4iiii Ultegra R8000 Crank Arm w/PRECISION Power Meter Black Left Sided
 (1).jpg?sw=1500&sh=1500&sm=fit "4iiii Ultegra R8000 Crank Arm w/PRECISION Power Meter Black Left Sided")
-2.jpg?sw=1500&sh=1500&sm=fit "4iiii Ultegra R8000 Crank Arm w/PRECISION Power Meter Black Left Sided")
4iiii Ultegra R8000 Crank Arm w/PRECISION Power Meter Black Left Sided
- Select size and colour for availability
The Details
Durable, lightweight and incredibly precise, the 4iiii Ultegra R8000 Crank Arm with PRECISION Power Meter Black Left Sided measures tri-axial strain to get a 3D view of where the power is going
Whether you’re a pro or simply training hard, PRECISION powermeters deliver industry-leading accuracy, highly dependable cadence data, 3D powermeter technology capable of measuring tri-axial strain on your crank arm. Designed to be durable and lightweight, compatible with ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.
PRECISION Ride Ready comes installed on a new Shimano left crank arm (105, Ultegra, or Dura-Ace). These crank arms will fit bottom brackets using the Hollowtech ii interface.
NOTE: check your frame clearance before ordering by downloading and printing the compatibility guide:https://4iiii.com/wp-content/uploads/2017/02/Ride-Ready-Clearance-Check-Letter-20170215.pdf
Features
3D powermeter technology (patent pending) measures tri-axial strain on your crank arm
Accurate, consistent data
Lightweight, compact design
Display Compatibility:
4iiii PRECISION power meters use both the ANT+ PWR and Bluetooth Smart Cycling Power Service standards, which makes them compatible with nearly every headunit, smartphone, or computer you wish to connect to. Check your recording device documentation for ANT+ PWR or Bluetooth Smart (also called BLE, BTLE, or BT4.0) Cycling Power Service capability.Stealth 50
Our Verdict
Durable, lightweight and incredibly precise, the 4iiii Ultegra R8000 Crank Arm with PRECISION Power Meter Black Left Sided measures tri-axial strain to get a 3D view of where the power is going
Industry Reviews
Key Specifications
- Battery status indicator via 4iiii app
- Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
- User-friendly app and configurable rider compensation scale factor
- Easy setup and maintenance
- Specifications
- Weight: 9 grams
- Data accuracy: +/- 1% error margin
- Battery life: 100+ riding hours on 2032 coin cell battery
- Module Weight: 9g (0.3oz)
- Power Range: 0-4000W
- Cadence Range: 30-150RPM
- Communication Protocols: ANT+, Bluetooth
- Operating Temperature: 0 to 50°C (32-122°F)
- Storage Temperature: -20 to 50°C (4-122°F)
- Battery Type: CR2032 lithium ion coin cell
- Battery Life: 100+ hours
- Waterproof Rating: IPX7, IPX5
- Length: 37.7mm (1.5in)
- Width: 27.6mm (1.1in)
- Depth: 7.5mm (0.3in)
Delivery
Parts, accessories and clothing delivery - FREE over £30
Delivery for parts, accessories and clothing is free over £30 and £2.99 below that. We have a selection of premium delivery services available, including next day, AM, Saturday, timed delivery and local pickup services. Mainland UK only, some remote and off-shore areas or areas of Scotland may incur a surcharge. Delivery options and lead time estimates will be provided in checkout.
Click & Collect
Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.
Reviews
Your Questions Answered
Durable, lightweight and incredibly precise, the 4iiii Ultegra R8000 Crank Arm with PRECISION Power Meter Black Left Sided measures tri-axial strain to get a 3D view of where the power is going
Whether you’re a pro or simply training hard, PRECISION powermeters deliver industry-leading accuracy, highly dependable cadence data, 3D powermeter technology capable of measuring tri-axial strain on your crank arm. Designed to be durable and lightweight, compatible with ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.
PRECISION Ride Ready comes installed on a new Shimano left crank arm (105, Ultegra, or Dura-Ace). These crank arms will fit bottom brackets using the Hollowtech ii interface.
