLONASS, QZSS, Beidou
Barometer: yes
Temperature sensor: yes
Acceleration sensor: yes
Rotation sensor: yes
Magnetometer: yes
Processor: quad-core 2.0 GHz
Internal memory: 64 GB
Working memory: 4 GB
Smart notifications: yes (display of email, SMS and calls in connection with smartphones)
Sensor connectivity: Bluetooth, ANT+
Languages: German, English, Spanish, French, Italian
Pre-installed maps: worldwide
Color: black
Weight according to manufacturer: 118g
Weight when weighed: 118g
Scope of delivery:
1x HAMMERHEAD Karoo bike computer (3rd generation)
1x SRAM RED AXS 2x12 shift brake lever left and right including flat mount brake calipers and brake lines (filled)
1x SRAM RED AXS rear derailleur 12-speed including battery
1x SRAM RED AXS front derailleur including battery
1x SRAM RED DUB Powermeter crank including 2x chainrings
1x SRAM RED XG-1290 12-speed cassette | silver
1x SRAM RED 12-speed chain 114 left
1x battery charger and charging cable
2x SRAM Paceline X 160 mm brake rotors | Center Lock including lockrings
1x SRAM DUB Road bottom bracket (optional)
1x HAMMERHEAD handlebar mount
1x HAMMERHEAD adapter for Garmin mount
1x HAMMERHEAD USB-C to USB-C charging cable
1x HAMMERHEAD safety strap
1x Quick start guide
Please note the information on the
battery regulation
