Advertise on Bikeforums.net



User Tag List

Results 1 to 25 of 25
  1. #1
    Senior Member gregstandt's Avatar
    Join Date
    Jun 2008
    Location
    Eastern Washington
    Posts
    167
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    700c on a 27" rim??

    I've been rebuilding an old road bike and wasn't real sure of the rim size. (I got them on a trade with no tires on them). Anyway I bought some 700c tires and mounted them and they went on hard! I mentioned this to a friend and he said they might be 27" rims. Is it possible if you're dumb enough and strong enough to make this mistake?
    The rims are a good quality aluminum and I thought 27'' were the old chrome rims.
    Thanks, Greg
    Relax, it's a bike ride.

  2. #2
    Senior Member demoncyclist's Avatar
    Join Date
    Oct 2002
    Location
    Medway, MA
    My Bikes
    2011 Lynskey Sportive, 1988 Cannondale SM400
    Posts
    2,368
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Highly unlikely that you would get them on if that were the case. Some tire/rim combos are just really snug. They will probably loosen up a little with the miles.
    DEMON

    Satanic Mechanic
    STAR 3 Spinning Instructor

    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

  3. #3
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are 27" AL wheels out there. Still made, easily available as well. And yes it IS possible to fit a 700c tyre onto a 27" rim. Good luck getting it off though. On the upside you won't be fixing any flats out on the road.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 510, Trek 5500, Colnago C-50
    Posts
    8,851
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Michelin Pro Race 700c x 23mm tires fit very tightly on my RR 1.1 rims. I don't believe they would fit on any 27" rims. How tightly tires fit rims varies a lot from brand to brand. I've never seen a 700mm that would fit a 27".

    Al

  5. #5
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Al1943 View Post
    I've never seen a 700mm that would fit a 27".

    Al
    I have.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  6. #6
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,246
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I can't remember, but I think it was either continental or schwalbe made a tire that fit both 622 and 630mm rims...
    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

  7. #7
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by AEO View Post
    I can't remember, but I think it was either continental or schwalbe made a tire that fit both 622 and 630mm rims...
    Rofl.

    Seriously?
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  8. #8
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,246
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    yeah, I wish I could find that post...

    might have been 635 and 630 mixed tire... oh well.
    Last edited by AEO; 06-01-09 at 05:25 PM.
    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

  9. #9
    )) <> (( illwafer's Avatar
    Join Date
    Mar 2008
    Location
    San Diego, CA
    Posts
    2,400
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i bet you could mount a schwalbe 700c on a 27" rim.

  10. #10
    Senior Member AnthonyG's Avatar
    Join Date
    May 2005
    Location
    Queanbeyan, Australia.
    Posts
    3,519
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't believe that you could mount a 700c tire on a 27" rim. 700c has a bead seat diameter of 622mm and 27" has a bead seat diameter of 630mm. Thats an 8mm difference and its simply not going to work. If the difference was under 4mm it might just work but not 8mm.

    Anthony

  11. #11
    Aluminium Crusader :-)
    Join Date
    Apr 2004
    Location
    Melbourne, Australia
    My Bikes
    2007 Cervelo Soloist (alu), Cervelo Carbon Soloist, Cervelo Superprodigy, old CAAD8, Pro-Lite Bella, Ciocc Pryde, Norco Easton Elite, Allegro alu, Paconi 531c, 1988 Raleigh 531c, Centurion Kilo, Bennet Tange 4 hunk of junk
    Posts
    9,822
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ^ I agree: I also would think it's impossible. Even some 700 tyres are almost impossible to fit on 700 rims, so I can't see it happening.

    Anyway, if you want a looser tyre for easier fitting, I've found that some Scwalbe and Maxxis tyres are very loose. In fact, I had a few Maxxis Columbierres which were so loose they blew off my Velocity Deep V.

  12. #12
    Senior Member cyclodan's Avatar
    Join Date
    Feb 2004
    Location
    S.E. Mi.
    Posts
    277
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Al1943 View Post
    I've never seen a 700mm that would fit a 27".
    Al
    operator wrote: "I have"

    Pic's please
    "Spray on Chrome... is this a Ronco product?
    It sounds vaguely similar to spray-on-hair...
    and about as plausible." -akcapbikeforums

  13. #13
    Gear Hub fan
    Join Date
    Nov 2008
    Location
    Reno, NV
    My Bikes
    Civia Hyland Rohloff, Swobo Dixon, Colnago, Univega
    Posts
    2,830
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 531Aussie View Post
    ^ I agree: I also would think it's impossible. Even some 700 tyres are almost impossible to fit on 700 rims, so I can't see it happening.

    Anyway, if you want a looser tyre for easier fitting, I've found that some Scwalbe and Maxxis tyres are very loose. In fact, I had a few Maxxis Columbierres which were so loose they blew off my Velocity Deep V.
    I have an NOS pair of 700c Michelin HiLite Touring tires I just installed and they went on incredibly easy. So far staying on the Velocity Dyad rims but I am keeping my fingers crossed.
    Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro

    Visit and join the Yahoo Geared Hub Bikes group for support and links.
    http://groups.yahoo.com/group/Geared_hub_bikes/

  14. #14
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by cyclodan View Post
    operator wrote: "I have"

    Pic's please
    Don't have pictures.

