Advertise on Bikeforums.net



User Tag List

Results 1 to 22 of 22
  1. #1
    Senior Member
    Join Date
    Feb 2008
    Posts
    88
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    running different sized tires?

    are their any advantages to running fatter tires in the front and skinny in the back, or the other way around?

    I have 700x23s on my bike right now, but I recently got a 700x28.. Was curious if I should put it on now, and which side.

  2. #2
    Utilitarian Boy Gyeswho's Avatar
    Join Date
    Jun 2006
    Location
    Bronx, NY
    My Bikes
    Check the sig to find out
    Posts
    3,235
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    your gear inches will increase slightly with a larger tire on the rear. It'd be useful to put a bigger on the front if your bike has a forward sloping TT (pursuit frame) so you can take a little weight off your hands

  3. #3
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    aside from that, your gear inches will decrease if you put a smaller tire on the rear.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  4. #4
    out of shape
    Join Date
    Dec 2006
    Location
    va
    Posts
    1,456
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i like a 23 on the front and a 25 or 28 on the rear for a little softer ride and more durability.

  5. #5
    Senior Member doomkin's Avatar
    Join Date
    Apr 2007
    Location
    illinois
    My Bikes
    surly steamroller - towniefied.
    Posts
    550
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i've always been told to put a bigger tire up front for better control in wonky weather, but i rode 18's all winter and was mostly fine. i really don't think anything other than spikes would've saved me from a dozen ice-related falls.

    i vaguely remember a bmx guy telling me they run fatter tires up front and smaller tires in back for racing. hell if i know.

  6. #6
    Senior Member
    Join Date
    Feb 2008
    Posts
    88
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    would 28 up front and a 23 on the back be too much of a size difference? Would I run into any problems?
    Im new to this so i don't really know what I'm talking about.. But, wouldn't it seem wierd to run bigger tires up front?

    I'm really hoping for better handling if I ever run into a lightly graveled road or somethmg.. Would the thicker tire up front help? Or should I put it in the back?

    If it helps, I have a fuji track frame.

  7. #7
    70mm4$!n! freeskihp's Avatar
    Join Date
    Aug 2006
    Location
    DC
    My Bikes
    Sworks E5, ritte Bosberg
    Posts
    1,757
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    28 in back for the sweet tarck skidz, 23 in front

  8. #8
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    my boss rides a 69er and says the trails are so smooth they bore him now.

    fyi.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  9. #9
    70mm4$!n! freeskihp's Avatar
    Join Date
    Aug 2006
    Location
    DC
    My Bikes
    Sworks E5, ritte Bosberg
    Posts
    1,757
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what does that have to do with tire size?

  10. #10
    out of shape
    Join Date
    Dec 2006
    Location
    va
    Posts
    1,456
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    some frames won't clear a 28 between the chainstays or under the fork crown, fyi. trek t1 has about 2mm on each side, i had to grind the rear bridge on my track pro, and i've seen several keirin bikes that only fit a 23.

  11. #11
    Senior Member
    Join Date
    Aug 2007
    Location
    USA
    Posts
    502
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sheldon Brown's commentary LINK
    Scroll down to Mixing/Matching Tires.

  12. #12
    Senior Member TimArchy's Avatar
    Join Date
    Jun 2003
    Location
    Atlanta
    My Bikes
    Zeus (Razesa) tarck, Giant TCR road, Eddy Merckx road, Fuji Touring Series IV for everything else
    Posts
    1,155
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Mixing tires is pretty common for off road bikes without suspension. Running a big tire up front gives a little bit more comfort/traction/pinch resistance for bumpy trails. I ran a 2.3" front and 1.8" back for a while.

    On the street, it could help prevent pinch flats from curbs and potholes. But I get most of my pinch flats on the back, so thats where I'd put it.

