Skip to content
  • 💸 Big savings + free shipping 💸
  • 💸 Big savings + free shipping 💸
Lifeline ShopLifeline Shop
    • No products in the cart.

      Return to shop

  • Cart

    No products in the cart.

    Return to shop

  • Components
    • Derailleurs
    • Headsets
    • Handlebars
    • Pedals
    • Saddles
    • Seatposts
    • Brakes
    • Stems
    • Brake Pads
    • Cassettes
    • Cranksets
    • Gear Shifters
    • Bottom Brackets
    • Chains
    • Grips
  • Wheels & Tyres
    • Wheels
    • Tyres
    • Hubs
    • Tubes
    • Rims
    • Tubeless Kits
    • Quick Releases
    • Rim Tape
    • Spokes
    • Valve Caps
    • Nipples
  • Frames & Forks
    • Frame Spares
    • Forks
    • MTB Frames
    • Frame Protection
    • Road Frames
    • BMX Frames
    • Cyclo-X Frames
  • Accessories
    • Bags
    • Lights
    • Sunglasses
    • Pumps
    • Hydration Packs
    • Bike Racks
    • Mudguards
    • Locks
    • Water Bottles
    • Water Bottle Cages
    • Miscellaneous
    • Computers
    • Pannier Racks
    • Helmet Cameras
    • Child Seats
Components / Power Meters
Sale!
4iiii Precision XT M8100 Left Arm Powermeter

4iiii Precision XT M8100 Left Arm Powermeter

$348.99 Original price was: $348.99.$98.99Current price is: $98.99.

Clear
SKU: prod209651 Categories: Components, Power Meters Tag: 4iiii
  • Your satisfaction is 100% guaranteed.
  • Safe Payments, Happy Customers
  • 7 Days of Hassle-Free Returns
  • Peace of Mind with Every Purchase
Browse
  • Accessories
    • Bags
    • Baskets
    • Bells
    • Bike Covers
    • Bike Racks
    • Child Seats
    • Computers
    • Cycle Mirrors
    • First Aid Kits
    • Gift Vouchers
    • Helmet Cameras
    • Hydration Packs
    • Keyrings
    • Lights
    • Locks
    • Miscellaneous
    • Mudguards
    • Mugs & Glasses
    • Number Plates & Numbers
    • Pannier Racks
    • Pumps
    • Sunglasses
    • Watches
    • Water Bottle Cages
    • Water Bottles
  • Components
    • Bar End Plugs
    • Bar Ends
    • Bash Guards
    • BMX Seats
    • Bottom Brackets
    • Brake Cables
    • Brake Levers
    • Brake Pads
    • Brake Spares
    • Brakes
    • Cassettes
    • Chain Guides
    • Chain Tugs
    • Chainring Bolts
    • Chainrings
    • Chains
    • Crank Bolts
    • Cranksets
    • Derailleurs
    • Gear Cables
    • Gear Shifters
    • Grips
    • Groupsets
    • Handlebar Tape
    • Handlebars
    • Headset Spacers
    • Headsets
    • Pedals
    • Pegs
    • Power Meters
    • Rear Shock Springs
    • Rear Shocks
    • Saddles
    • Seatclamps
    • Seatposts
    • Stems
  • Frames & Forks
    • BMX Frames
    • Cyclo-X Frames
    • Forks
    • Frame Protection
    • Frame Spares
    • MTB Frames
    • Road Frames
  • Uncategorized
  • Wheels & Tyres
    • Hubs
    • Nipples
    • Quick Releases
    • Rim Tape
    • Rims
    • Spokes
    • Tubeless Kits
    • Tubes
    • Tyres
    • Valve Caps
    • Wheels
  • Description
  • Additional information
  • Reviews (0)

4iiii Precision XT M8100 Left Arm Powermeter

Specifically designed for road cycling and gravel adventure riding, this powermeter is engineered for reliable results, whether you’re preparing for your next event or want to beat personal performance goals. Coming housed within a Shimano XT M8100 left-sided crankarm, it offers straightforward installation when pairing it with your crankset. 4iiii has also equipped this model with technologies including 3D Power Measurement, Dual Channel ANT+ and Bluetooth Smart wireless connectivity as well as an industry-leading +/- 1% accuracy. This makes it a perfect choice for a wide range of performance-focused riders who want to improve their game and boost their training routine.

Used to pace attacks up the Alpe D’Huez in the Tour de France and to hammer on the Queen K during the Ironman World Championships, the Precision Powermeter delivers industry-leading accuracy and reliability when you need it most. Through 4iiii’s patented 3D Strain Gauge technology, you can be assured that the data you depend on will help lead you to your own Yellow Jersey.

Packaged into a durable lightweight design and compatible with ANT+ and Bluetooth Smart headunits, Precision will help you train harder and smarter.

A Ride Ready Precision includes and comes preinstalled on a brand-new Shimano XT M8100 left-sided crank arm. This crank arm will fit bottom brackets using the Hollowtech II interface.

