Shimano 105 Di2 12 Speed Groupset

This comprehensive Shimano 105 Di2 12-speed bundle delivers everything you need to build or upgrade a modern road drivetrain with wireless electronic shifting and hydraulic disc braking. At its core are the FD-R7150 front and RD-R7150 rear derailleurs, offering smooth, precise Di2 performance with synchronised shifting and effortless control. Paired with ST-R7170 hydraulic Di2 STI levers, you get confident braking, excellent modulation, and intuitive shifting in all conditions.

The drivetrain is completed with the 105 R7100 HollowTech II chainset, CS-HG710 11–36T cassette, and a 12-speed Hyperglide+ chain with quick link for fast, quiet shifts even under load. Braking performance is enhanced by the RT-CL700 Ice Tech rotor, designed to manage heat on long descents and maintain consistent stopping power. Powering the system is the internal BT-DN300 battery with charging cable, providing long-range reliability and clean integration. Ideal for endurance, racing, or all-round road builds, this bundle offers outstanding value and proven Shimano performance.

The Shimano RT-CL700 rotor is designed to deliver reliable, consistent braking performance for road, gravel, and time trial riders. Using Ice Tech construction, this rotor sandwiches an aluminium core between stainless steel outer layers, allowing heat to disperse quickly for improved control and braking efficiency.

When paired with Ice Tech pads, surface temperatures can drop by as much as 100°C compared to conventional designs, reducing brake fade, extending pad life, and minimising noise under heavy braking. The Center Lock system with an internal lockring ensures a secure, rigid fit while remaining quick and easy to install.

Whether you’re tackling long alpine descents, fast gravel rides, or race-day conditions, the RT-CL700 offers the confidence and durability you need.

Key Features:

• 160mm Ice Tech rotor for consistent and powerful braking
• Aluminium core for improved heat dispersion and reduced fade
• Up to 100°C lower operating temperatures with Ice Tech pads
• Centre Lock system with internal lockring for easy, secure fitting
• Rotor surface designed for pad clearing and cooling
• Suitable for road, gravel, cyclocross, and time trial use

• Shimano hyperglide+ chains have computer designed plate profiles to operate seamlessly with Shimano dce chainrings and cassette sprockets, resulting in 1/3 faster shift time than hyperglide systems even under load
• Outer plate design has been developed to reduce the chance of chain suck
• Sil-tec surface treatment technology (ptfe plating) on inner and outer links and rollers that is smooth running and increases durability
• For use with hg+ drivetrains
• Comes complete with quick link which enables fast tool free chain assembly

• Close ratio gearing allows a more efficient use of energy through finer cadence control
• Largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity
• Sprockets are cut away and drilled to further reduce weight without reducing rigidity
• Nickel-plated finish offers hard wearing resistance to corrosion
• Pearl-bright steel cassette lockring
• For Super Narrow 12-speed HyperGlide+ chains

Shimano FD-R7150 105 Di2 12spd Braze-On Front Derailleur in Silver.

Features:

• Great value high performance 105 double Di2 front derailleur
• The Di2 front derailleur's operation is pioneering, smooth shifting is guaranteed thanks to wireless communication with the gear levers. What's more, shifting the rear derailleur automatically trims the front derailleur
• Full and semi-synchronized shifting programable, synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi-synchronized shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio
• The removal of traditional mechanical cables in favour of electrical wires that connect to the battery not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts
• Wireless connection to the shifters
• The front derailleur also trims automatically; the cage moves in response to the position of the rear derailleur on the cassette to ensure no chain rub and a quiet unobtrusive ride, enabling you to concentrate on the road ahead
• Designed to work with the wider gear pitch spacing Shimano chainsets without sacrificing shifting performance on bikes with 135 / 142 mm o.L.D.
• Braze-on fit as standard; if your bike does not have a braze-on mount seat tube adapters are available
• 12-speed e-tube sd300 wire compatible

Shimano 105 RD-R7150 Di2 12 Speed Rear Derailleur E-Tube in Black provides precise and exact shifting every time.

