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

Its in the 'nice but pricey thread'

Can you link?

Trying to fit a Stages Rival crank arm onto a SRAM S300 Courier crank.

The original courier LH arm tightens by hand.
The Rival still has play when hand tightened.

I need to buy a 1/2 inch socket set for my torque wrench tomorrow.
I don't want to go ape with it now but it strikes me as odd.

Could I be missing something? I've only ever handled the S300 but maybe this is normal for other SRAM chainsets and when I get a big torque wrench on it, it'll be fine(?).

maybe this is normal for other SRAM chainsets

It is. The spline should be an interference fit, so it should take a reasonable amount of torque to drive it home. The instructions say 48-54Nm, and also suggest that even 54Nm may not get it all the way home (where it traps the NDS bearing and eliminates end float) at the first attempt.

^ this is basically 'fucking tight' with a reasonably long wrench.

Thanks, didn't want to go full tilt on it till I was sure. Will get a torque wrench on it tomorrow.

Anyone done a bearing replacement on the wheelbuilder Powertap Track SL+ ?

I looked, it's apparently similar to the road SL+ but in the end, took it to my local shop.

Ta :) Did they send it back to Saris or did they do it themselves?

If the later, how much and where?

As it was just bearings they did it themselves, it was £57.50 @ Sigma Sport in Kingston for parts and labour.

Paligap are the official service partner in the UK, who charge £52 + parts + initial postage.
http://powertap.paligapltd.co.uk/service.php

I might use Paligap next time as it'll probably need a good once over.

Here's a video for doing the work on the road version.
https://www.youtube.com/watch?v=fS_BL1b2wns

Excellent, thanks.

Sigma are charging a lot for that if it just a case of tapping the axle out then drifting the DS bearing out.

But I guess you are paying for insurance too.

Most likely gonna take plunge on 4iiii single side because cheaper than stages and shimano 6800 option (already on both of my bikes). Anyone has first hand experience? Any pitfalls?

I will be using it for 6 months to train, do an event and sell after.

Why bother?

because power .. I've learnt how my HR works since I am sans-PM for a bit now but would be good to be slightly more accurate.

And why bother with single sided?

its cheap (and shimano) .. the ROI on accuracy is OK with single sided IMO.

I can get Pioneer dual but I don't see any point for such a short term usage.

^^

If you're gonna PM, PM properly

He just wants some numbers to look at

Spend £400 on beer instead

He just wants some numbers to look at

Opposite of that, just want to use it as a 'tool' to train for alps trip and then get rid .. MVP. I will lose more than £100 on pioneer dual sided I think when I sell, 4iiii maybe £100.

If its an absolute waste of money (single sided, 4iiii) then I might just use HR.

To quote yourself

" I don't really care that much about fitness/numbers etc."

gonna care in short term ;) then sell/switch to HR. But if its absolutely not worth it then just HR.

Also, welcome to the power meter thread, people will tell you anything other than a spider/bb or hub based one is shit.

Why bother. You don't need a power meter for that. An hour of effort is an hour of effort. You can do that kind of training just as well on HR.

If you're going to sell it anyway, just go double sided. Vectors or whatever if you don't want to change your cranks. Unless you pedal at the same L/R variance for every single second of your ride, the data from a left-only is going to be inherently wrong. What's the point in that?