Advertise on Bikeforums.net



User Tag List

Results 1 to 8 of 8
  1. #1
    Senior Member
    Join Date
    Dec 2008
    Location
    Fullerton
    My Bikes
    KHS 29er SS, Ventana El Toro, Surly CrossCheck, Kona Stinky(retired), Dahon Speed D7,
    Posts
    312
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Widest tires on rim with 15mm inner width?

    Sorry, I know there are various threads on this subject!

    I have a set of Mavic rims with these stats:

    ETRTO size: 622x15C
    Recommended tyre sizes: 19 to 32 mm

    Would anyone feel comfortable going up to 38s? And would they be difficult to mount?

  2. #2
    Godbotherer dwellman's Avatar
    Join Date
    Jan 2011
    Location
    Hermitage, TN
    My Bikes
    1986 Cannondale SR300 (full SRAM Apex) 1996 Cannondale R800 (Full SRAM Rival), 1997 Cannondale R200 (Shimano Tiagra), 2012 Cannondale CAAD 10-5, 1992 Bridgestone RB-1 (SRAM Force)
    Posts
    1,317
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Personally, I wouldn't go past 28, but 32 is pretty much the design limit for a 15mm rim. . I'm not sure there is enough clearance on your average run of the mill crossbike to handle past 35. . . if 38 is a must, then swap those for a 17mm rim. . or at least find a 29er type wheel with a tire similar to what you'd mount to see if it fit-- just to be sure.
    "Do you not know that in a race all the runners run, but only one gets the prize? Run in such a way as to get the prize"
    "So I do not run like someone who doesn't run toward the finish line. I do not fight like a boxer who hits nothing but air."
    "And let us run with endurance the race God has set before us."
    "I have fought the good fight, I have finished the race, I have kept the faith."

  3. #3
    Senior Member
    Join Date
    Nov 2008
    Location
    Bay Area, Calif.
    Posts
    4,816
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by allroy71 View Post
    ETRTO size: 622x15C
    Recommended tyre sizes: 19 to 32 mm

    Would anyone feel comfortable going up to 38s? And would they be difficult to mount?
    That's exactly what I have on the rear wheel of my touring bike at the moment. Works fine, handles well, and no problems mounting or unmounting. Just make sure there's enough clearance in the frame/fork/brakes. 38mm is right at the limit on my bike and it has caliper rim brakes that make it a little hard to get the wheel on or off with these tires fully inflated.

  4. #4
    Senior Member RGNY's Avatar
    Join Date
    Aug 2011
    Location
    Utica,NY,USA
    Posts
    1,526
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    St. Sheldon's graph says 23-32 on 15's.

  5. #5
    Senior Member Yotsko's Avatar
    Join Date
    Aug 2008
    Location
    Eastern NC
    Posts
    425
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I raced on mavic rims with those same dimensions last year and ran 34mm wide tires (Hutch bulldogs). They worked alright. Occasionally after hitting tight corners (in dry conditions) I did find blades of grass between the bead and the rim. I suppose this may be an indication of tire rolling or deformation, but it never became an issue...probably because the bead was super tight on the rim.
    ___________________________
    Do you believe in unlikelyhood!?

  6. #6
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    40,157
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Cross Courses predominantly soft turf and dirt @ what pressure?,
    or this a commuter on street pavement, or?

  7. #7
    Senior Member
    Join Date
    Dec 2008
    Location
    Fullerton
    My Bikes
    KHS 29er SS, Ventana El Toro, Surly CrossCheck, Kona Stinky(retired), Dahon Speed D7,
    Posts
    312
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    @fietsbob This would be for mixed terrain riding, not racing. I had thought about getting 17mm width rims, but I guess I don't want any more parts laying around. I am currently running Speedmax tires that are supposed to be 35mm, but measure 32mm, which agrees with the Sheldon Brown chart. BTW, my rims are Mavic, rear Aksium and front Ksyrium.
    I will likely try some 38mm in the future or try and find 35s that actually measure 35!!

  8. #8
    Senior Member
    Join Date
    Jul 2007
    Posts
    2,000
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by RGNY View Post
    St. Sheldon's graph says 23-32 on 15's.
    The graph is Georg Boeger's and Sheldon himself wrote that many cyclists exceed the recommended widths with no problems.

    Hell, a lot of people used to run Open Pros on their 29er bikes. Not ideal, especially at lowest pressures, but it works fine.

Posting Permissions

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