Advertise on Bikeforums.net



User Tag List

Results 1 to 18 of 18
  1. #1
    Senior Member
    Join Date
    Jun 2008
    Posts
    65
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Skids with 35c tire?

    I just built up a Jury with 35's. This is my first fg. My foot retention should arrive tomorrow, so I haven't really been trying skids on my flats. I tried a few cock to stem skids today, but it didn't really seem to want to do it. I really had to fight it. Do you think its the tires or just me learning?

  2. #2
    No plan. peabodypride's Avatar
    Join Date
    May 2007
    Location
    PA
    Posts
    2,744
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    both, as I understand the physics you have a larger surface area with 35s touching the ground and therefore more friction to overcome, so you're going to need to work harder (lean more). I'm going to leave my opinion of balls-to-the-stem skids out of here (they're useless, overdone party tricks) but I will say that you're just going to need to learn to unmount the rear more and/or resist moar.

  3. #3
    Senior Member
    Join Date
    Jun 2008
    Posts
    65
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I agree with you on this type of skid. It was just the only way I was able to lock the wheel up without clips.

  4. #4
    Don't Hate. Ride Among Us's Avatar
    Join Date
    May 2008
    Posts
    625
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by c0rpse View Post
    My foot retention should arrive tomorrow... Do you think its the tires or just me learning?
    without foot retention skidding is impossible. skidding requires a combo of pushing and pulling at the same time.

  5. #5
    Senior Member
    Join Date
    Nov 2007
    Posts
    51
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I run 35s for off road mix and yes it's pretty tough to skid but wait to try it in a smaller tire, you will feel like an ox.

  6. #6
    Junior Member
    Join Date
    Feb 2008
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Ride Among Us View Post
    without foot retention skidding is impossible. skidding requires a combo of pushing and pulling at the same time.
    uhhh. no it's not. I know plenty of people that can skid one fitted and not be clipped in. It does require the balls to stem combo, but it's not "impossible".

  7. #7
    Senior Member beeftech's Avatar
    Join Date
    Aug 2008
    Location
    Brooklyn finally.
    My Bikes
    Bianchi San Jose, fixed
    Posts
    832
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm assuming your tires are also of the knobby sort being so wide.
    Before I swapped out the 32c knobby tires on my san jose skidding was pretty hard, and i had to balls to the stem it. So I never really did it.
    With my slicks I can just lift my bum off the seat, and push down on the bars to do it.

  8. #8
    Raving looney
    Join Date
    Jul 2006
    Location
    Toronto, ON, Canada
    My Bikes
    70s Leader Precision w/Shimano 600 (road), IRO Rob Roy (Fixed)
    Posts
    2,486
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Ride Among Us View Post
    without foot retention skidding is impossible. skidding requires a combo of pushing and pulling at the same time.
    LIES!

    I ran platforms on my winter fixie, granted I wouldn't advise riding fixed on platforms, it can be done. Skidding can also be done, but it's a hell of a lot more work than it is with a foot retention system.

    Basically, you *have* to commit to the move, you can't half-ass it, you'll get bucked/thrown - just giv'er with your back leg and push your balls/vag right upto the stem and haul against your bars to get the leverage. My tyre wasn't a 35, mind you (an old tired 28 in fact). I sheered splined cranks on one of my winter bikes because of resisting/skidding - it takes a lot, but it is very much possible.

    I've heard of folks down in the caribbean doing two-footed platform skids, they hook their foot under the lead pedal and push hard on the back leg/pedal, I've never done this personally though.

