(dumb) wheel/cassette question

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2014-06-07 6:42 PM

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Subject: (dumb) wheel/cassette question
I ride with a powertap hub with shimano drivetrain. I'll be traveling to the in-laws next month, and I don't want to pack my bike. But I do plan to ride, and I don't want to miss the power data.

My father-in-law has an old 10 speed in the garage that I rode the last time I was there. I know I haven't provided much info, but is it generally possible to put any road wheel on any road bike? I'm guessing it's not possible, but if it is, I'll pack the wheel with me.

[Sorry for the dumb question!]

2014-06-07 7:13 PM
in reply to: mc_charles

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Subject: RE: (dumb) wheel/cassette question
If it's a 10 speed it will most likely fit, if it's a 8 or 9 speed like most "old" bikes then it won't.
Just have him count cassette and let you know what it is.
2014-06-07 7:31 PM
in reply to: mc_charles

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Subject: RE: (dumb) wheel/cassette question
Ok, that sort of defines obsessive. Take the powertap gear with you, it either will fit or it won't. Do a thorough check of the bike; tires, brakes, chain, etc. It may be fine for recreational riding, but you don't want to find out during a hard training ride that it has problems.
2014-06-07 9:58 PM
in reply to: vonschnapps

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Subject: RE: (dumb) wheel/cassette question
Triathletes are nothing if not obsessive, right?

Thank you both for the tips. I'll bring the wheel and see how it works.
2014-06-07 10:44 PM
in reply to: #5008794

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Subject: RE: (dumb) wheel/cassette question
If it's an 8 speed or 9 speed you should be able to put his cassette onto your wheel. 8/9/10 all fit onto the same freehub body.
2014-06-08 7:21 AM
in reply to: mc_charles

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Subject: RE: (dumb) wheel/cassette question
The answer will be no… The old "10 speed" bikes (which is truly a 5 speed) has a rear spacing of 126mm, modern bike use 130mm rear spacing. The change happened with Shimano 7 speed introduction (although the first 7 speed were 126mm, so be very careful with that).

Not only that, but you would need to have a cassette that lines up with the rear derailleur and the shifter (assuming indexable shifting), which basically means that you can only use your 10 speed cassette with a 10 speed rear derailleur and 10 speed shifters.

2014-06-08 7:54 AM
in reply to: audiojan

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Subject: RE: (dumb) wheel/cassette question
Originally posted by audiojan

The answer will be no… The old "10 speed" bikes (which is truly a 5 speed) has a rear spacing of 126mm, modern bike use 130mm rear spacing. The change happened with Shimano 7 speed introduction (although the first 7 speed were 126mm, so be very careful with that).

Not only that, but you would need to have a cassette that lines up with the rear derailleur and the shifter (assuming indexable shifting), which basically means that you can only use your 10 speed cassette with a 10 speed rear derailleur and 10 speed shifters.


+1, there is also the likelihood that the old bike has 27" wheel where your new powertap is probably on a 700C wheel. Not a huge amount of difference but you may or may not be able to adjust brakes to compensate for the slightly smaller diameter of the 700C.
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