Advertise on Bikeforums.net



User Tag List

Results 1 to 15 of 15
  1. #1
    Senior Member trickdog's Avatar
    Join Date
    Sep 2004
    Location
    Somehere West of The Rockies
    My Bikes
    2005 MTB
    Posts
    134
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    1.5 inch tire on a 1.75 inch rim?

    Looking to get back into full time commuting once the Orthopedic Surgeon finds out what is wrong with my knees. In the meantime and now that our local wet rainy winter is on the way, I have purchased a bike trainer to do some light indoor exercise.

    My commuter is a MTB with a 26 x 1.75 inch rim on the back with a 1.95 inch slick tire. For riding my bike on the trainer, can I mount a 1.5 inch tire on that 1.75 inch rim? I asked at the local bike shop and was told no and that could only use a 1.75 or 1.95 tire on the rim.

    Thanks in advance.

  2. #2
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    40,093
    Mentioned
    27 Post(s)
    Tagged
    0 Thread(s)
    You measuring the rims themselves? or just the tire?

    what rims are you talking about specifically?

    what tool are you using to measure this?

  3. #3
    Super Moderator no1mad's Avatar
    Join Date
    Apr 2008
    Location
    NE OK
    My Bikes
    '06 Kona Smoke
    Posts
    7,772
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Cyril View Post
    Ride what and in what manner pleases you. Those that mind don't matter, and those that matter don't mind. srsly.
    Community guidelines

  4. #4
    PatronSaintOfDiscBrakes dynaryder's Avatar
    Join Date
    Apr 2005
    Location
    dropped and lost in Washington DC
    Posts
    5,832
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    You should have a sticker somewhere on your rim that says something like "559xNN",with NN the rim's width. Compare that to this chart to see what will fit:
    http://www.schwalbetires.com/tech_in...dimensions#rim

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Brompton S6L,Dahon Speed Pro TT

  5. #5
    tougher than a boiled owl droy45's Avatar
    Join Date
    Oct 2008
    Location
    Rocky Coast of Maine
    My Bikes
    Fetish Cycles Fixation / Fuji S12S / Gary Fisher MTB / Raleigh Grand Prix / Ross Professional / Kent comfort cruiser
    Posts
    1,126
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I use 1.5 in slicks on MTB wheels made for any knobby tire. It works just fine. I don't see any reason why that wouldn't work for you too. Not sure what your bike shop is thinking.
    For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. John 3:16

  6. #6
    It's MY mountain DiabloScott's Avatar
    Join Date
    Sep 2006
    Location
    Mt.Diablo
    Posts
    5,438
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by trickdog View Post
    Looking to get back into full time commuting once the Orthopedic Surgeon finds out what is wrong with my knees. In the meantime and now that our local wet rainy winter is on the way, I have purchased a bike trainer to do some light indoor exercise.

    My commuter is a MTB with a 26 x 1.75 inch rim on the back with a 1.95 inch slick tire. For riding my bike on the trainer, can I mount a 1.5 inch tire on that 1.75 inch rim? I asked at the local bike shop and was told no and that could only use a 1.75 or 1.95 tire on the rim.

    Thanks in advance.
    1.75" rim width is something you'd see on a really fat beach cruiser or a snow bike - not your standard MTB.
    http://diabloscott.blogspot.com/

  7. #7
    Senior Member
    Join Date
    Mar 2011
    Posts
    314
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DiabloScott View Post
    1.75" rim width is something you'd see on a really fat beach cruiser or a snow bike - not your standard MTB.
    That depends on the bike, many older mountain bikes came with 26x1.75" rims. I have an old Ross that has them. I wouldn't put a 1.5 inch tire on them and there is really no need or advantage.

  8. #8
    Senior Member trickdog's Avatar
    Join Date
    Sep 2004
    Location
    Somehere West of The Rockies
    My Bikes
    2005 MTB
    Posts
    134
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks everyone. The rim is a MTB rim as I purchased it some years ago for this same bike. I tried the 1.5" tire on the rim last night then tested on the bike trainer and had no problems after an hour and a bit of riding on the trainer. I will see how it goes over the next few days and can always switch back to the 1.95" tire if need be.

  9. #9
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    40,093
    Mentioned
    27 Post(s)
    Tagged
    0 Thread(s)
    I doubted you had such a wide rim , were just calling the tire the rim.
    seems confirmed .

    That depends on the bike, many older mountain bikes came with 26x1.75" rims. I have an old Ross that has them.
    Ross is just the brand they didn't make the rims , so still nobody measures anything.

    I run 1.9" tires on my Snow Cat rims , they really are wide .. 45mm . or 1.5"

    the tire takes on a straight sidewall D, shape. rather than a usual more round section.

    Its running Studded tires, now..
    Last edited by fietsbob; 10-09-13 at 08:59 AM.

  10. #10
    Senior Member
    Join Date
    Mar 2011
    Posts
    314
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by fietsbob View Post
    I doubted you had such a wide rim , were just calling the tire the rim.
    seems confirmed .



    Ross is just the brand they didn't make the rims , so still nobody measures anything.

    I run 1.9" tires on my Snow Cat rims , they really are wide .. 45mm . or 1.5"

    the tire takes on a straight sidewall D, shape. rather than a usual more round section.

    Its running Studded tires, now..
    I fully understand that Ross didn't make the rims, they are Araya rims and are clearly stamped, 26x1.75, and are in fact 1.75.

  11. #11
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    40,093
    Mentioned
    27 Post(s)
    Tagged
    0 Thread(s)
    that outside width of the rim? thats 48mm .. I dont remember them being that wide.
    and I'm that old.

  12. #12
    It's MY mountain DiabloScott's Avatar
    Join Date
    Sep 2006
    Location
    Mt.Diablo
    Posts
    5,438
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by phughes View Post
    they are Araya rims and are clearly stamped, 26x1.75, and are in fact 1.75.
    Those boogers are wiiiiiiiiide. I wouldn't feel comfortable with 1.5" tires in there... but what's the worst that can happen on a trainer? Maybe scare your dog when it blows out.

    http://diabloscott.blogspot.com/

  13. #13
    Senior Member
    Join Date
    Mar 2011
    Posts
    314
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DiabloScott View Post
    Those boogers are wiiiiiiiiide. I wouldn't feel comfortable with 1.5" tires in there... but what's the worst that can happen on a trainer? Maybe scare your dog when it blows out.
    That is my point, if it is truly a 1.75 inch rim, I would never put a 1.5 inch tire on it.

  14. #14
    It's MY mountain DiabloScott's Avatar
    Join Date
    Sep 2006
    Location
    Mt.Diablo
    Posts
    5,438
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by phughes View Post
    That is my point, if it is truly a 1.75 inch rim, I would never put a 1.5 inch tire on it.
    Sorry, I got you confused with the OP. We agree.
    http://diabloscott.blogspot.com/

  15. #15
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
    Location
    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
    Posts
    8,105
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Chances are good that the 1.75" rims are only 25mm across on the inside, so a 1.5" tire would be fine by the ETRTO guidelines. I wouldn't go any narrower, though.

    http://www.araya-kk.co.jp/rim/archive/1985/07-08.htm
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

Posting Permissions

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