Features:

  • Use: Mountain Bike (MTB)
  • Crankset Compatibility: Shimano XT M8100
  • Accuracy: +/- 1%
  • Connectivity: Dual Channel ANT+ and Bluetooth Smart
  • 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)
  • Single or Pair: Single left arm powermeter only
  • Module Weight: 9g (0.3oz)

Technologies:

  • 3D Power Measurement: When you put force through your pedals or crank, it doesn’t just bend the crank – it twists and flexes in all 3 dimensions. 4iiii’s patented 3D power measurement system measures this multidimensional strain, so you can be confident that your unique pedal stroke is still measured accurately no matter your riding conditions.
  • Industry Leading Accuracy: 4iiii’s +/- 1% accuracy isn’t just a claim, it’s been third party tested and validated by leading scientists and the Locomotion Lab at the University of Colorado. You can plan your training, pacing, and racing with confidence knowing that your data is always going to be consistent. Don’t limit your potential with unreliable data. Want to learn more? Read the whole whitepaper!
  • Dual Channel ANT+ and Bluetooth Smart: 4iiii Powermeters communicate their measurements over both the widely-used ANT+ and Bluetooth Smart radio standards, letting you read and record your power numbers on an enormous catalog of headunits, sportswatches, smartphones, and computers.
  • Communication 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.
  • Indoor Training: If the weather or climate make riding outdoors tough, your 4iiii Precision powermeter can be used with all popular indoor-training apps, such as Zwift, TrainerRoad, TheSufferFest, Rouvy, and more. Simply use your favourite app’s connection procedure over ANT+ or Bluetooth Smart, put your bike on a trainer, and get riding!
  • 3 Year Manufacturer’s Warranty: 4iiii Powermeters are waterproof, durable, and designed to be accurate and precise even in the harshest conditions. Because of this, 4iiii are happy to offer an industry-leading 3-year warranty. Ridden through rain storms at Strade Bianche, mud filled cross country mountain bike races, and even tested amidst the salt spray of the ocean on Oracle Team USA’s America’s Cup competitors, you can be assured that your 4iiii Powermeter will be as tough as you are and is backed with an industry-leading 3-year warranty. All 4iiii Powermeters are IPX7-rated for water immersion up to one meter and backed with an industry-leading 3-year warranty.
  • In The Box: Once your ride-ready Precision powermeter arrives, it just needs to be installed on your bike using the standard Shimano crank installation process. Connect a headunit or computer, and you can start riding with power!

Manufacturer’s Part Numbers:

  • PML100-S5B00A Black 170mm
  • PML100-S5D00A Black 175mm

Buy 4iiii Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.

Select Colour

Black

Select Length

170mm, 175mm

Reviews

There are no reviews yet.

Be the first to review “4iiii Precision XT M8100 Left Arm Powermeter” Cancel reply

Related products

Sale!
Shimano Disc Brake Hose
Quick View

Brake Spares

Shimano Disc Brake Hose

$26.99 Original price was: $26.99.$18.89Current price is: $18.89.
Sale!
Sixpack Racing Sixpack Pedal Seal
Quick View

Components

Sixpack Racing Sixpack Pedal Seal

$1.49 Original price was: $1.49.$1.04Current price is: $1.04.
Sale!
TA Chinook 4-Arm MTB Outer Chainring
Quick View

Components

TA Chinook 4-Arm MTB Outer Chainring

$47.99 Original price was: $47.99.$33.59Current price is: $33.59.
Sale!
Spank Spoon Grom Kids Bike Grips
Quick View

Components

Spank Spoon Grom Kids Bike Grips

$14.99 Original price was: $14.99.$10.49Current price is: $10.49.
Sale!
CeramicSpeed T45 SRAM DUB Bottom Bracket
Quick View

Bottom Brackets

CeramicSpeed T45 SRAM DUB Bottom Bracket

$321.99 Original price was: $321.99.$99.99Current price is: $99.99.
Sale!
Nukeproof Jockey Wheels For Shimano - SRAM
Quick View

Components

Nukeproof Jockey Wheels For Shimano – SRAM

$19.99 Original price was: $19.99.$13.99Current price is: $13.99.
Sale!
Kool-stop Kool Stop Eagle 2 Dual Compound Brake Pads
Quick View

Components

Kool-stop Kool Stop Eagle 2 Dual Compound Brake Pads

$9.99 Original price was: $9.99.$6.99Current price is: $6.99.
Sale!
Shimano Deore RT-54 Centre-Lock Disc Brake Rotor
Quick View

Components

Shimano Deore RT-54 Centre-Lock Disc Brake Rotor

$11.99 Original price was: $11.99.$8.39Current price is: $8.39.
LEGAL
  • Privacy Policy
  • Shipping Policy
  • FAQ
  • Returns & Exchanges
  • Term and Conditions
CUSTOMER SERVICE
  • My account
  • Delivery
  • Payment Method
  • Contact Us
  • About Us
Signup for Newsletter

Sign up for exclusive offers, original stories, events and more.

    Products
    • FSA Alloy Mountain Bike Bash Ring FSA Alloy Mountain Bike Bash Ring $2.99 Original price was: $2.99.$2.09Current price is: $2.09.
    • Race Face Light Mountain Bike Bash Ring Race Face Light Mountain Bike Bash Ring $37.99 Original price was: $37.99.$26.59Current price is: $26.59.
    Copyright 2026 © www.cheapbikepartsshop.com
    • Components
      • Derailleurs
      • Headsets
      • Handlebars
      • Pedals
      • Saddles
      • Seatposts
      • Brakes
      • Stems
      • Brake Pads
      • Cassettes
      • Cranksets
      • Gear Shifters
      • Bottom Brackets
      • Chains
      • Grips
    • Wheels & Tyres
      • Wheels
      • Tyres
      • Hubs
      • Tubes
      • Rims
      • Tubeless Kits
      • Quick Releases
      • Rim Tape
      • Spokes
      • Valve Caps
      • Nipples
    • Frames & Forks
      • Frame Spares
      • Forks
      • MTB Frames
      • Frame Protection
      • Road Frames
      • BMX Frames
      • Cyclo-X Frames
    • Accessories
      • Bags
      • Lights
      • Sunglasses
      • Pumps
      • Hydration Packs
      • Bike Racks
      • Mudguards
      • Locks
      • Water Bottles
      • Water Bottle Cages
      • Miscellaneous
      • Computers
      • Pannier Racks
      • Helmet Cameras
      • Child Seats
    • Login

    Login

    Lost your password?

    Register

    Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.