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

• drive train losses.
  
  

2 crank/pedal power meters would work. As they're registering the strain applied to the cranks.

there's a chain connecting the cranksets, so going crank-based surely neither would provide a clean value? (effort of b would affect reading at a)

Two sets of pedal power would work, but the pilot would need two garmin's to display the power meter of each power meter separately, enabling them to shout at the stoker whenever they weren't pulling their weight.

You would probably be best off using two heart rate monitors

^^ Not really. Setup each Garmin to display % of FTP and shout "80%" or "120" or "f*c#!ng 200%" etc.

Like skinny says with the right type of PM that's all good.

nah just have a garmin each - with the power meters synced to the "wrong" ones - that way either person can see when the other is slacking :)

I don't think this would matter if it's measured at crank (rather than chainring like the new powertap).

#notanexpert

Good to see we are all very busy at work this Friday afternoon...

I other news- my p2max arrived today. Much excitement.

This was one of the better discussions on the ride today....
Forgot to sync my P2m up before I left, was silly.

did you not enjoy having my massive numbers on your screen?

I turned off power at Lea Bridge...

buyer

Bite me

FYI my p2m issues with the battery dying fast seem to have been isolated to that battery. P2m sent me new batteries (fair play) and since then I've done 250ish hours on the battery. More than the 170 before it died last time. Both were same recommend battery.

They used to recommend only using a Swiss brand battery.

I bulk bought, and have only used one so far. Lasts ages.

@6pt you got wattage? This got coincidentally bumped.

https://groups.google.com/forum/m/#!topic/wattage/aJ_SHJPhsQs

Anyone in south/south east London got a 30mm rotor spider lockring tool I can borrow this weekend?

yeah i do actually. bought it with p2m

This? https://www.power2max.com/northamerica/product/accessories/lock-ring-tool-for-rotor-3df-and-3d-plus/

Edit- that's the one. Currently I have a pair of cranks and the spider - ideally I need two to become one.. None of my local bike shops seem to have the tool.

You about today?

AndyP also has one I believe.

Ditto on having one, if I can find it- will be around Putney in evening.
Will update when/if found (bout 1hr)

He's got mine, I pm'd him earlier.

Have P2M dropped their prices? Seems cheaper on their site to what i remember.

Andy only has the 24mm version. @skinny sorted me out #rep

Cranks and spider are now together. What's the recommended torque for that lockring?

Looks like it