It's no easy feat to improve upon a power meter that was already one of the lightest, cheapest, and most accurate on the market, but the 4iiii Precision 3 has done just that. Regardless of whether you are contesting Iron Man triathlons, stages of the Tour de France, or town-sign sprints during the weekend club run, the Precision 3 offers truly world-class technology, at an affordable price point. SIMPLY CONNECT As you’d expect, the 4iiii Precision 3 is feature packed and easy to install. It incorporates Bluetooth and ANT+ connectivity, so you can connect it to your choice of bike computer or indoor trainer. Pair it with a compatible device, and it'll work with a plethora of indoor training software, including TrainerRoad and Zwift. Installation of the device is as simple as installing any Shimano left-side crank arm. The power meter arrives pre-attached to the Dura Ace 9200 crank arm, all that's left for you to do is install it on your bike, as you would a regular crank arm. Once installed, follow the set-up instructions via the app, available on iOS and Android. With the app you can also update the firmware, check battery status, and calibrate your power meter. LONGER-LASTING BATTERY In the previous iteration, the Precision already boasted a respectable 120-hour battery life. For the latest version, this has been increased to an industry-leading 800 hours. Operated by a simple to replace CR2032 battery, even the most dedicated cyclists will rarely need to replace the battery. Incredibly, despite this increase in battery life, the casing that houses the device is almost half as thick as previously, making it compatible with even more frames. Handily, LED lights have been added to indicate battery life, connectivity, and calibration status. ACCURATE AND RELIABLE A power meter lives and dies by its accuracy and reliability; after all, there is little point in looking at data from a device that can't be trusted. Over the years, 4iiii have established themselves as a reputable player in the industry, and are well regarded for the accuracy and reliability of their devices. As you'd expect, then, the Precision 3 is no different. Offering accuracy of +/-1%, there are few if any competitors on the market claiming anything better, and you can count on this accuracy to remain reliable. What’s more, with a IPX7 water resistance rating, you can ride into the depths of winter assured that your power meter will survive. Product Features: 800-hours battery life LED lights to indicate – on (green), zero offset (blue), and low battery (red) 3D Strain Gauge technology to deliver +/- 1% accuracy Slimmed down design that fits virtually every frame Three-year warranty IPX7 water resistance rating Weighs only nine grams Backwards compatible with current Precision Drive Side Powermeter Active temperate compensation Over the air feature and firmware upgradability Coin cell battery operated (CR2032) Compatible with 3rd party training apps such as Zwift, TrainerRoad, SYSTM, and more Specifications: Accuracy: +/- 1% Battery Type: CR2032 Coin Cell Battery Life: 800 Hours Waterproof Rating: Ipx7 Cadence Range: 30-170 RPM Power Range: 0-4000 Watts Length: 63.79mm Width: 26.42mm Height: 5.5mm Weight: 9g Operating Temperature: 0 to 50°C Storage Temperature: -40 to 60°C Communication Protocols: ANT+, Bluetooth®
Top of the range, high performance Dura-Ace wireless hydraulic Servo Wave disc brake Di2 STI's give you control, modulation and power with minimal effort in all riding conditions 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 Wireless connectivity to the front and rear derailleurs for effortless trouble free gear shifts Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt 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 with Servo Wave technology provides excellent stopping power with less effort especially from the hood position 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 Free stroke adjustment for pad to rotor contact setting Levers use CR1632 batteries which last for approximately 1.5-2 years Ports for use with SD300 E-tube electric cables Kit contains left hand bled ST-R9270 STI, BR-R9270 flat mount brake calliper with pads, hoses and mineral oil (without rotors or adapters)
Top of the range, high performance Dura-Ace hydraulic disc brake Di2 TT STI's give you control, modulation and power with minimal effort in all riding conditions 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 removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts Full synchronized shifting programable, Synchro shift compatible meaning a single shifter button either side can control both front and rear shifting which can be fully custom tuned to your riding preferences TT STI with one shift button each side Shifters are lightweight thanks to carbon fibre lever blades and carbon composite bracket body Hydraulic brake lever provides excellent stopping power with less effort especially from the hood position 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 Free stroke adjustment for pad to rotor contact setting Levers are supplied without electrical cables, as these need to be ordered separately to suit
Top of the range, high performance Dura-Ace hydraulic disc brake Di2 TT STI's give you control, modulation and power with minimal effort in all riding conditions 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 removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts Full synchronized shifting programable, Synchro shift compatible meaning a single shifter button either side can control both front and rear shifting which can be fully custom tuned to your riding preferences TT STI with one shift button each side Shifters are lightweight thanks to carbon fibre lever blades and carbon composite bracket body Hydraulic brake lever provides excellent stopping power with less effort especially from the hood position 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 Free stroke adjustment for pad to rotor contact setting Levers are supplied without electrical cables, as these need to be ordered separately to suit