    I've got the impression that for general riding on the street, using different tire sizes won't really make a noticeable difference, or at least not a noticeable improvement. But experiment away and let us know if you come across anything.
    Quote Originally Posted by Josh Frank
    I will derive power from their cries of despair. My crank a speedy dervish, spinning and spinning through the darkest night that anyone with the audacity to try and suck my wheel will ever see...

  13. #13
    Senior Member MrCjolsen's Avatar
    Join Date
    Nov 2004
    Location
    Davis CA
    My Bikes
    Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
    Posts
    3,954
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I sometimes run a bigger tire in back 60% of my weight is, well, a lot. In order to have the right pressure, I exceed the max psi of most smaller tires.

  14. #14
    Senior Member
    Join Date
    Feb 2007
    Location
    San Francisco
    My Bikes
    Univega Gran Premio, Custom MTB/SS/Commuter, Vintage Miele Fixie under construction
    Posts
    290
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    28c, front and rear.....Im going 32's on my next bike

  15. #15
    Utilitarian Boy Gyeswho's Avatar
    Join Date
    Jun 2006
    Location
    Bronx, NY
    My Bikes
    Check the sig to find out
    Posts
    3,235
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm riding on 35mms right now and it's really lovely. The ride is more comfy, you can ride over rough road a little easier, and you get better tire to road contact in the rain
    Last edited by Gyeswho; 03-21-08 at 12:26 AM.

  16. #16
    live.fast.ride.faster VelocitÓ's Avatar
    Join Date
    Jan 2008
    Location
    Seattle/Bellingham, WA
    Posts
    179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by doomkin View Post
    i vaguely remember a bmx guy telling me they run fatter tires up front and smaller tires in back for racing. hell if i know.
    yeah i run my BMX set up like this for traction. i could see this possibly staying true for a road rig though i havn't actually tried it out.
    [SIGPIC][/SIGPIC]

  17. #17
    Senior Member nathbdp's Avatar
    Join Date
    Nov 2006
    Posts
    624
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i runs 23 in the back and 20 in front i likes it

  18. #18
    live free or die trying humancongereel's Avatar
    Join Date
    Oct 2005
    Location
    where i lay my head is home.
    My Bikes
    bianchi pista workhorse, cannondale r1000, mountain bike fixed conversion
    Posts
    6,999
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i rode 23 front and 28 rear for a long time and the difference between 23/23 is negligible.
    have:ea50 flats, black, light, stiff.
    144 bcd 3/32" 49t sugino track chainring, possibly 75.

    want: risers, light, stiff, 1", black if that can be
    144 bcd 46t or 47t chainring any kind or width

  19. #19
    Senior Member
    Join Date
    Dec 2007
    Posts
    413
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I set my bike up today to do some singlespeed cyclocross, and I used a 38 in the front and a 32 in the back. I think that setup is about as comfortable as a cross bike can be. The traction was impressive with this setup also, but that might just be because the last time I rode off-road was with 23mm tires on my fixed gear with one brake. HARSH.

  20. #20
    Walks with a limp dijos's Avatar
    Join Date
    Nov 2006
    Location
    St Pete
    Posts
    1,341
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by humancongereel View Post
    the difference between 23/23 is negligible.
    how big a difference did you expect? lol!
    I am looking for a 52cm-ish lugged mixte or ladies frame. Pm if you got one.
    Quote Originally Posted by thebristolkid
    Last I checked, most college campuses were firmly attached to solid earth, which, in my experience, is typically adequate for riding a bicycle upon.

  21. #21
    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 TimArchy View Post
    I've got the impression that for general riding on the street, using different tire sizes won't really make a noticeable difference, or at least not a noticeable improvement. But experiment away and let us know if you come across anything.
    +1

    You waste more energy thinking about this problem than just either

    a) doing it
    or
    b) running same size tires
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  22. #22
    liar JACQU3S's Avatar
    Join Date
    Jan 2008
    Location
    MONTREAL
    Posts
    220
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My fork only has clearance for a 20 (or some small 23s) in the front. I usually ride a 23 in the back.

Posting Permissions

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