Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Junior Member
    Join Date
    Aug 2008
    Posts
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    What size tire on my rim?

    OK, here a completely noob question i'm sure, but hey i'm trying.

    My current ride is sporting 700cx40c tires. I ride primarily(99%) on pavement/sidewalk/road. I have become immursed by cycling, riding several times a week, with pedals reaching the 35 mile range in one day. It seems that these tires are ill suited for the biking I want to do, as they are fairly treaded, and seem to produce some resistance (noise etc.) Here is my query.......

    My rims are Weinmann Zac 19's. They read 700C x 28C/38C.................622x 19. I would like to go to a smaller size slick. What size tire will go with this rim? I will be going to the LBS for the work, but would like to sound educated and have ideas prior to going. I have searched the other threads, but cannot put my finger on the info I need. I have read Sheldon Browns info, but others have said his chart is a bit overkill, on the safe side.

    I am looking for a good tire for speed, more of a "road" feel if you will...........

  2. #2
    Senior Member deraltekluge's Avatar
    Join Date
    Sep 2006
    My Bikes
    Kona Cinder Cone, Sun EZ-3 AX
    Posts
    1,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Seems to me that the wheels are telling you that they're for 28mm to 38mm tires. Sheldon's site says your size rims (622 x 19) are for 28mm to 44mm tires. Do you want to go to smaller section tires than 28mm?

  3. #3
    Junior Member
    Join Date
    Aug 2008
    Posts
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I had the idea that Iwanted to go 28mm. But when I saw the rim said 700C x 28c, I figured that meant the rim was 28mm. I suppose my real question is this. Given the information I provided, can I go with a 28mm tire? If not, can I go 32mm?

    The bike came equipped with 40's, the "splay" out a bit, and I feel slow me down considerably for my city riding/commuting.

    Edit:

    Someone confirm if I am a complete idiot, sfter reviewing Sheldon's chart it seems that my rims will support 28-44's. I was looking for 28 on the cart, from the 700C x 28C.

  4. #4
    aka Phil Jungels Wanderer's Avatar
    Join Date
    Apr 2005
    Location
    North Aurora, IL
    My Bikes
    08 Specialized Crosstrail Sport, 05 Sirrus Comp
    Posts
    5,857
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    You already got the correct answer - it will be fine.

  5. #5
    aka Phil Jungels Wanderer's Avatar
    Join Date
    Apr 2005
    Location
    North Aurora, IL
    My Bikes
    08 Specialized Crosstrail Sport, 05 Sirrus Comp
    Posts
    5,857
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Look on Sheldon's chart at 19, the inside measurement of your rim. http://sheldonbrown.com/tire-sizing.html

  6. #6
    Junior Member
    Join Date
    Aug 2008
    Posts
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the replies guys, I feel like an idiot now, but hey, at least I know...........

  7. #7
    aka Phil Jungels Wanderer's Avatar
    Join Date
    Apr 2005
    Location
    North Aurora, IL
    My Bikes
    08 Specialized Crosstrail Sport, 05 Sirrus Comp
    Posts
    5,857
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Happy to be of assistance..... I need help toooooo!

  8. #8
    Senior Member deraltekluge's Avatar
    Join Date
    Sep 2006
    My Bikes
    Kona Cinder Cone, Sun EZ-3 AX
    Posts
    1,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Fuzzifus View Post
    I had the idea that I wanted to go 28mm. But when I saw the rim said 700C x 28c, I figured that meant the rim was 28mm. I suppose my real question is this. Given the information I provided, can I go with a 28mm tire? If not, can I go 32mm?
    According to the information in your post, the rim size is 622mm x 19mm, and they're intended for 700 x 28 through 700 x 38 tires.

    My understanding is that the non-aerodynamic portion of the tires' drag is not really a function of tire width, though...that it's more dependent on pressure and tread design and tire material and construction than on width.

  9. #9
    CAT4 joe_5700's Avatar
    Join Date
    Jun 2007
    Location
    Omaha, Nebraska
    My Bikes
    2009 Cervélo S1, 2009 Felt F75, 2010 Cannondale Synapse Carbon 5, 2011 Cannondale CAADx, 2011 Specialized Transition Elite
    Posts
    1,672
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I swapped out 700X35's with some cheap 700X28 Michelin Dynamics. It makes a heck of a difference. You will be doing 50 mile rides on those in no time. You will probably have to swap out your tubes and get some 700X28/32's.

    http://www.nashbar.com/profile.cfm?sku=8756

  10. #10
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    7,364
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Sheldon said his chart was conservative, so you could probably go to 25's if desired.
    Whatever you pick, you should notice an immediate improvement in acceleration and rolling resistance. Keep them pumped to the max. Expect to have to top off the air pressure more frequently too.

  11. #11
    rebmeM roineS JanMM's Avatar
    Join Date
    Jan 2006
    Location
    Indiana
    My Bikes
    RANS V3, RANS V-Rex, RANS Screamer
    Posts
    11,828
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Even if you went to some fairly light 32's you would see a significant improvement.

  12. #12
    Junior Member
    Join Date
    Aug 2008
    Posts
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for all the replies, this has been a ton of help........

    I have narrowed it down to two choices, anything else relevant feel free to add.......

    Kenda Kick Roller Sport 700 x 28C


    Continental Sport Contact 700 x 28C

    Any opinions, I have read good reports of both tires...........

  13. #13
    Senior Member
    Join Date
    Jun 2004
    Location
    Northern Nevada
    Posts
    3,749
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    In my experience, Sheldon's chart (and the rim makers' recommendations) are VERY conservative. I've run tires from 23mm to 41mm on both my road bikes (Atlantis and Rambouillet) with no trouble at all. I'm sure you'll be fine with 28s or even 25s.
    As for tubes, I've bought only two sizes for at least 10 years: 700x25 for all the family's road bikes and 26x1.5 for all the mountain bikes, using tires from 2.3 inch knobbies down to 1.4 slicks. Everything fits, everything works, no problems.

  14. #14
    Senior Member late's Avatar
    Join Date
    Oct 2002
    Location
    Southern Maine
    Posts
    8,290
    Mentioned
    54 Post(s)
    Tagged
    0 Thread(s)
    Basically, there are small, medium, and large tires. Small tires run around a couple hundred grams. Medium tires are 300 and up.. Large tires 400 gr and up.

    Yes, you can use a medium tire. 32c is a great compromise between this and that.
    I am using Panaracer Pasela TG folding tires. They may weigh half what your current tires weigh. They are quite lively for their size.

    Btw, I was using 28c Marathon Racers last year and decided to jump up to 32c for the better ride quality.
    Your friendly, local, minor god of information.

Posting Permissions

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