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  1. #1
    Senior Member boscatman's Avatar
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    Tire height problem!!! Rubbing on frame!!!

    Ok, I took the reccommendations of a few people and bought some 700 x 28c Gatorskins for a new build. I inflated them to 110 psi. I installed the front tire onto the bike and notice that the front wheel rubbed on the brake arms ever so slightly. As I hadn't yet installed the STI I think that will be ok, because when I draw the brake arms in toward the rim the arm raises slightly to allow clearance. However, the back is a problem. The tire rubs on the frame!!! Is there such a thing as a frame that will only allow a certain height of tire? I am stumped!!!
    2003 Motobecane Sprintour
    Easton Vista wheels
    Continental Ultra Gatorskins 700 x 28c
    I chose that size because I am 275 lbs and ride on semi rough roads.
    Thanks for any help.

  2. #2
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    1st things 1st, are you absolutly sure the wheel is properly seated in the dropouts ?

  3. #3
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    Yes, some road frames intended for racing or serious sports riding have very close tire clearances and won't accept any tire larger than 25 or even 23 mm. A 700x28 that is a "real" 28 won't fit them. I recall some of the early Kestrel EMS forks that wouldn't even clear a 700x25.

  4. #4
    Senior Member boscatman's Avatar
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    I just installed them again just to make sure. Yes, they are seated correctly on the front and back. Thanks,
    Well the Sprintour is a higher model for Motobecane.
    I tried to take a picture but it it very difficult to capture that minute gap.

  5. #5
    Klaatu barada nikto cascade168's Avatar
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    Quote Originally Posted by boscatman
    Ok, I took the reccommendations of a few people and bought some 700 x 28c Gatorskins for a new build. I inflated them to 110 psi. I installed the front tire onto the bike and notice that the front wheel rubbed on the brake arms ever so slightly. As I hadn't yet installed the STI I think that will be ok, because when I draw the brake arms in toward the rim the arm raises slightly to allow clearance. However, the back is a problem. The tire rubs on the frame!!! Is there such a thing as a frame that will only allow a certain height of tire? I am stumped!!!
    2003 Motobecane Sprintour
    Easton Vista wheels
    Continental Ultra Gatorskins 700 x 28c
    I chose that size because I am 275 lbs and ride on semi rough roads.
    Thanks for any help.
    I run 700x28 Gatorskins (great tires!) on a couple of my bikes and the rear tire on one bike only clears the seatstay bridge by 2 or 3mm. And, that's at 90psi. So, unless you get a road bike that's specifically designed for plenty of clearance, you might have problems. The more all_out_racing a bike is, the more likely. A road bike that's designed for fenders and plenty of clearance - like a Rivendell - is better for tires that are bigger than x25. Any time you know you are going to be running fatter tires or fenders it should be a consideration when spec'ing a new bike. The three places that you would commonly have trouble would be under the seatstay brake bridge, underneath the fork crown, and just behind the BB tube.
    "Work is the curse of the drinking class."
    - Oscar Wilde

  6. #6
    Senior Member boscatman's Avatar
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    Thanks, I think I will trade in these 28c's for some 25c's and see if that does the trick. I am pretty big so I might have a problem going under that.

  7. #7
    Klaatu barada nikto cascade168's Avatar
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    Quote Originally Posted by boscatman
    Thanks, I think I will trade in these 28c's for some 25c's and see if that does the trick. I am pretty big so I might have a problem going under that.
    You might try a different tire. Just like rims, tires have a wide variety of shapes and crosssections. Maybe someone can suggest a tire that is "low height". It's just another of the many things on a bike that are of no importance until they don't fit, or start rubbing. In the words of Rosanne Rosannadanna, "It just goes to show - it's always something".
    "Work is the curse of the drinking class."
    - Oscar Wilde

  8. #8
    Senior Member Ray Dockrey's Avatar
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    I am down to about the same weight you are and I have had no problems with my 700x23's. They came on the bike and I haven't bothered to change them. The road's here aren't the best and I still have no problems. I do run the rear at the tire's recommended max and the front at ten less.

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