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

There's obviously a reason that SRM sell for more, but I can't really be bothered enough to research into why

First to market. Everybody who came after has to persuade people not to get an SRM, and being cheaper has been the easiest route.

Sigma are doing PT G3 hubs for £329, still more than Paligap store on eBay, but probably easier to return if needing to use the warranty

Sigma are doing PT G3 hubs for £329

I've got one (Ant+ only) I wanna sell. Laced to a 32h Mavic Open Sport - £200 posted
Fresh NDS bearing gone in, new freehub fitted, and battery cover removal tool, QR and a few extra coin batteries also supplied.

Nah he’s right. It’s worth £500 really.

Srm aren’t what they used to be. P2m are better now than the base srm.

And the pc7 headunit is worthless. Not even useful as a paperweight.

Really? I find it hard to believe it’s only worth £500 now. That’s a quarter of it’s original retail value. Every second hand SRM I’ve searched for recently is at least £750-£800 and most are about £1000-£1200 still.

Anyway, here’s some pics if anyone is interested in purchasing. There are some normal wear marks, mainly to the logo on the NDS arm. I have done a quick clean on them since I removed them, but they will scrub up better with a bit more care and attention. I’d go as low as £700 for the lot here, which I still think is good value for one of the best power meters out there.

170mm S975 crank arms. GXP axle (I can throw in a GXP British threaded bottom bracket if needed). Rings are 53/39 and have more life than I originally thought left in them. There’s a speed and cadence sensor as well as the PC7 too.

I’ll throw it on eBay and take my chances later this week if there’s no takers.

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But what are they selling for?

I’ve not been following them long enough to find out.

https://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=srm&LH_Complete=1&LH_Sold=1&rt=nc&_trksid=p2045573.m1684

Fair enough. There seems to have been some people getting bargains on there recently.

People who need an SRM buy a new unused SRM.

People who are happy to buy used PMs will buy whatever is best value and fits their bike and looks nice.

That GXP SRM will only fit certain bikes, only match certain set ups and only appeal to people looking for 130BCD. The red sticker is challenging too but it can be changed - at a price.

If price is dictated by supply and demand there’s just lots of supply because it’s competing against everything - even new stages / vector / whatever in a limited market of people looking for PMs that work with a Sram set up.

Remember - you can fit a Rotor PM if you have a Shimano set up but you can’t fit SRAM because Tarquin on the club run will think you are odd.

So the demand is weak.

Sell the PC7 sperately - you might get £70 for it.

The old SRMs were still valued by track sprinters as they are more accurate for peak power measurements. I think it was the wired ones that made sense for them as the wire units lacked any transmit lag the wireless ones suffered from. Not sure if this is still the case.

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Considering an NG eco to replace my ageing P2M classic. Any reason not to stick with 3D24? The classic has lasted me 4 years and I'd want to be relatively future proof.

Guess if Shimano are sticking with Hollowtech II there shouldn't be anything to worry about.

Any reason not to stick with 3D24?

With the exception of frames with BB86 shells, which I'd avoid on principle, 3D+ will go into anything which will also accommodate 3D24

I've seen a few things about 30mm bearings in a BSA shell being small and not durable. Assume this is hogwash.

What is the difference between 3D+ and "true" BB30? Supposedly BB30 isn't the correct length for BSA shells but 3D+ is? Trying to avoid spacers etc. at all costs.

I've seen a few things about 30mm bearings in a BSA shell being small and not durable. Assume this is hogwash

30mm bearings inside a 1.37" shell are small and utterly useless. The 3D+ is really a BB386EVO¹ design, so it uses external cups to fit 30mm bearings outside the shell. The bearings are then the same section as in a true BB30 or 386EVO (42mm bore) shell.

¹FSA claiming credit where none is due - Zipp Vuma cranks had these dimensions years before FSA came up with a marketing name for it.

I've seen a few things about 30mm bearings in a BSA shell being small and not durable.

The Rotor BSA30 bearings are fine. They're standard Bb30 bearings but outboard. I'd go with 3d+.

Would only need the P2M spider if I stuck with 3D24. Any real upsides to 3D+? Such wattage, etc.

Tiny bit lighter I think.

If you have the 3d24 I would stick with that tbh.

No. Just inconvenience trying to get a 30mm spindle in 24mm bb. Get the 24.

Any real upsides to 3D+?

None that make it worth ditching perfectly good 24mm cranks.

One reason for 3d24 is if you have internal di2 cables that need to get through the bb.

Selling my Quarq elsa 10R on ebay.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F113395217982

It it's on 'bay you cannot promote it here.