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  1. #1
    Beicwyr Hapus Gerryattrick's Avatar
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    Double question - Campagnolo cassette plus tyre compatibility

    I'm planning on building up a road bike and have been offeyred some stuff for the build inc. modern Tiagra groupset and a pair of older wheels in great condition - Campagnolo Record hubs & cassette/Mavic CXP30 rims

    Question 1. Are there any compatibility issues with Shimano mechs/shifters & Campagnolo cassettes.

    Question 2. Can I fit 700x28c tyres on 622-13 rims. It's just outside Sheldon's recommended sizes, but I understand there is some room for manoeuvre with sizes.

  2. #2
    Senior Member Homebrew01's Avatar
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    1) I think you will need a Jtek "Shiftmate" .
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

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    Campy / Shimano incompatibility is not a good way to start a build. Choose your brand and stick with it.

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    Senior Member woodcraft's Avatar
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    Wouldn't the compatibility issues be between shifters & derailleurs, & not between derailleurs and cassette?

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    Quote Originally Posted by woodcraft View Post
    Wouldn't the compatibility issues be between shifters & derailleurs, & not between derailleurs and cassette?
    In an indexed shifting system the distance the deraileur moves is a combination of the shifter's pull ratio and the dérailleur's actuation ratio. One variable is as important as the other.

    http://en.wikibooks.org/wiki/Bicycle...ing_Dimensions
    Last edited by Al1943; 08-19-14 at 03:15 PM.

  6. #6
    Low car diet JiveTurkey's Avatar
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    Quote Originally Posted by woodcraft View Post
    Wouldn't the compatibility issues be between shifters & derailleurs, & not between derailleurs and cassette?
    Unfortunately, center-to-center cog spacing and overall cassette widths differ between the makes. For Campagnolo 10- and 11-speed, the c-c spacing even varies.

    Sheldon Brown's Bicycle Frame and Cassette Spacing Crib Sheet
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    Senior Member Dfrost's Avatar
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    Quote Originally Posted by Gerryattrick View Post
    Question 2. Can I fit 700x28c tyres on 622-13 rims. It's just outside Sheldon's recommended sizes, but I understand there is some room for manoeuvre with sizes.
    Yes, 700x28 tires can be used on narrow rims. I'm using that tire size on Mavic Open Pro rims ATM with great success. The only situation is that it helps to have two brake QR so that the caliper opens far enough to get the inflated tire through the brake. I use Shimano calipers and Campagnolo levers, and there's a QR on each. Alternatively, some Tektro calipers open wider with just the caliper QR.

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    It may be possible to replace the freehub part of the Campy hub with a Shimano compatible freehub without having to rebuild the rear wheel. To see is this is possible contact the hub manufacturer with the hub's serial number. If the rear hub is Campy contact Branford bikes.

    A word of tire size caution. Some road bike frames will not accept 28 mm tires due to the geometry of the rear triangle. In some cases the chainstays are so short that a 28 or even a 25 mm tire will not clear the chainstay / bottom bracket joint. When you have your frame you can test for this by borrowing a friend's rear wheel.

  9. #9
    Beicwyr Hapus Gerryattrick's Avatar
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    Thanks. I want to keep things simple so it looks like I'll avoid using the Campagnolo/Mavic wheels and stick with wheels with a Shimano freehub & cassette. Pity, they look good, but the complete Tiagra groupset is almost new (and free).

    Luckily the frame I have in mind does have adequate clearance for 28c tyres.

  10. #10
    Packfodding 3 caloso's Avatar
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    I have a Miche 10-speed cassette that fits on a Shimano-splined freehub but has Campy spacing. I believe they have one that goes the other way around, which is what you'd need.
    Cyclists of the world, unite! You have nothing to lube but your chains!

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    Quote Originally Posted by Gerryattrick View Post
    Thanks. I want to keep things simple so it looks like I'll avoid using the Campagnolo/Mavic wheels and stick with wheels with a Shimano freehub & cassette. Pity, they look good, but the complete Tiagra groupset is almost new (and free).

    Luckily the frame I have in mind does have adequate clearance for 28c tyres.
    Depending on the position of the drillings for the brakes, you may also have clearance issues with 28s under the brake arches - a narrow rim allows the tyres to "balloon" more so they end up higher profile and wider than they would on a wider rim ... if you can I'd do a dry run before committing too far, it might be a plan. We tried to run 28s on some of team bikes we were involved with on a Pave ride earlier in the year - loads of room on the frame, damn' all on the (Shimano Ultegra) brakes ...

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    It really depends how many sprockets you have and how well you want it to shift.

    In practical terms, service wheels get jammed into bikes and the 10s Campag cassettes will work in the mid-range OK with 10s Shimano systems and vice versa.

    If you are prepared to put up with relatively poor shifts at the extremities and quite a bit of careful set-up and are familiar with the job, then both hybrids can work just about tolerably (well, I guess that depends on your definition of "tolerable" - I wouldn't do it but I have been press-ganged into "making it work" for others) but as others have stated, you really are best sticking with one system - then shifting will be as slick as you like and there will never be doubt in your mind ...

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