4iiii precision power meter, my experience
- Alex Simmons/RST
- Expert
- Posts: 4997
- Joined: Fri May 02, 2008 3:51 pm
- Contact:
Re: 4iiii precision power meter, my experience
Postby Alex Simmons/RST » Fri Dec 23, 2016 4:17 pm
Of course if you have not done this before, don't as there are inherit dangers in doing such efforts if you don't know what you are doing or have equipment suitable for the demands involved!
- biker jk
- Posts: 7001
- Joined: Tue Nov 17, 2009 6:18 pm
- Location: Sydney
Re: 4iiii precision power meter, my experience
Postby biker jk » Fri Dec 23, 2016 5:55 pm
Here's DC Rainmaker's review.Alex Simmons/RST wrote:Any like to post some data? One data quality test I like to see is a maximal effort power and cadence data from a standing start, or at least from a very slow rolling pace. Need to capture the initial 6-8 or so seconds of data.
Of course if you have not done this before, don't as there are inherit dangers in doing such efforts if you don't know what you are doing or have equipment suitable for the demands involved!
https://www.dcrainmaker.com/2015/12/4ii ... eview.html
Conclusion: it takes the KOM for the least expensive direct force power meter on the market – and one that’s just as accurate and easy to use as ones that cost significantly more.
- Alex Simmons/RST
- Expert
- Posts: 4997
- Joined: Fri May 02, 2008 3:51 pm
- Contact:
Re: 4iiii precision power meter, my experience
Postby Alex Simmons/RST » Sat Dec 24, 2016 5:58 am
DCR doesn't do the sort of tests I'm talking about - indeed I've spoken with him about including them in his testing protocol.biker jk wrote:Here's DC Rainmaker's review.Alex Simmons/RST wrote:Any like to post some data? One data quality test I like to see is a maximal effort power and cadence data from a standing start, or at least from a very slow rolling pace. Need to capture the initial 6-8 or so seconds of data.
Of course if you have not done this before, don't as there are inherit dangers in doing such efforts if you don't know what you are doing or have equipment suitable for the demands involved!
https://www.dcrainmaker.com/2015/12/4ii ... eview.html
Conclusion: it takes the KOM for the least expensive direct force power meter on the market – and one that’s just as accurate and easy to use as ones that cost significantly more.
It's actually quite a simple test yet it's very telling about a meter's capabilities (and the head unit's too) since the shape of the resulting pedal force-pedal velocity plot can be compared with the known P-V plot for human performance that's been well established in the scientific literature. It amazes me that it's not done.
Put it this way, if you do any sort of riding that involves an acceleration or rapid changes in pace, time spent on/off pedalling, then you'll want to know. This describes most mass start races and many other group ride scenarios.
Other than DCR, I've never seen data from a 4iii, hence asking for a sample or three.
-
- Posts: 738
- Joined: Thu Jun 06, 2013 10:40 pm
Re: 4iiii precision power meter, my experience
Postby defy1 » Tue Jan 10, 2017 9:26 am
- biker jk
- Posts: 7001
- Joined: Tue Nov 17, 2009 6:18 pm
- Location: Sydney
Re: 4iiii precision power meter, my experience
Postby biker jk » Tue Jan 10, 2017 9:50 am
Only when I'm not pedaling.defy1 wrote:Anyone have issues with power dips to zero on their 4iiii?
-
- Posts: 738
- Joined: Thu Jun 06, 2013 10:40 pm
Re: 4iiii precision power meter, my experience
Postby defy1 » Tue Jan 10, 2017 12:21 pm
Can you compare your profile for a ride to this?biker jk wrote:Only when I'm not pedaling.defy1 wrote:Anyone have issues with power dips to zero on their 4iiii?
- biker jk
- Posts: 7001
- Joined: Tue Nov 17, 2009 6:18 pm
- Location: Sydney
Re: 4iiii precision power meter, my experience
Postby biker jk » Tue Jan 10, 2017 12:41 pm
No. Clearly a problem there.defy1 wrote:Can you compare your profile for a ride to this?biker jk wrote:Only when I'm not pedaling.defy1 wrote:Anyone have issues with power dips to zero on their 4iiii?