NOTE: check your frame clearance before ordering by downloading and printing the compatibility guide:https://4iiii.com/wp-content/uploads/2017/02/Ride-Ready-Clearance-Check-Letter-20170215.pdf
Features
3D powermeter technology (patent pending) measures tri-axial strain on your crank arm
Accurate, consistent data
Lightweight, compact design
Display Compatibility:
4iiii PRECISION power meters use both the ANT+ PWR and Bluetooth Smart Cycling Power Service standards, which makes them compatible with nearly every headunit, smartphone, or computer you wish to connect to. Check your recording device documentation for ANT+ PWR or Bluetooth Smart (also called BLE, BTLE, or BT4.0) Cycling Power Service capability.Stealth 50
- Battery status indicator via 4iiii app
- Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
- User-friendly app and configurable rider compensation scale factor
- Easy setup and maintenance
- Specifications
- Weight: 9 grams
- Data accuracy: +/- 1% error margin
- Battery life: 100+ riding hours on 2032 coin cell battery
- Module Weight: 9g (0.3oz)
- Power Range: 0-4000W
- Cadence Range: 30-150RPM
- Communication Protocols: ANT+, Bluetooth
- Operating Temperature: 0 to 50°C (32-122°F)
- Storage Temperature: -20 to 50°C (4-122°F)
- Battery Type: CR2032 lithium ion coin cell
- Battery Life: 100+ hours
- Waterproof Rating: IPX7, IPX5
- Length: 37.7mm (1.5in)
- Width: 27.6mm (1.1in)
- Depth: 7.5mm (0.3in)
Durable, lightweight and incredibly precise, the 4iiii Ultegra R8000 Crank Arm with PRECISION Power Meter Black Left Sided measures tri-axial strain to get a 3D view of where the power is going
Parts, accessories and clothing delivery - FREE over £30
Delivery for parts, accessories and clothing is free over £30 and £2.99 below that. We have a selection of premium delivery services available, including next day, AM, Saturday, timed delivery and local pickup services. Mainland UK only, some remote and off-shore areas or areas of Scotland may incur a surcharge. Delivery options and lead time estimates will be provided in checkout.
Click & Collect
Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.
Finance your purchase with us today and spread the cost.
Need some help? Speak to our sales team
All of our finance options are available online with no deposit, however if you would like to pay a deposit then you can speak to our helpful sales team who will arrange this and process your application for you.
🔒NEW Security checks
In conjunction with Novuna, we have recently implemented additional security checks as part of our online finance process. These additional checks may require you to submit photo ID when placing a finance order, so remember to watch out for emails from Novuna which may request this additional information.
Available Finance Options
| Duration (months) | Interest Rate (p.a. fixed) | Monthly Payments | Amount of Credit | Total Repayable | Deferral period |
|---|---|---|---|---|---|
| 36 months | 16.9 % APR | £10.05 | £268.99 | £361.80 | 6 |
| 12 months | 9.9 % APR | £23.58 | £268.99 | £282.96 | 0.0 |
| 24 months | 9.9 % APR | £12.35 | £268.99 | £296.40 | 0.0 |
| 36 months | 9.9 % APR | £8.61 | £268.99 | £309.96 | 0.0 |
| 48 months | 9.9 % APR | £6.76 | £268.99 | £324.48 | 0.0 |
Finance representative examples
Find below representative examples for both 9.9%APR and 0%APR finance. Full details of available finance products can be found on individual product pages. Full details and T&Cs regarding our finance options can be found here.
| 12 months 0% APR representative | 48 months 9.9% APR representativee | |
| Price | £999.00 | £1788.00 |
| Advance Payment | £100.00 | £0.00 |
| Amount of Credit | £899.00 | £1788.00 |
| Interest Rate | 0% p.a. fixed | 9.9% p.a. fixed |
| Respresentative | 0%APR | 9.9%APR |
| Total Term | 12 months | 48 months |
| Payment Holiday | 0 months | 0 months |
| Monthly payments | 12 x £74.91 | 48 x £44.91 |
| Total Amount Payable | £898.92 | £2,115.68 |