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

The thing about having a coach, is you have to hand yourself over to them and trust them 100% and just believe they know best. If you have ANY doubt, then you should talk to them openly if you're not happy.

I disagree with my coach a bit, but we talk and come to an agreement and then I do what he says.

20W isn't that much. Say it was 300W that's only 6.7%, and given a power meter, if you have n SRM is only 2% accurate. You're only 4% off at best. Maybe you were having a bad day, or a very good day the other day. Who knows without knowing your training.

Don't compare indoor trainer watts and 'real' riding watts. Riding conditions, temp, motivation and muscle recruitment all different.

I'm happy if I can do 90% of my best outdoor numbers on a turbo.

I do mainly sprint stuff indoors. Theres no logical reason for this other than my low boredom threshold.

I used to look at my 5, 10, and 20 second maxs and think how cool it would be to have the balance, and focus, to do the same figures outside.

Then I fitted the P2M, and in 2 rides I've added a few hundred watts to each max outside.

That said. I still plan to use my 20 min turbo test to monitor FTP. It may be less representative, but it involves a load less varibles.

@adoubletap In this cases all rides I'm talking about were done outside. The FTP testing was done on one of the local 10mile TT courses that runs basically past my front door.

@skinny Yeah, I know and I do trust my coach - she's been excellent and I went back to the same person after going 6months without a coach. Still, no one's perfect and I've trusted her on something that worked out badly in the past so I like to try and keep informed of what is going on and why... hence the internet oppinionz.

She says to try the use the numbers from the test over the weekend and we'll talk about it on Monday... which I'll do.

Still numbers or levels are only a guide, and if you feel it's too low, push. Or if it's too hard, go easier.

Consistency is king.

Right, question for the power2max owners running a Rotor crankset. How did you remove the spider on the Rotors? I've got the lockring tool but it won't budge. Is there a secret method?

I've swapped an SRM spider over between a few Rotor 3D+ arms.

I clamped the arm (teatowel over my work-mate, clamped between the leaves), then used my "big" torque wrench, and gave it some beans.

I disagree with my coach a bit, but we talk and come to an agreement and then I do what he says.

Ha! Mostly this.

I wrapped the crank arm in masking tape, put it in a vice with rubber soft jaws, and used a 3 foot breaker bar on the removal tool. Came off no problem. Refitted it using a large torque wrench to the specified torque setting.

After you overcome the threadlock the lockring spins off quite easily.

Right, question for the power2max owners running a Rotor crankset. How did you remove the spider on the Rotors? I've got the lockring tool but it won't budge. Is there a secret method?

Epic Power.

Its basically threadlocked on. So it requires loads of force to free it. I used a massive spanner and a vice.

Warm it up with a hairdryer first to break the threadlock?

I've re-theadlocked my P2M on. So i hope I dont need to swap any time soon.

Epic Power used on a alu spider is one thing. On a expensive Power meter?

Warm it up with a hairdryer first to break the threadlock?

Do you think I own a hairdryer?

Will try Andrea's instead. I don't have a massive vice, unfortunately, so am hoping to get away without needing to resort to one.

You're welcome to pop over to mine, I have everything needed.

Thanks, Neil. I may well take you up on that, even if it does mean having to cycle up that damn hill.

Embrace the hill.

The thing about it is, that it doesn't look tough. Then about 2/3 of the way up, it dawns on me that it is.

It gets steeper at that point- that's where (when we had snow) people had to abandon their cars as the wheels just span.

Useful though. Good visitor deterrent.

Come next winter I'll be mooring my boat to the roundabout, I've already been to pick out "my" tree.

http://www.bikerumor.com/2014/03/25/measure-your-power-and-change-your-own-batteries-with-srms-new-fsa-bb386-ucb/

AAs - I like it. Now, they just need to make it similar in price to the P2M and I might buy it.

Could go in the GPS thread I guess...

Click on Examples>Ted King (some of the others don't work)
http://www.suffervision.com/

AA batterys are Heavy :(

People worry about a few grams like it matters!!

Until you look ethiopian i'd never worry.

But yes, 4000h seems un-needed, trying to match current life when batteries are replaceable is not needed.