-
- Posts: 1
- Joined: Sat Mar 25, 2017 8:32 pm
Re: 4iiii precision power meter, my experience
Postby Alf K » Sat Mar 25, 2017 8:41 pm
I also have a 4iiii with problems. Put it on the bike on Monday, worked fine on the Wednesday ride, On Saturday's ride failed after 18km. First started to drop out and now no power data at all. Cadence still works.defy1 wrote:Can you compare your profile for a ride to this?biker jk wrote:Only when I'm not pedaling.defy1 wrote:Anyone have issues with power dips to zero on their 4iiii?
Did you get your problem sorted out?
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Thu Jan 11, 2018 8:23 am
- panosk
- Posts: 84
- Joined: Wed Jan 14, 2015 12:20 pm
Re: 4iiii precision power meter, my experience
Postby panosk » Thu Jan 11, 2018 11:42 am
Still happy after 2.5 years of almost daily use.lewie15 wrote:Are people still happy with their 4iiii power meters?
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Thu Jan 11, 2018 11:57 am
Good to hear!panosk wrote:Still happy after 2.5 years of almost daily use.lewie15 wrote:Are people still happy with their 4iiii power meters?
-
- Posts: 738
- Joined: Thu Jun 06, 2013 10:40 pm
Re: 4iiii precision power meter, my experience
Postby defy1 » Thu Jan 11, 2018 1:09 pm
yes new battery and reset and it was fixed. also had new firmware updateAlf K wrote:I also have a 4iiii with problems. Put it on the bike on Monday, worked fine on the Wednesday ride, On Saturday's ride failed after 18km. First started to drop out and now no power data at all. Cadence still works.defy1 wrote:Can you compare your profile for a ride to this?biker jk wrote:
Only when I'm not pedaling.
Did you get your problem sorted out?
-
- Posts: 738
- Joined: Thu Jun 06, 2013 10:40 pm
Re: 4iiii precision power meter, my experience
Postby defy1 » Thu Jan 11, 2018 1:10 pm
yes bought 2016 from Precision direct, and happy with it. Support is good also.lewie15 wrote:Are people still happy with their 4iiii power meters? It's hard to find too many people online having bad things to say about them, which must be a positive. I've changed my mind a number of times about which power meter to get. Originally I was going to go with Stages ($599), but got talked out of that. Then I moved my thinking towards a pedal based system and looked at the new vectors and P1's. Not sure I really need dual power though and I like my current pedals. I'm now leaning towards the 4iiii single sided system and will probably order through Pushy's rather than send my own crank away. Pushy's are selling them for $749, but I will wait until another 12% off sale and use a gift card I have, which will bring the price down to around $550.
-
- Posts: 219
- Joined: Wed Dec 02, 2015 10:38 am
- Location: Brisbane
Re: 4iiii precision power meter, my experience
Postby adam0bmx0 » Thu Jan 11, 2018 2:17 pm
-
- Posts: 17
- Joined: Mon Jan 08, 2018 7:12 pm
Re: 4iiii precision power meter, my experience
Postby sammutd88 » Thu Jan 11, 2018 3:32 pm
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Thu Jan 11, 2018 3:48 pm
- MichaelB
- Posts: 14775
- Joined: Tue Feb 20, 2007 9:29 am
- Location: Adelaide, South Australia
Re: 4iiii precision power meter, my experience
Postby MichaelB » Thu Jan 11, 2018 4:28 pm
Just curious
-
- Posts: 17
- Joined: Mon Jan 08, 2018 7:12 pm
Re: 4iiii precision power meter, my experience
Postby sammutd88 » Thu Jan 11, 2018 4:33 pm
-
- Posts: 738
- Joined: Thu Jun 06, 2013 10:40 pm
Re: 4iiii precision power meter, my experience
Postby defy1 » Fri Jan 12, 2018 9:21 am
-
- Posts: 219
- Joined: Wed Dec 02, 2015 10:38 am
- Location: Brisbane
Re: 4iiii precision power meter, my experience
Postby adam0bmx0 » Fri Jan 12, 2018 12:23 pm
I did do a TT late last year as part of a multi-stage race series, and used average 3 sec power to keep at a certain avg power I knew I could hold for the length of the TT course.
