Advertise on Bikeforums.net



User Tag List

Results 1 to 15 of 15
  1. #1
    Cat 4 J.Lockdown's Avatar
    Join Date
    May 2008
    Location
    Gaithersburg MD
    My Bikes
    Blue RC6AL - Rival Build
    Posts
    570
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Racing on 700 x 20 instead of 700 x 23. Differances?

    So I order 700 x 20's tires instead of the 700 x 23 I currently ride by mistake. What major differences in handling should I expect if there are any (cornering, ect)?

    They will be here tomorrow, and it seems yesterdays indoor training ride did my current ones in (almost no tread left). I have a race tomorrow and am trying to decided if its worth riding the new ones (without doing a couple training rides on them to feel there handeling) or would it be better to just ride the current ones with not a ton of tread left on them?
    Blog:http://e-janis.com
    2009 Blue RC8 -- SRAM Force
    2008 Blue RC6AL-- SRAM Rival

  2. #2
    Edificating dmotoguy's Avatar
    Join Date
    Aug 2005
    Location
    boise idaho
    My Bikes
    2005 Specialized Tarmac Comp, Steyr Clubman, Motobecane Phantom Cross Uno, Cannondale Caad9, IRO bffgss
    Posts
    2,442
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you wont notice a difference.. they'll be fine.
    Ultimate Cat -o- Meter
    X-x0x-x-X - 40%

  3. #3
    nom nom nom Frunkin's Avatar
    Join Date
    Oct 2006
    Location
    Wisconsin
    My Bikes
    Lemond Tete de Course, Slingshot DDX, Fuji Track Pro, Surly Steamroller
    Posts
    2,097
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dmotoguy View Post
    you wont notice a difference.. they'll be fine.
    Except you'll be like twice as fast.

  4. #4
    Edificating dmotoguy's Avatar
    Join Date
    Aug 2005
    Location
    boise idaho
    My Bikes
    2005 Specialized Tarmac Comp, Steyr Clubman, Motobecane Phantom Cross Uno, Cannondale Caad9, IRO bffgss
    Posts
    2,442
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    oh yea, there's that too.
    Ultimate Cat -o- Meter
    X-x0x-x-X - 40%

  5. #5
    Cat 4 J.Lockdown's Avatar
    Join Date
    May 2008
    Location
    Gaithersburg MD
    My Bikes
    Blue RC6AL - Rival Build
    Posts
    570
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No real differences with the cornering then? Whats the real advantage of going with a 20 over a 23 or the other way around then?
    Blog:http://e-janis.com
    2009 Blue RC8 -- SRAM Force
    2008 Blue RC6AL-- SRAM Rival

  6. #6
    Senior Member VA_Esquire's Avatar
    Join Date
    Nov 2008
    Location
    Hampton, VA
    Posts
    2,356
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    about 3mph.
    Cat 6--*----------Cat 5
    Quote Originally Posted by thump55 View Post
    I use the elbow flick to let my wife know it's time for her to make me a samich.

  7. #7
    Cat 4 J.Lockdown's Avatar
    Join Date
    May 2008
    Location
    Gaithersburg MD
    My Bikes
    Blue RC6AL - Rival Build
    Posts
    570
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Im surprised then I have not come across more 20's on bikes in races, or maybe I am just not looking at the tires ha.
    Blog:http://e-janis.com
    2009 Blue RC8 -- SRAM Force
    2008 Blue RC6AL-- SRAM Rival

  8. #8
    Senior Member
    Join Date
    Sep 2008
    Location
    Just this side of insanity.
    My Bikes
    Too many
    Posts
    574
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've been racing all year on 20's. I can't really tell much difference from the 23's other than it takes a whole lot less air to pump them up to 120 psi.

  9. #9
    umd
    umd is offline
    Banned umd's Avatar
    Join Date
    Sep 2005
    Location
    Santa Barbara, CA
    My Bikes
    Specialized Tarmac SL2, Specialized Tarmac SL, Giant TCR Composite, Specialized StumpJumper Expert HT
    Posts
    28,343
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I use 21mm tubulars on my racing wheels and 23mm clinchers on my training wheels. I had a 19 up front for a little while and found it increadilby and uncomfortably twitchy. Probably could have gotten used to it but I replaced it with a 21 when it flatted.

  10. #10
    Cat 4 J.Lockdown's Avatar
    Join Date
    May 2008
    Location
    Gaithersburg MD
    My Bikes
    Blue RC6AL - Rival Build
    Posts
    570
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I guess then I will race the new tires (Continental GP 4000) tomorrow and find out how things go on the warm-up lap.
    Blog:http://e-janis.com
    2009 Blue RC8 -- SRAM Force
    2008 Blue RC6AL-- SRAM Rival

  11. #11
    pan y agua merlinextraligh's Avatar
    Join Date
    Aug 2005
    Location
    Jacksonville
    My Bikes
    Wilier trestina Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecanne Phantom Cross; Cervelo P2
    Posts
    26,711
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Part of this depends on rider size, and tubulars are a bit different than clinchers.

    However, over time a pretty general consensus has developed that 23mm clinchers are better overall for mass start races. (Time trials are another issue because aerodynamics are more important and grip less.)

    Back in the day, the trend was to race on narrower tires, and people rode progessively thinner tires. As people relaized rolling resistence was likely higer, grip lower, and pinch flat risk higher, most people gravitated back to 23 mm.

    Now is the difference between 20mm and 23mm huge? No. Is 23mm probably a better choice for most people? Yes.
    You could fall off a cliff and die.
    You could get lost and die.
    You could hit a tree and die.
    OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.

  12. #12
    Young and unconcerned Treefox's Avatar
    Join Date
    Apr 2006
    Location
    Merry Land
    My Bikes
    Yeah, I got a few.
    Posts
    4,131
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by J.Lockdown View Post
    I guess then I will race the new tires (Continental GP 4000) tomorrow and find out how things go on the warm-up lap.
    Hagerstown?

    Might have wanted to have tried them out in a non-racing context first...
    Die schokoladenseite des radfahrens.

  13. #13
    Super Moderator
    Join Date
    Feb 2007
    Location
    Tariffville, CT
    My Bikes
    Tsunami Bikes
    Posts
    11,785
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    23s are a bit squishier. Because of that they:
    - corner better - don't chatter, absorb undulations better
    - more comfy
    - pinch flat less

    I used to get the narrowest tires possible - did crits on 17mm tubulars. Dumb, dumb, dumb. Chattering in every turn, skipping, sliding, uncomfortable, banging away the whole race, praying I didn't flat. I ride 23s for clinchers, 21-22s for tubulars. With tubulars you can go a bit narrower because A) they stretch more and B) no bead so no pinch flats and more squishy for a given width.

    If you mix tire sizes, put the wider one up front (23 front, 20 rear). You'll maintain a lot of cornering grip. If your rear wheel skips, chatters, or slides a bit, you can recover fine. Forget it if the front one does it. Plus you'll wear out the 20 quickly and have an excuse to put a 23 on.

    I bought a 19mm tubular by accident. I did one race (I only had that tire for my race wheel), took it off, and put it on my track wheel, then hoped I'd be able to race on the track. About 5 years later I finally did.

    cdr

  14. #14
    Senior Member grolby's Avatar
    Join Date
    Jan 2005
    Location
    BOSTON BABY
    Posts
    6,426
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    In my admittedly limited experience, 20's ride pretty badly. It's surprising the difference those 3mm make.

  15. #15
    Cat 4 J.Lockdown's Avatar
    Join Date
    May 2008
    Location
    Gaithersburg MD
    My Bikes
    Blue RC6AL - Rival Build
    Posts
    570
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Treefox View Post
    Hagerstown?

    Might have wanted to have tried them out in a non-racing context first...
    Yep and I wanted to but really had no choice due to the lack of tread on my current ones and the tires taking forever to get.


    In either case it turns out my friend end up getting me the 700 x 23's since the distributor was sold out of the 20's. Along with that road them in the crit race earlier today which turned out being on wet roads and then handled great. I was not really expecting them to handle to much different since they were the 23's and what I was riding before.

    Thanks for the info though.
    Blog:http://e-janis.com
    2009 Blue RC8 -- SRAM Force
    2008 Blue RC6AL-- SRAM Rival

Posting Permissions

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