Features:

• 105 shadow design with Di2 technology, shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
• The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides Ant+ connection to 3rd party devises and replaces the handlebar junction
• Button on the derailleur for Di2 operations, and led light denotes synchronized shift mode, setting mode and charge requirements
• Sleek appearance with low profile shadow design construction reduces the risk of damage in a crash
• Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift
• The removal of traditional mechanical cables in favour of electrical wires to the battery not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts
• Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts
• High tolerance cold forged aluminium link plates and body construction is extremely light and durable
• Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting
• 12-speed e-tube Di2 compatible
• Wide gear ratio compatible up to 11-36t

• Great value 105 wireless hydraulic disc brake Di2 STIs give you control, modulation and power with minimal effort in all riding conditions
• Wireless connectivity to the front and rear derailleurs for effortless trouble-free gear shifts
• With Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
• Full and semi-synchronised shifting programable, synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi-synchronised shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio
• Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold
• Drop bar STI with shift buttons located in a near identical place to the positions you'd assume shifting using a mechanical Shimano STI
• The hydraulic brake lever provides excellent stopping power
• Hydraulic reservoir tank provides pad-to-rotor clearance auto-adjust maintaining braking performance during pad wear
• Finely tuneable reach adjusters for the levers enable custom fitment for all hands
• Levers use cr1632 batteries which last for approximately 1.5-2 years
• Kit contains bled st-r7170 STI, BR-r7170 flat mount brake callipers with pads, hoses and mineral oil (without rotors or adapters)

• Great value 105 wireless hydraulic disc brake Di2 sti's give you control, modulation and power with minimal effort in all riding conditions
• wireless connectivity to the front and rear derailleurs for effortless trouble free gear shifts
• with Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
• full and semi synchronized shifting programable, synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi synchronized shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio
• simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold
• drop bar sti with shift buttons located in a near identical place to the positions you'd assume shifting using a mechanical Shimano sti
• hydraulic brake lever provides excellent stopping power
• hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear
• finely tuneable reach adjusters for the levers enable custom fitment for all hands
• levers use cr1632 batteries which last for approximately 1.5-2 years
• kit contains bled st-r7170 sti, br-r7170 flat mount brake callipers with pads, hoses and mineral oil (without rotors or adapters)

• The power house of Shimano Di2 is a long-life 7.4v li-ion battery that is both compact and reliable, taking shifting effort away from you
• Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads
• The use of a single small and discreet internal battery is light weight, efficient and creates a robust and reliable system
• One charge gives a 1000 kilometre range depending on conditions and front mech operation (as this is the main power drain)
• 500 times rechargeable life
• Battery is to be mounted with seatpost or frame/fork manufactures hardware normally inside the seatpost or seat tube/fork steerer
• Reliable and secure water resistant sd300 e-tube terminals connection
• Charging is done via stem junction or handlebar display
• Battery weight is 50 grams

Shimano Steps EW-EC300 Battery Charging Cable 1700mm.

Features:

• Di2 charger cable for the internal battery that will keep your Di2 system shifting
• Di2 uses a powerful long-life 7.4V Li-Ion battery: keep it in top condition and ready for shifting with this specific Shimano Di2 charger
• 1.5-hour charge time
• Plugs in directly to RDR9250 rear derailleur

• Innovative HollowTech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low
• The chainring teeth have been developed to work in conjunction with Hyperglide&plus 12-speed chains for increased contact to provide greater efficiency and improved power transfer
• HollowTech II allows the bottom bracket bearings to be spaced wider apart, enabling the use of larger bearings and an increased axle diameter
• Can be used with Shimano external or press-fit bottom brackets
• The system allows for easier installation, adjustment, and maintenance
• Lightweight anodised aluminium chainrings for smooth and precise shifting