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Fri Nov 30, 2018 10:12 pm
The other option is buying an Ultegra 6800 crank through Merlin with the 4iiii pre-installed. Works out to be $550 including GST and also includes Precision's Viiiiva heart rate which retails for $120, as a bonus. I don't really care that the Ultegra 6800 doesn't match the rest of my Ultegra 8000 crankset, so leaning towards this option, with the possibility of making some money back through the selling of the heart rate monitor.
The $749 RRP for the pre-installed single sided power meter seems like highway robbery if you ask me. A few other specials around, which i've thought about - Favero Assiomos Duo's for $999 and Pioneer dual sided for $699. These dual sided options offer far greater value than the Precision, but I have built up trust with my 4iiii and wouldn't be a bad thing to have the same PM on both bikes for the consistency of numbers.
- kb
- Posts: 2570
- Joined: Sun Nov 13, 2011 3:22 pm
Re: 4iiii precision power meter, my experience
Postby kb » Wed Dec 05, 2018 9:39 am
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Sun Dec 16, 2018 2:09 pm
4iiii Utegra 6800 power meter on special at Pushy's. Looks like it's only 172.5 cranks. I just bought another one for my gravel bike. Have had one on my road bike for the past year and its been great.
- g-boaf
- Posts: 21318
- Joined: Mon Sep 26, 2011 6:11 pm
Re: 4iiii precision power meter, my experience
Postby g-boaf » Mon Jan 07, 2019 6:53 pm
Interesting to know. I'm in the market for a new power meter, my DA9000 Stages version 1 (the version with the changed O-ring, it breaks the battery compartment cover lugs all the time) is going stupid. It also runs out the battery in two days almost.lewie15 wrote:https://www.pushys.com.au/4iiii-precisi ... 2-5mm.html
4iiii Utegra 6800 power meter on special at Pushy's. Looks like it's only 172.5 cranks. I just bought another one for my gravel bike. Have had one on my road bike for the past year and its been great.
Initially thinking of going Pioneer and just one side (DA9000 crank) which would be cheaper, or a DA9100 172.5 dual sided setup with the whole entire crankset.
Only know that it won't be another Stages. The stages I have is actually a warranty replacement one for the original that only worked for a tiny amount of time.
-
- Posts: 73
- Joined: Tue Mar 15, 2016 8:30 pm
Re: 4iiii precision power meter, my experience
Postby lewie15 » Mon Jan 14, 2019 10:02 pm
Return to “Buying a bike / parts”
- General Australian Cycling Topics
- Info / announcements
- Buying a bike / parts
- General Cycling Discussion
- The Bike Shed
- Cycling Health
- Cycling Safety and Advocacy
- Women's Cycling
- Bike & Gear Reviews
- Cycling Trade
- Stolen Bikes
- Bicycle FAQs
- Serious Biking
- Audax / Randonneuring
- Retro biking
- Commuting
- MTB
- Recumbents
- Fixed Gear/ Single Speed
- Track
- Electric Bicycles
- Cyclocross and Gravel Grinding
- Dragsters / Lowriders / Cruisers
- Children's Bikes
- Cargo Bikes and Utility Cycling
- Road Racing
- Road Biking
- Training
- Time Trial
- Triathlon
- International and National Tours and Events
- Cycle Touring
- Touring Australia
- Touring Overseas
- Touring Bikes and Equipment
- Australia
- Western Australia
- New South Wales
- Queensland
- South Australia
- Victoria
- ACT
- Tasmania
- Northern Territory
- Country & Regional
- The Market Place
- Member to Member Bike and Gear Sales
- Want to Buy, Group Buy, Swap
- My Bikes or Gear Elsewhere
- Cycling Brands
- Cannondale
- Garmin
- Giant
- Shimano
- Trek
Who is online
Users browsing this forum: No registered users
- All times are UTC+11:00
- Top
- Delete cookies
About the Australian Cycling Forums
The Australian Cycling Forums is a welcoming community where you can ask questions and talk about the type of bikes and cycling topics you like.
Bicycles Network Australia
Forum Information
Connect with BNA
This website uses affiliate links to retail platforms including ebay, amazon, proviz and ribble.