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Thread: 27" on 700c

  1. #1
    Senior Member wtgrantham's Avatar
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    27" on 700c

    Are there any issues with running a 27" wheelset on a frame built for 700c as long as there is clearance?

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    higher bottom bracket, brakes

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    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Nope.

    The bike will sit a few mm higher and this will affect the handling a little... brakes will need room to slide the pads up or new brakes will be needed.

    Finding tyres won't be as easy as it is with 700c wheels as the selection is far more limited.

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    AEO
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    but why would you want to use 27" instead of 700c?
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

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    Senior Member wtgrantham's Avatar
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    I have 3 sets of 27" wheels and was hoping to use one of them rather than having to buy another set or rims to rebuild.

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    AEO
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    good enough reason for me.

    it's not that different compared to using a larger/fatter tire on the wheel, and assuming the frame has clearance for 27", it was probably built with fatter tires in mind.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

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    bike whisperer Kimmo's Avatar
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    The biggest issue is that you'll have to search high and low for even half-decent tyres.

    You may even need to discover some NOS to avoid having to fit something really crappy.

  8. #8
    me have long head tube TallRider's Avatar
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    I've had no problem finding fine tires for 27". But, I live in the U.S., which may have more of a market, and the bikes on which I run 27" wheels aren't my nicest bikes - I'm just looking for something durable and not too heavy.

  9. #9
    BeaverTerror Yan's Avatar
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    You'll need to move your brake pads up by 4mm. If your brakes allow this and your frame has clearance for the tires you want to run, you'll be fine. If you have horizontal dropouts, push the wheel all the way to the rear for a bit of additional clearance.
    Yan

    2013 True North custom touring; 2010 Novara Randonee; 2009 Unicycle.com Club 24"; 1989 Miele Tivoli; 1979 Colnago Sport

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    me have long head tube TallRider's Avatar
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    the 4mm difference in brake pad placement comes from 700c rims having 622m diameter, and 27" rims having 630mm diameter. 8mm diameter difference = 4mm radius difference.

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