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 Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt Drop bar STI with shift buttons located in a near identical place to the positions you'd assume shifting using a mechanical Shimano STI Servo Wave brake lever pivot is positioned to be used with super SLR brake callipers, increase power providing excellent ergonomics when riding on the hoods Finely tuneable reach adjusters for the levers enable custom fitment for all hands Wired connection to the front and rear derailleurs with SD300 series wires
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 Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt Drop bar STI with shift buttons located in a near identical place to the positions you'd assume shifting using a mechanical Shimano STI Servo Wave brake lever pivot is positioned to be used with super SLR brake callipers, increase power providing excellent ergonomics when riding on the hoods Finely tuneable reach adjusters for the levers enable custom fitment for all hands Wired connection to the front and rear derailleurs with SD300 series wires
Top of the range, high performance Dura-Ace wireless hydraulic Servo Wave disc brake Di2 STI's give you control, modulation and power with minimal effort in all riding conditions 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 Wireless connectivity to the front and rear derailleurs for effortless trouble free gear shifts Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt 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 with Servo Wave technology provides excellent stopping power with less effort especially from the hood position 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 Free stroke adjustment for pad to rotor contact setting Levers use CR1632 batteries which last for approximately 1.5-2 years Ports for use with SD300 E-tube electric cables
Top of the range SLR-EV dual symmetric pivot calliper brake with quick linear response, increased rigidity, and improved braking power Enhanced brake arch proportions give a quicker linear response and increased power Better clearance with wider tyres, compatible with 28C tyre size Titanium centre pivot bolt for light weight Thrust bearings and coated bushings between arms for smooth linear feel and increased durability Brake pad compound offers excellent stopping power under wet and dry conditions, with improved durability Spring tension adjuster for precision setup Adjustable toe-in on the brake shoes for easy setting up
Top of the range SLR-EV dual symmetric pivot calliper brake with quick linear response, increased rigidity, and improved braking power Enhanced brake arch proportions give a quicker linear response and increased power Better clearance with wider tyres, compatible with 28C tyre size Titanium centre pivot bolt for light weight Thrust bearings and coated bushings between arms for smooth linear feel and increased durability Brake pad compound offers excellent stopping power under wet and dry conditions, with improved durability Spring tension adjuster for precision setup Adjustable toe-in on the brake shoes for easy setting up
Top of the range, high performance Dura-Ace low profile hydraulic road disc brake for efficient braking in all conditions Front wheel use for flat mount forks with adapter to flip between 140 and 160 mm Oversized 22mm ceramic pistons optimized for heat insulation, lightweight and stiffness Opposed 2-piston design reduces leading effect and optimal pad wear Improved pad to rotor clearance with 10% increase pad clearance over BR-B9170 reduces the chance of rotor drag Direct flat mount and open design allows easy and quick wheel replacement Forged calliper design is lightweight and rigid One way internal fluid circuit makes bleeding easy Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid Shim-less mounting bracket allows for quick installation and setting up Recommended for use with Ice Tech FREEZA Center Lock SM-MT900 rotors for optimum braking performance Comes complete with resin compound aluminium radiation fin pad further improves heat dissipation reducing brake surface temperature by 50 deg C Inline hose routing for low profile design Separate bleed port and valve screw for improved bleeding process
Top of the range, high performance Dura-Ace low profile hydraulic road disc brake for efficient braking in all conditions Front wheel use for flat mount forks with adapter to flip between 140 and 160 mm Oversized 22mm ceramic pistons optimized for heat insulation, lightweight and stiffness Opposed 2-piston design reduces leading effect and optimal pad wear Improved pad to rotor clearance with 10% increase pad clearance over BR-B9170 reduces the chance of rotor drag Direct flat mount and open design allows easy and quick wheel replacement Forged calliper design is lightweight and rigid One way internal fluid circuit makes bleeding easy Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid Shim-less mounting bracket allows for quick installation and setting up Recommended for use with Ice Tech FREEZA Center Lock SM-MT900 rotors for optimum braking performance Comes complete with resin compound aluminium radiation fin pad further improves heat dissipation reducing brake surface temperature by 50 deg C Inline hose routing for low profile design Separate bleed port and valve screw for improved bleeding process
The HollowTech II 12-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite riders Hollow outer chainring, giving vast improvements in rigidity and increased weight savings The hollow outer chainring has essentially removed outer chainring flex, hugely improving shift performance making it precise even under high load These industry leading HollowTech II 4 arm cold forged hollow crank arms have been evolved to increase rigidity, reduce weight, and improve strength The teeth have been developed to work only in conjunction with the 12-speed chains for improved contact providing more efficiency and improved power transfer There is a wide range of chainring ratios and crank arm lengths available enabling customisation for all riders and racing disciplines HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability