SKU: 91929373629

4iiii - Left Side Precision 3+ Ultegra R8100 Power Meter

Sale price$418.45 Regular price$464.95
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Ships within 48 hours · Estimated delivery Aug 6 - Aug 11

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Description

4iiii - Left Side Precision 3+ Ultegra R8100 Power Meter4iiii LEFT SIDE PRECISION 3+ ULTEGRA R8100 POWER METER Our most powerful unit to date, compressed into a smaller, lighter package and featuring support for Apple Find My, the PRECISION 3+ Powermeter is a proven choice of pros and weekend warriors alike. Whether youre fighting for a Kona qualification spot, logging countless hours on virtual riding platforms or looking to better your time up the local KOM segment, you want accurate and reliable tools

4iiii - LEFT SIDE PRECISION 3+ ULTEGRA R8100 POWER METER 

Our most powerful unit to date, compressed into a smaller, lighter package and featuring support for Apple Find My, the PRECISION 3+ Powermeter is a proven choice of pros and weekend warriors alike. Whether you’re fighting for a Kona qualification spot, logging countless hours on virtual riding platforms or looking to better your time up the local KOM segment, you want accurate and reliable tools to unlock your potential. With up to 800 hours of battery life, an automatic terrain selector, +/-1% accuracy and backed by our industry-leading 3-year warranty, the PRECISION 3+ Powermeter will be your trusted tool for years to come.

 

  • APPLE FIND MY: Offering the peace of mind in knowing where your power meter is.

  • BATTERY LIFE: With up to 800 hours of battery life, you won’t have to worry about changing your battery for years to come.

  • ACCURACY IN 3D: Not everyone has the perfect pedal stroke. With +/- 1% accuracy, 4iiii is the only crank-based power meter to use 3 strain gauges to measure all forces in your pedal stroke.

  • AUTOMATIC TERRAIN SELECTOR: Detects the terrain you’re riding on for more responsive cadence and power feedback/data. Ride the roads less traveled with confidence.

  • ULTRA LOW PROFILE: With an ultra low profile design, the PRECISION 3 is compatible with more bike frames than ever before.

  • LIGHT WEIGHT: At only 9 grams the Precision 3 Powermeter weighs about the same as a sip from your water bottle. Our goal is to help you get faster, not to slow you down.

  • WATERPROOF: Designed to work in our tough environment. With an IPX7 waterproof rating you can be assured that your power meter can handle the toughest conditions.

  • 3 YEAR WARRANTY: A lot can happen in 3 years. You probably won’t need to use it, but it’s reassuring to know that all 4iiii power meters are backed by an industry leading 3-year warranty.

 

Product status indication LED light - for wake up (green), zero offset (blue) and low battery (red)

Patented 3D strain gauge technology to deliver +/-1% accuracy 

Ultra slim design to fit almost every frame

Active temperature compensation

Over the air feature and firmware upgradability

Coin cell battery powered (CR2032)

Compatible with 3rd party training apps such as Zwift, TrainerRoad, SYSTM and more

Waterproof rating: IPx7

Cadence range: 30 - 170 rpm

Power range: 0 - 4000w

Length: 63.79mm

Width: 26.42mm

Height: 5.5mm

Operating temperature: 0 to 50°C 

Communication protocol: ANT+, Bluetooth

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91929373629

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4.6 ★★★★★
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K
Verified Purchase
Ky Mogg
Boise, US
★★★★★ 5
Solid, grippy, and they don’t roll away!
Style: 10 Pound, Pair
I bought these because I’m finally trying to build a consistent home workout routine and didn't want to drop a fortune on name-brand weights. I’ve been using this 10lb pair for about a month now for everything from overhead presses to lunges, and honestly, they’re exactly what I was looking for. The Pros: • That Neoprene Grip: The coating is fantastic. Even when my hands get pretty sweaty halfway through a workout, I don’t feel like I’m going to drop them. It’s a much "softer" feel than cold metal or hard plastic. • The Hex Shape: This is a small detail that makes a huge difference. Since the ends are hexagonal, they don't roll across the floor when I set them down between sets. They also stay put if I’m using them for "renegade rows" or floor work. • Compact Size: They aren’t bulky. I can easily shove them under my bed or in the corner of the closet when I’m done. • No Weird Odor: I was worried they might smell like a tire factory (which happens with some rubber-coated weights), but these had almost no scent right out of the box. The Cons: • Handle Diameter: The handles are a little on the thicker side. I have medium-sized hands and it’s fine, but if you have very small hands, they might feel a bit chunky to wrap your fingers all the way around. • Color Scuffs: The navy blue looks great, but if you clank them together or drop them on concrete, the coating can scuff or show dust pretty easily. The Verdict: If you just need a reliable set of weights for HIIT, Pilates, or general strength training, these are a no-brainer. You're basically getting gym-quality equipment for a fraction of the price. I’ll probably be back for the 15lb set in a few months!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026
P
Verified Purchase
pac
Chelsea, US
★★★★★ 5
Worth its weight in gold
Color: Ocean Blue, Style: Everyday 3 Season 50-80° F
Great, left the wind & cold out. Kept me warm with 17* wind chill! Durable. Couldn’t have asked for better warmth made sitting @ watching a soccer game doable. It’s literally lite weight, has a convenient of a carrying bag.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
C
Verified Purchase
Chantal
Waukegan, US
★★★★★ 5
Great sleeping bag
Color: Ocean Blue, Style: Everyday 3 Season 50-80° F
Great size for my 10 year old son. Nice and long. The material is soft and warm. The zipper zips fast. There is like a hoodie on the top to go over your head to keep you warm.
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Reviewed in the United States on April 29, 2026
I
Verified Purchase
Irina Korsakova
Belleville, US
★★★★★ 4
Great for school trips and camping
Color: Sunburst Orange, Style: Everyday 3 Season 50-80° F, Color: Sunburst Orange, Style: Everyday 3 Season 50-80° F
My daughter went on a school camp trip and needed a sleeping bag, so I decided to get this one. I chose the adult size instead of the kids’ version so we can use it in the future too. It turned out to be a great choice — it’s roomy and comfortable, and even I fit inside easily. The material feels soft and pleasant to the touch, and the zipper works smoothly without getting stuck. It keeps you warm at night but doesn’t feel too hot, which is perfect for cool-weather camping. I did notice that along the edges there’s a section without insulation for quite a bit of distance — not a big issue, but something to be aware of. I tried to show this part in my video. The color is bright and cheerful, exactly as shown in the pictures. Overall, I’m very happy with this purchase — it’s lightweight, cozy, and easy to use. The only challenge is rolling it up and fitting it back into the carrying bag. Even for me, it took some effort since the sleeping bag is quite bulky. The material seems sturdy and well-made, but we’ve only used it once, so time will tell about its durability. Maybe the manufacturer could improve that part in the future. Still, it’s a great option for school trips, camping, and sleepovers.
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Reviewed in the United States on November 5, 2025
R
Verified Purchase
Romona
Carnegie, US
★★★★★ 5
Warm, comfortable, and great value for the price
Color: Ocean Blue, Style: Everyday 3 Season 50-80° F
I bought this sleeping bag for my son on a recent camping trip, and it performed surprisingly well. It warms up quickly once you’re inside, and the material feels soft and comfortable against the skin. The zipper runs smoothly and doesn’t get stuck easily, which is a big plus. It’s lightweight and packs down small, so it’s easy to carry and doesn’t take much space in his backpack. However, It’s not warm enough for very cold nights below the temperature rating, so if you’re camping in winter, you may need an extra blanket or liner. Overall, for the price, this sleeping bag is an excellent buy—comfortable, warm, and very practical. I would like to give five stars.
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Reviewed in the United States on January 21, 2026

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