power meters

[MistaDee]

To start with maybe but over time the pedal based system has more potential to wear .

The gold standard crank based power meter SRM are recommend to have a recalibration when they are having the battery replaced. All power meters will increase margin of error over time without calibration. Wear is not an issue which is documented extensively

 

[Cuchilo]

I think that over-states the effect of pulling up (if that's what you meant). It accounts for very little of the force through the pedals.

No , the way it was explained to me was that not all of the power you put out is in one direction . Linear , that's what a pedal based system reads . Any pressure or power out of that one direction is lost and will also add wear making it worse over time . This information was from someone that worked designing power meters among other things .
If the information is wrong then i'm more than happy for it to be corrected as i am still looking at power meters myself . From what i have heard stages crank based would be the safest long term buy .

 

[T.M.H.N.E.T]

I agree with Stages

 

[jamma]

I heard Stages were about issues but that could have been the last version. I have seen rotor 2 in power and the left crank version which are BB

 

[Cuchilo]

Wear is not an issue which is documented extensively

Documented where ?

 

[Cuchilo]

I heard Stages were about thinnicky but that could have been the last version. I have seen rotor 2 in power and the left crank version which are BB

I don't know what you said so i googled thinnicky , i wish i hadn't as i'm eating dinner .

 

[jamma]

I don't know what you said so i googled thinnicky , i wish i hadn't as i'm eating dinner .

I don't even want to know myself i'll edit to put issues

 

[T.M.H.N.E.T]

There was 1 issue with the early stages and that was the battery door leaking. The G2 version has rectified this

 

[S-Express]

No , the way it was explained to me was that not all of the power you put out is in one direction . Linear , that's what a pedal based system reads . Any pressure or power out of that one direction is lost and will also add wear making it worse over time . This information was from someone that worked designing power meters among other things .

Like I said previously, the majority of power is produced in a 'linear' fashion (by pusing down on the pedal), so any power generated through the bottom of the stroke, or through pulling up will be negligible anyway. I'm still not sure I fully understand what you mean and I've never seen any reference to such issues in tests anyway.

 

[Tin Pot]

Is there any difference from a dual sided one and a left crank only apart from the obivious reasons i.e: 1-2% discrepency, left crank power meter doubles reading for right crank


And before anyone starts with you don't need one or why are you buying one. I am not just wanting to see what other reasons behind both powermeters apart from the obivious ones.

You need to have context - no power meter is particularly accurate, I think most will admit to a 5% margin of error industry insiders hint that it can be much wider.

The point is not the accuracy, but the consistency, of the power meter. As long as you are getting consistent information, it doesn't matter how much the reading is out by.

 

[Cuchilo]

I don't even want to know myself i'll edit to put issues

From what ive heard from people that use them everything other than what they have bought has issues . Hence my comment earlier that they are all crap . People like to look after their investment so you need to remember that when getting advice . There's not many people that will admit to spending 1k on something that doesn't work very well .

 

[jamma]

From what ive heard from people that use them everything other than what they have bought has issues . Hence my comment earlier that they are all crap . People like to look after their investment so you need to remember that when getting advice . There's not many people that will admit to spending 1k on something that doesn't work very well .

That reply was to do with what you googled not on powermeters

 

[Cuchilo]

Like I said previously, the majority of power is produced in a 'linear' fashion (by pusing down on the pedal), so any power generated through the bottom of the stroke, or through pulling up will be negligible anyway. I'm still not sure I fully understand what you mean and I've never seen any reference to such issues in tests anyway.

I guess the only test that would show what i've been told is if a crank or BB system showed more power than a pedal based system on the same rider in the same conditions etc .

 

[S-Express]

I guess the only test that would show what i've been told is if a crank or BB system showed more power than a pedal based system on the same rider in the same conditions etc .

Such a comparison would probably result in different readings for all those different systems anyway (as pointed out elsewhere in the thread), so that would not prove anything unfortunately.

 

[huwsparky]

I have the G2 Stages, been fine for me other than dodgy battery life in the colder/wet months. Never got anywhere near the claimed 200hours and probably closer to 15 hours in some cases in the winter. Last battery lasted some 100 hours at least. Other than that ive never had an issue with its consistency of data. I know lots of people have had issues with multiple stages PM's but thankfully mine seems to be fine.

Used to replace batteries with Duracell but cheapo's seem to last just as well and only takes literally 1minute to change so overall I'm happy with mine. Not really bothered about spending 25p on a new battery maybe on average 10 times a year even though in theory I shouldn't have to.