Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  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 02:53 PM.

  2. #2
    biked well well biked's Avatar
    Join Date
    Jul 2005
    Posts
    6,777
    Mentioned
    1 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
    Too many to list, all vintage
    Posts
    19,246
    Mentioned
    47 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
    '89 66cm Cannondale 3.0, '92 22" Cannondale M2000, '92 JxL Cannondale R1000 Tandem, '86 Cannondale ST800 27" (68.5cm) Touring bike w/Superbe Pro components and Phil Wood hubs.
    Posts
    786
    Mentioned
    0 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
    4,089
    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
    2,123
    Mentioned
    0 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.

Posting Permissions

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