Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7

Thread: Tire size

  1. #1
    Senior Member
    Join Date
    Dec 2008
    Posts
    146
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Tire size

    I bought a bike used with good 700c-23 tires on it. IN looking over old brochures, the original specs for the bike indicate 700c-28 tires were used. Should I replace them with the "correct" size or not? How does diameter affect ride quality, performance, handling, etc?

    Thanks

  2. #2
    sch
    sch is offline
    Senior Member
    Join Date
    May 2003
    Location
    Birmingham. AL
    Posts
    2,586
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    23mm tire is good for almost any weight of rider but is considered harsh when
    pumped up above about 110#. Larger tires tend to be more absorbing of road
    shock, and can handle clydesdale weights with aplomb. 28 is a comfy ride and
    does nicely at 80-90#. 28mm will fit between most road brakes with a bit of
    a shove. Larger tires need cantis and a cable release to fit or you deflate the
    tire to fit. Rim suitable for 28 can prolly handle a 32, though the frame might
    be a problem if tight, but most frames oemed with 28 have relaxed dimensions.
    You will coast a bit slower and have to put a few more watts into a larger tire
    for the same speed but if the tread is smooth this is a minor consideration.

  3. #3
    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 m750rider View Post
    I bought a bike used with good 700c-23 tires on it. IN looking over old brochures, the original specs for the bike indicate 700c-28 tires were used. Should I replace them with the "correct" size or not? How does diameter affect ride quality, performance, handling, etc?

    Thanks
    What is originally spec'ed on the bike is irrelevant. Your wheels/frame was designed to accept a range of tire sizes. Tyre sizes differ based on the purpose it's used for, total weight and road conditions. Wider tyre at lower pressures will be more comfortable over rougher roads. On glass smooth roads the narrowest tyres pumped up to high pressure will be faster, and also more aerodynamic, and lighter.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Posts
    7,368
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You can run the 23's on the rims you have - as that's how it came from the previous owner. 700 X 28C is a pretty standard size to put on a retail bicycle. Sort of middle-of-the-road width. So they don't scare prospective customers with these "how do you ride on those tiny tires??" So you can keep the 23's - or you can go to 25, to 28, maybe to 32. It's up to you to find what would work best for your terrain and riding-style.

    Happy Tire-Tracks!
    Quote Originally Posted by Cateye View Post
    Only panthers007 is stupid enough to believe that this is a good idea.

  5. #5
    Advisor
    Join Date
    Mar 2008
    Location
    Central New Jersey
    Posts
    544
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are no standard bike tire widths. Tire width should be based upon the type of riding you do and the weight of the rider. A 215 lb rider can't ride the same width tire a 150 lb can ride. Unfortunately most road bikes come with 23 tires assuming everyone weighs the same? The tires you put on should be based upon the type of riding you do, off road, trails, road, how rough are the roads, and your weight.

    Tire manufacturers design their tires for a 15% tire drop. You need to use the tire that will give you a 15% tire drop. Contrary to popular opinion, a high pressure tire is not faster than a "normal" pressure tire. High pressure tires are only faster on tracks.

  6. #6
    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 Lawrence08648 View Post
    A 215 lb rider can't ride the same width tire a 150 lb can ride.
    Wtf. This is complete nonsense. The only thing a 215lb rider will have to do to ride the same tyre is put more air in it to prevent the extra weight from becoming a factor in pinch flats.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  7. #7
    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 Lawrence08648 View Post

    Tire manufacturers design their tires for a 15% tire drop. You need to use the tire that will give you a 15% tire drop. Contrary to popular opinion, a high pressure tire is not faster than a "normal" pressure tire. High pressure tires are only faster on tracks.
    15% tire drop? Wtf does that even mean?

    Assuming riding on glass roads, a higher pressure, narrower tyre will always be faster. There's a point on *real* roads where going to higher pressure/narrower results in being slower but that point is different for everyone. It depends on the road the and combined rider weight & bike.

    I think you're confused.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

Posting Permissions

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