Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11
  1. #1
    Wanderer
    Join Date
    Sep 2008
    Location
    Denver- Wash Park
    My Bikes
    Soma Rush 2010 LTD- 84 Raleigh Marathon- 05 Surly LHT
    Posts
    118
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    27 Inch Rims + Tires + Tubes

    I've got 27 X 1 1/4 set up all around

    My question is can I move to a slightly narrower tire on the same rim, let's say 27 1/8 on the same rim?

    Everything I read on Sheldon Brown looks like it is fairly safe to make that adjustment but I then went looking online for where I normally buy my tires and tubes (http://www.bicycletires.com/) and could find no other "27" tubes than the 27 X 1 1/4. How do I manage my way around the tube situation?

    Thanks in advance!
    Last edited by morry32; 11-17-09 at 03:53 PM.

  2. #2
    biked well well biked's Avatar
    Join Date
    Jul 2005
    Posts
    6,981
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Should be fine with the slightly narrower tires, just be aware that a lot of 27" rims don't have a hooked edge to hold the bead at higher pressures. If this is the case, limit your inflation pressure to 75-80psi maximum even if you're using a tire with a much higher max. inflation rating.

    As for tubes, tubes suitable for a 700 x 32c tire are perfectly fine for 27 x 1 1/4 tires, anything suitable for a 700 x 28c tire will be fine for a 27 x 1 1/8 tires.

  3. #3
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    86 Katakura Silk, 87 Prologue, 87 Cimarron, 14 frame school custom, 73 Paramount
    Posts
    19,983
    Mentioned
    141 Post(s)
    Tagged
    1 Thread(s)
    I mainly work on 27 inch wheels and rarely use 27 inch tubes anymore. I just stock two sizes of 700c tubes.

  4. #4
    Senior Member
    Join Date
    Apr 2009
    Location
    Boulder County, CO
    My Bikes
    '92 22" Cannondale M2000, '92 Cannondale R1000 Tandem, another modern Canndondale tandem, Two Holy Grail '86 Cannondale ST800s 27" (68.5cm) Touring bike w/Superbe Pro components and Phil Wood hubs. A bunch of other 27" ST frames & bikes.
    Posts
    1,376
    Mentioned
    43 Post(s)
    Tagged
    0 Thread(s)
    What determines the width of tire you can run is not the bead seat diameter (630mm on a 27" tire) but the width of the rim. Get a set of vernier calipers and check the inside rim width.

    There are really good 27" rims available in the Velocity Dyad and asymmetric Synergy, and you can get great Continental tires in 27" to boot (UltraGatorskins and touring tires). The Schwalbe Marathon, and Panaracer Pasela (including Tourguard) are also great 27" tires.

    Unless you're racing or training consider going to a wider tire. You'd be amazed how much more comfortable a wider tire (wider than 32mm or 1 1/4") can make a bike, allowing for lower tire pressures. A Rivendell 'set-up' that properly fits (you can actually ride in the drops instead of 99% of the time on the hoods on a too small bike) with wide tires at lower pressures, fenders, etc. should be in every stable. Its amazing how much fun this classic setup can be, plus you can actually take it all in, considering you won't be staring at your front hub the whole time...

  5. #5
    Senior Member
    Join Date
    Mar 2007
    Posts
    3,134
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by wrk101 View Post
    I mainly work on 27 inch wheels and rarely use 27 inch tubes anymore. I just stock two sizes of 700c tubes.
    It's what I do and some major tire sellers recommend. Some even come in 700c Presta OR reg. Schrader valve. As far as size tubes, err to the smaller diameter, tubes are VERY forgiving.

    27" 1 1/8 on 1 1/4 rims.. NO/Prob.

  6. #6
    me have long head tube TallRider's Avatar
    Join Date
    Oct 2005
    Location
    Chapel Hill, NC
    Posts
    4,103
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Good for you for sticking with 27" stuff. There's enough stuff still available out there, and you don't need to worry about re-doing your brakes to make smaller 700c wheels fit.
    I've built a number of wheels with 27" rims (all rear wheels with freehubs) and find that even cheaper single-wall rims (the typical standard in 27") are easy to work with.

  7. #7
    Senior Member
    Join Date
    Jul 2006
    Location
    Middle of the road, NJ
    Posts
    2,421
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by mtnbke View Post
    What determines the width of tire you can run is not the bead seat diameter (630mm on a 27" tire) but the width of the rim. Get a set of vernier calipers and check the inside rim width.

    There are really good 27" rims available in the Velocity Dyad and asymmetric Synergy, and you can get great Continental tires in 27" to boot (UltraGatorskins and touring tires). The Schwalbe Marathon, and Panaracer Pasela (including Tourguard) are also great 27" tires.

    Unless you're racing or training consider going to a wider tire. You'd be amazed how much more comfortable a wider tire (wider than 32mm or 1 1/4") can make a bike, allowing for lower tire pressures. A Rivendell 'set-up' that properly fits (you can actually ride in the drops instead of 99% of the time on the hoods on a too small bike) with wide tires at lower pressures, fenders, etc. should be in every stable. Its amazing how much fun this classic setup can be, plus you can actually take it all in, considering you won't be staring at your front hub the whole time...
    Yes, but:
    a narrower, higher pressure tire will give a more nimble, responsive, ride.

  8. #8
    Junior Member
    Join Date
    Sep 2015
    Location
    Bismarck, North Dakota, USA
    My Bikes
    1980 Raleigh Grand Prix Mixte , 1975ish Ci Itoh Unknown Model Ten Speed, 97 Trek 800 Sport, 72 - 73 Schwinn World Traveler
    Posts
    13
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I just got an old japanese 10 speed cheap and it had the dry rotted gumwall 27 x 1 1/4. I installed two 27 x 1 1/8 with no problem on the steel smooth edge rims at about 75 psi.

  9. #9
    The Left Coast, USA FrenchFit's Avatar
    Join Date
    Feb 2008
    Posts
    2,820
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Great comments here. 700c tubes work just fine. The only issue with 27" tire width I've experienced is an unhooked rim, you are forced to go lower pressure. Since I like narrow tires/high pressure I've replace those rims, but keep the rest of the wheels as is. Easy 1/2 day project, the Sun 27" rims are a great upgrade.

  10. #10
    Dog is my co-pilot 2manybikes's Avatar
    Join Date
    Jun 2003
    My Bikes
    2 many
    Posts
    15,130
    Mentioned
    17 Post(s)
    Tagged
    0 Thread(s)
    The tubes I use on my 27" wheel bikes, have the metric and the inch sizes printed on the box and the tubes too. On my hook bead rim 27" wheel bikes I have gone down to 1" wide tires for a nice little boost in performance.
    [SIGPIC][/SIGPIC]

  11. #11
    Senior Member
    Join Date
    Nov 2009
    Location
    Broad Brook CT
    My Bikes
    1986 bianchi strada, jamis 2002 komodo, 1986 univega aplina uno, miele toscana 300, 1972 puch brigadier, 1992 bianchi advantage
    Posts
    462
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by FrenchFit View Post
    Great comments here. 700c tubes work just fine. The only issue with 27" tire width I've experienced is an unhooked rim, you are forced to go lower pressure. Since I like narrow tires/high pressure I've replace those rims, but keep the rest of the wheels as is. Easy 1/2 day project, the Sun 27" rims are a great upgrade.
    +1 for sun rims. sapim racer double butted spokes and vittoria zafirro tires work well with the sun cr-18 rims.

Posting Permissions

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