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

hmmmm. Do I really want to spend 200 euro more for the S type?

Better battery placement.
No need for me to dremel.
Lighter

Am I missing something?

Disappointed there's no Campagnolo compatibility with Stages and P2M.

Just man up and buy the Campag SRM

dimi, you just bought ultegra di2 biek no?

Disappointed there's no Campagnolo compatibility with Stages and P2M.

Rather inherent in the design though. P2M only works with removable spiders, and Stages only works with ali cranks. While Campag does ali cranks, aren't they only on the pikey chainset options?

Campag makes a Super Record chainset that works with removable spiders- but only for SRM, at the ~£lots pricepoint, to keep themselves exclusive.

They refuse to supply other PM makers, is my understanding, as they only want to be associated with the best in the market.

SRM USA have announced a wired SRM amnesty.

Eight hundred dorrah discount on the purchase of a wireless upgrade.

Hmmmm....

Campag makes a Super Record chainset that works with removable spiders- but only for SRM, at the ~£lots pricepoint, to keep themselves exclusive.

They refuse to supply other PM makers, is my understanding, as they only want to be associated with the best in the market.

Ah, didn't know that. Presumably the cost of making very low-run removable spider chainsets is also pretty monumental, so it wouldn't make sense to sell such expensive cranks with the cheaper PMs.

SRM USA have announced a wired SRM amnesty.

Eight hundred dorrah discount on the purchase of a wireless upgrade.

Hmmmm....

Heh, they kind of had to as the wired ones are indestructible.

Ah, didn't know that. Presumably the cost of making very low-run removable spider chainsets is also pretty monumental, so it wouldn't make sense to sell such expensive cranks with the cheaper PMs.

I can;t recall now but I think SRM machine off the spider from 7900 cranks in order to offer the Dura Ace SRM, obviously that's not an attractive prospect with carbon fibre hence the need for Campag to make them itself.

Nah Shimano make em don't they? That's why there's a DA logo but, curiously, no shimano logo as 'its not a 100pc shimano product'

Campag are just determined in their drive to irrelevancy.

trollface.png

guys, I wonder if anyone can help here as I am bit stuck due to lack of knowledge and info on the stages website for my road bike. I bought a stages power crank arm for my SRAM red GXP BB30 but the Stages arm just won't fit!
I cannot figure out what is wrong from the Stages website and they have no support phone number.

If you look at the pics attached you will see that the crank arms look different, the stages one which is a GXP is smaller only requires a 8mm allen key to be installed whrereas my SRAM red one requires a 10mm. I am sure bought the wrong one but cannot figure out which one is the right one to buy. Hope someone knows better than I do

this is my chainset http://www.chainreactioncycles.com/sram-red-bb30-double-10sp-chainset/rp-prod36491?_$ja=tsid:46412|cgn:SRAM+-+Cranksets|cn:Chain+Reaction-UK-PLA-PLA-All-DT-SE|kw:369217UK_SRAM+Red+BB30+Double+10sp+Chainset&gclid=CJqinand37oCFSbHtAod6XcAuw

Any ideas please?

2 Attachments

BB30 is one type of Bottom Bracket
GXP is another.

Your bike is BB30. So your crank axel is BB30 which is 30mm wide. Not the 24mm wide that GXP is.

SO you need a BB30 stages arm.

Where did you buy it from? They really should have made sure you had the right thing.

Post a link of the stages you bought.

http://www.merlincycles.com/bike-shop/road-parts/transmission/power-meters/stages-power-sram-rival-gxp.html

thanks Skinny

thanks a lot for the explanation but I am still unclear which one I should buy...the BB30 model they say it is for mountain bike so that confuses me
http://www.stagescycling.com/stagespower-models#model_16

HMM. It doesn't seem to exist in bb30 form. For the road bike.
The X9 for mountain bike will work with BB30 crank, but they say t's for MTB, though I don't see why it wouldn't work for road.
http://www.cyclepowermeters.com/stages-sram-x9-gxp-2361-p.asp

You've defiantly the wrong one. You've a GXP only one.

You could buy a GXP Sram Red crankset and a BB30 to GXP bottom bracket and then use the crank arm you have. Though that's a work around. I'd avoid this option. In desire of keeping BB30 and getting a differnt powermeter.

Thanks again Skinny...I was also coming to the same conclusion..that it does not exist...BUT...how can it be? They clearly say it is compatible with red but not with a BB30?...weird. I am really upset.and disappointed...I stupidly did not check before hand and they did not ask me either :| Now if the MTB one does nor fit (and I guess I have no other way of finding that out than a message to stages) I am even more stuck than before.

The lack of a road BB30 arm is certainly odd- as Skinny says I would think that you could use the MTB one, although I'd check Q factor before ordering.

Otherwise, again as Skinny goes on to say you might have to use an adapter to run a GXP crankset, but that seems to be a very backward thing to have to do.

Had you considered buying a Power2Max instead?

In other news, I've just placed an order for an Ultegra 6800 Stages.

yes, I have considered P2M but then went for Stages as £100 cheaper for SRAM, minimal additional weight to the bike and easier to install. I imagined at least.

In other news, I've just placed an order for an Ultegra 6800 Stages.

UK retailer or personal US import?

If you plan to sell that stages let me know fab!
#profitingfromothersmisfortune

The lack of a road BB30 arm is certainly odd- as Skinny says I would think that you could use the MTB one, although I'd check Q factor

Well if you think about it...SRAM never made a rival crank in bb30...

Actually... Maybe they did. Or maybe something similar but non-series. Hmmm weird.

Mixing mtb / road is possible - may not even mean a wider Q factor, if like most bb30 cranks accounting for the extra girth required for mtb cranks is achieved via a longer axle and spacers.

2nd dibs erroneous rival crank arm.

hehe..I'd sell it with a £10 discount wich is probably what it would cost me to send it back to the seller for a full refund. So £590...cheaper price on the net.

I have emailed stages and waiting for an answer but in the meantime I wonder if something like this would solve my issue:
http://www.cyclepowermeters.com/bb30-to-sram-gxp-bottom-bracket-adapter-1199-p.asp?gclid=CN-lv6iS4LoCFfLHtAodx2gAiA
I assume I would have to use the shims on both sides?