Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Well I am a n MTB Stages user and have recently discovered I appear to have an Elite left leg and weekend warrior right leg. Whatever the cause there was a 50w difference vs powertap. Unfortunately that's considerably bugger than a 2% error.

considerably bugger

Indeed.

But is it consistent?

So that's your secret

Where does one acquire an elite left leg?

cannondale lefty

Stages users getting stressed about people who've "never used left leg only power meters before" probably don't even know about Ergomos back in the day. Everyone understood the limitations of left leg only meters back then, it's just the Team Sky fankids that don't want to hear it's a bad idea.

I've used all the major power meter players but even if I hadn't there are reams of data to show the inaccuracy of left leg only power data. Not the meters themselves, that's a separate issue and Stages are fine from a hardware point of view, it's the concept which is entirely incorrect at their current price point. It's not a budget option (same for Rotor one sided, Garmin etc), as they're not cheap enough for the massive hit in data quality.

Rant.

Heh

the concept which is entirely incorrect at their current price point.

This is Whole argument though. If you can find a Stages at a good price. I for one would jump on it. But currently they are just too short a step from 'absolute measurement'.

A mate has two bikes with different chainsets (BSA + BB30).
I can't see past a powertap hub being the least hassle and best value for money?

Chainset requries adapters
Crank arms aren't compatible
Pedals require different cleats and are 1 sided without spending big
Powertap is potentially restrictive on wheels

Vectors? lol

Those Powertap pedals are actually meant to be really good. No calibration or anything, just switch them over like normal pedals.

A friend had a similar problem: one power meter to be shared with two road bikes (HT II cranks) and one TT bike (BB30 and needing both race and training wheels).

A PT laced to an Archetype has proved a reasonable solution so far: the Archetype is fine for both the road bikes (occasional crits on one) and as a training wheel for the TT bike; with a Raltech disc cover it's also fine as a race wheel too.

The hard part has been the gearing as they're loath to swap cassettes, so one cassette needs to cover a compact double, a standard double and a TT single...

Rotor 3D+ will happily swap between BB30 and BSA, just pull the left hand crank arm off, remove, add or remove the 11mm spacers (literally large plastic washers), put on the other bike.

Not that I would choose to do it often myself, but then I don't share wheelsets between bikes either.

Interesting, shame the price rules that out, could probably get a Powertap or p2m per bike instead.

I've recommended a powertap on a 24 or 28h Archetype as a race day and training compromise. Of course the correct answer is always 1 power meter per bike.

I'm planning on buying a Power2Max with a Rotor crank and swopping it between BBRight bike and BSA bike, nice to know it seems relatively easy enough. Will probably only need to swop it twice a year (summer/winter)

DC Rainmaker was quite impressed by the PowerPod: http://www.dcrainmaker.com/2015/08/first-powerpod-power.html

Not in production yet, and no L/R balance obviously, but the non-DFPM (Direct Force Power Meters) are going to be interesting to follow.

That's a good benefit, but they are super massive and the stack height is 7mm or something insane. For training swapping bike to bike they're great, personally I've funded the Brim Brothers Kickstarter as that looks perfect for my needs (multiple Speedplay equipped track bikes)

You heard it here first...

Xav in Kickstarter PM endorsement shocker

Isn't the Brim Brothers the one that's had lots of fulfillment problems?

I am looking to get a single leg ultegra pioneer power meter.
Has anyone had any experience with the pioneer range?
Would it fit and tiagra 4650 crankset?

Nah that's Limits

am looking to get a single leg...

Obvious troll is obvious...

Would it fit and tiagra 4650 cranks

Yes, you can fix an Ultegra left crank to a 4650 axle.

But is it consistent?

Hard to tell on one comparison but it appeared to track the powertap plus 40W from from 125-180W (PT) and be 50W for the 30 minute FTP test.

It's worked OK for training and pacing. Pricepoint for me is helped by the fact I swap between bikes