  9. #9
    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)
    It's your technique that needs to be worked on. I can skid in slippers on 35's so just work at it. Also it's not impossible to be able to skid without being clipped in cuz I can do it (and I don't even like doing tricks). If you hook your foot under the pedal that's all you need

  10. #10
    Senior Member
    Join Date
    Jul 2008
    Location
    ABQ, NM
    My Bikes
    Neuvation F100, Surly Cross Check, Van Dessel Holeshot
    Posts
    1,152
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by peabodypride View Post
    both, as I understand the physics you have a larger surface area with 35s touching the ground and therefore more friction to overcome, so you're going to need to work harder (lean more). I'm going to leave my opinion of balls-to-the-stem skids out of here (they're useless, overdone party tricks) but I will say that you're just going to need to learn to unmount the rear more and/or resist moar.
    At a macroscopic level friction is independent of surface area. Although this sounds counterintuitive, it can be viewed in the following way: if you take some surface area and apply some weight to it then you get a certain pressure. If you take the same material and extend it over a wider area with the same weight then you have lowered the pressure so even though you have more area, which you might equate to more friction, you are simultaneously lowering the pressure so that the effect of larger surface area is cancelled by the lowered pressure.

    What may make a wider tire harder to skid is that it is heavier which will increase the flywheel effect of rear wheel, i.e. increased rotational inertia, and for the same speed you will have to counter a larger rotational inertia which will cause you to have to apply more torque than you normally would. You might quantify this by conserving angular momentum.

  11. #11
    Senior Member iamtim's Avatar
    Join Date
    Sep 2005
    Location
    La Habra, CA.
    Posts
    2,979
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Ride Among Us View Post
    without foot retention skidding is impossible. skidding requires a combo of pushing and pulling at the same time.
    Huh?

  12. #12
    Senior Member
    Join Date
    Jun 2008
    Location
    Stevens Point/Milwaukee, WI
    Posts
    440
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you don't need to put one foot under the other pedal or have foot retention. I skid all the time on the bottom of the pedals.. just lock your left leg, lean your weight over the bars and voilaaaa skidding like its 1999.

  13. #13
    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)
    Quote Originally Posted by matt wisconsin View Post
    you don't need to put one foot under the other pedal or have foot retention. I skid all the time on the bottom of the pedals.. just lock your left leg, lean your weight over the bars and voilaaaa skidding like its 1999.
    i've done it that way too, but find it's the most difficult type to do

  14. #14
    Member
    Join Date
    Jul 2008
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Skidding w/o retention isn't tough at all. Tougher than normal, but skidding isn't really that hard period. If I could learn it in under an hour anyone can.

  15. #15
    oOooo, five bucks ~Stuart~'s Avatar
    Join Date
    Jul 2007
    Location
    Toronto, On
    My Bikes
    Giant OCR touring(06), Norco Storm (05)
    Posts
    846
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i can skid in converse on my ATAC pedals, with one footed. no problem, you just gotta go for it. Mind you i run 23c's, but im just saying its possible to skid one footed just by weighting the front foot.



    and people can do the one leg over the bar skids, last time i checked that was one footed
    How does a Thermos know when to stay warm, and when to stay cold?

    Quote Originally Posted by *WildHare* View Post
    If you can't straddle her proper, she ain't worth mounting :)

  16. #16
    Senior Member
    Join Date
    Jun 2008
    Posts
    65
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No, my tires are not knobbly at all. So I guess its just me committing, either way I get my clips today!

  17. #17
    big ring MIN's Avatar
    Join Date
    Mar 2007
    Location
    philadelphia
    Posts
    5,839
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah I can skid with stillettos on with one foot and no hands. foot retention is for bondage.

  18. #18
    No plan. peabodypride's Avatar
    Join Date
    May 2007
    Location
    PA
    Posts
    2,744
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jonestr View Post
    At a macroscopic level friction is independent of surface area. Although this sounds counterintuitive, it can be viewed in the following way: if you take some surface area and apply some weight to it then you get a certain pressure. If you take the same material and extend it over a wider area with the same weight then you have lowered the pressure so even though you have more area, which you might equate to more friction, you are simultaneously lowering the pressure so that the effect of larger surface area is cancelled by the lowered pressure.

    What may make a wider tire harder to skid is that it is heavier which will increase the flywheel effect of rear wheel, i.e. increased rotational inertia, and for the same speed you will have to counter a larger rotational inertia which will cause you to have to apply more torque than you normally would. You might quantify this by conserving angular momentum.
    physics jedi!

Posting Permissions

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