    This was a flat fix on a customers bike. There's no reason for me to lie. Other experienced mechanics may have seen this before as well.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  15. #15
    Bicycle Repair Man !!! Sixty Fiver's Avatar
    Join Date
    Sep 2007
    Location
    YEG
    My Bikes
    See my sig...
    Posts
    25,149
    Mentioned
    10 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by AEO View Post
    yeah, I wish I could find that post...

    might have been 635 and 630 mixed tire... oh well.
    635 is an English 28 (over sized) and it is conceivable that someone might be able to get a 630 mm (27 inch tyre to fit but you'd probably have to cut the bead to get if off.

    I have never seen 700c tyre mounted to a 27 inch rim.

    Not saying that it can't be done and would bet getting the tyre off and on was as brutal a job as there could be.

  16. #16
    Senior Member
    Join Date
    Jun 2008
    Location
    angus scotland
    My Bikes
    Grifter BSA 20
    Posts
    600
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I used to work at Halfords
    they sell an Apolo CX10 thats a hybrid with 700c rims
    but the stock tyres are such a bad fit I reckon they would fit on 27" rims.
    I should have tried one on my 1978 Dawes Galaxy, when I had it there.
    Ive got a CX10 rear wheel on my Torino. A customer gave it to me as he was getting a new wheel under warranty. Was breaking spokes. I threaded up some spokes and its ok now. It works ok with the 700c tyre Ive got on it.

  17. #17
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by operator View Post
    Don't have pictures.

    This was a flat fix on a customers bike. There's no reason for me to lie. Other experienced mechanics may have seen this before as well.
    Also no pics, but I've seen it as well. Thinking about it, it isn't a new tire by any means but, I'll bet I could get my really old used Vittorias on a 27 inch. They are tight on 700c when they are new, but after several years sitting mounted and aired up, but not being used all that often, they are so loose I have to help them stay lined up on inflation if I replace a flat. Those around 4-8 years ago may remember Vittoria clinchers having the beads "stretch" a bit through use. I remember a couple wheel manufacturers having warnings on their web pages about the use of Vittoria tires.

  18. #18
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Sixty Fiver View Post
    Not saying that it can't be done and would bet getting the tyre off and on was as brutal a job as there could be.
    Didn't bother getting it off. Just cut it off. Shop time was too valuable to have one guy struggle for an hour to get it off.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  19. #19
    Bicycle Repair Man !!! Sixty Fiver's Avatar
    Join Date
    Sep 2007
    Location
    YEG
    My Bikes
    See my sig...
    Posts
    25,149
    Mentioned
    10 Post(s)
    Tagged
    1 Thread(s)
    I had someone mount a 650 B tyre on a 650 A rim once... it had to be cut off.

    There's a 6mm difference in rim sizes there.

  20. #20
    me have long head tube TallRider's Avatar
    Join Date
    Oct 2005
    Location
    Chapel Hill, NC
    Posts
    4,088
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    27" rims made of aluminum aren't uncommon. I have four bikes with 27" aluminum-rimmed wheels, some of which I built up myself, most of which are original.
    But it's true that the 27" standard tended to be used on lower-quality bikes and are thus commonly found with chromed steel rims as well.

  21. #21
    Gear Hub fan
    Join Date
    Nov 2008
    Location
    Reno, NV
    My Bikes
    Civia Hyland Rohloff, Swobo Dixon, Colnago, Univega
    Posts
    2,830
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A friend's 1985 Raleigh Technium 400 has aluminum 27" rims. The bike is totally stock so far as I know.
    Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro

    Visit and join the Yahoo Geared Hub Bikes group for support and links.
    http://groups.yahoo.com/group/Geared_hub_bikes/

  22. #22
    Senior Member
    Join Date
    Mar 2008
    Posts
    433
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Operator's right. I don't have pictures, and no, I can't prove it, but when I was young and silly I wrestled a 700x30 Marathon onto an unlabed, 27" rim. The bead didn't seat (obviously) but it was still mounted on the rim. My boss was able to get it off (it didn't even take that long, just a few minutes of sweating and swearing) and I was given $#!t accordingly.

  23. #23
    Senior Member
    Join Date
    Sep 2008
    Location
    yreka, ca
    My Bikes
    like 15. my favorite a 1951 schwinn spitfire cruiser. also have a 1959 amf roadmaster, 1962 jch deluxe cruiser among others.
    Posts
    542
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    (wow guys) id never seen a 700c tire fit a 27" rim, and even if a few types could, don't mean they should. if your rims are 27's, then find a nice set of 27" tires to install. i know selection isn't the best, but surely you'll be able to find something out there. then either sell, return or trade off the 700c tires. ...or get 700c rims, put the tires on normally (with the expectation you will have no probs getting them back off or back on) and use the 27's as back up.

  24. #24
    Senior Member
    Join Date
    Mar 2008
    Posts
    433
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    OP, if you did manage to mount the wrong size tire, it will be very obvious when you spin the wheel in your hands. The tire will be far from round and will bob all over the place. Hopefully that isn't the case. Good luck!

  25. #25
    Senior Member gregstandt's Avatar
    Join Date
    Jun 2008
    Location
    Eastern Washington
    Posts
    167
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for all your input.

    The tires seem to be seated well and the little ridge above the bead is visible. I think it's just one of those hard tire/rim combos. I'll know more when I get a flat.
    Relax, it's a bike ride.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •