One bike is Campy, One is Shimano. Now what do I do?

tvann

I really want to make the powermeter purchase but I have an issue. My road bike is Campy 9 speed and my tri-bike is Shimano 9 speed. Does anyone have this same issue and if so, what did you do? Thanks

Woofer

A straightforward thing to do is switch both bikes to use the same type of cranks. Then you could use either SRM or Ergomo. It's a much bigger nuisance to switch the Ergomo between bikes. It may much easier for you to buy a PowerTap with two wiring harnesses and two rear wheels, one for each bike. Whatever works better for you. If you do IMH you'll want a deep dish wheel with a cover for non-IMH events.

PSUcycling

I'm not sure exactly what the problem is...

I assume you want to be able to switch the crankset back and forth. If so, then just put the same BB in both frames. It doesn't matter if the BB is campy and the rest of the drive train is shimmy. There aren't any compatability problems...The crankset works with 8/9/10 speed shimano and campy, the only difference is the BB.

jmac

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jerryz

Hm...... powertaps (except for the sl) are shimano anyway. SO you need a differenct cassette to run it on you campy bike. I have a PT and and run campy on all my bikes.

Now the ergomo is in the BB so I don't see how that is more complex. just get 2 ergomo sensors and you are goos to go. I just bought an ergomo pro and have it on my new bike. I love it so much I'm selling my PT pro.

Woofer

I would consider it to be a terrible inconvenience to have to switch the cranks every time I wanted to ride a bike. Maybe the OP would not want that. Maybe they would not mind and use the same cranks/chainrings on both bikes.

I would consider switching the bottom brackets to share an Ergomo to be onerous. Maybe the OP would not.

And yes, I own a SRM that I switch between two bikes - for just fooling around I have a non SRM crank on one of the bikes that I take off and switch. A problem with this is the chainline issue - at least with the Campy taper version, Campy taper bottom brackets come in a very limited selection of lengths. Perhaps the Dura Ace SRM would work fine on both of the OP's bikes.

For less than the SRM the OP could buy two rear PowerTap wheels and one CPU and two wiring harnesses and just switch the CPU and rezero.

jerryz

With the ergomo why would you have to switch cranks? Thats the SRM deal. Once the ergomo BB is inplace just hook up th ecranks you want. Any brand. And you are good to go. So put an ergomo BB in each bike. I assume they have cranks right now.

Woofer

This is based on recollection of costs when it came out so changes in exchange rates and inflation and deflation ( or poor memory) would change these numbers slightly. The most expensive part of the ergomo last I heard was the bottom bracket at about $700. This would make two bottom brackets for two bikes a bit less than the SRM Pro. The overhaul cost for the Ergomo was $400 every 10000-20000 miles last I heard - can only be done in Germany unlike SRM which has a US office. The OP would have to make the cranks on each bike the same unless he went with two bottom bracket solution. My assumption was that no one would commit to the two bottom bracket solution until they really bought into the Ergomo power meter - at this cost point it becomes effectively the same as a buying a training PowerTap wheel and the most expensive PowerTap race wheel you could buy. If the OP does not live in the North America, service for PowerTap would then become a pain as shipping a wheel internationally is really expensive.

jerryz

I agree the costs are only a bit less for 2 bikes than an SRM pro. I just upgraded from the PT pro to the ergomo pro on one bike and liked it so much that I'm selling the PT and installing the ergomo on the other bike.

Woofer

Doh.

I just realized the OP may have different threading on his two frames' bottom brackets so he may have to buy two ergomo bottom brackets if he desires to go that route. We need more information about his bikes.

jerryz

That's my deal. One bike is Itallian threads and the other is English. For 2 BBs harnesses and one CPU total cost comes to about 2300. At that point 2 bikes are fully functional without ever having to make any mechanical changes to ride them.

PSUcycling

i just assumed he was talking about the srm, which I have, and would make my arguments valid. If you were talking about the PT or ergomo, then you will have to do somthing else.

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tvann

Woofer

Yes, you could go even cheaper and use one hub and use different cassettes but that nixes the convenience factor again.

Also, some people have a lot of trouble mounting the SRM on carbon fiber bikes with a big bottom bracket region, so dunno if you would have that issue.

tvann

Stupid question but here it goes - if I go the cheaper route with one hub, (forgetting the convenience factor for a moment), would my campy cassette work on this hub? Would I have to get a PT SL?