Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    YOU ARE NOW TUNED IN No_Minkah's Avatar
    Join Date
    Jan 2006
    Location
    The City that Works
    Posts
    1,185
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Do Kevlar-belted tires slow you down?

    I rode Conti Duraskins all winter, and they've held up great. But on a whim I recently picked up some simple rubber tires sans-Kevlar (Kenda Koncepts to be precise) on the cheap, and I feel much faster than I did in the Duraskins. Do kevlar-belted tires really slow a body down, or is this a tire placebo effect? Both tires were 700x23, inflated to max pressure. Hollaback, girls.

  2. #2
    meet the mets chicagoamdream's Avatar
    Join Date
    Jun 2005
    Location
    Bucktown, Chicago
    My Bikes
    Raleigh conversion (hours spent making it look like a Pista); Porter Track, Samson Track, Leto Roadie.
    Posts
    1,554
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by No_Minkah
    Found the Afikomen
    Dope.

    Also, I doubt it. I feel way zippier on Kevlar-belted Michelins than I do on nonbelted Continentals.
    Quote Originally Posted by monkey
    You could be doing blow off a dead hooker with a needle sticking out of your arm and you wouldn't get kicked out of Humboldt.

  3. #3
    Dismount Run Remount etc. 12XU's Avatar
    Join Date
    Apr 2005
    Location
    Some Latitude and Some Longitude
    My Bikes
    A couple customs and some beaters.
    Posts
    2,236
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes and no. I've had mixed results with reinforced tires. For example, the Bontrager Race Lite Hard Case tires (with multiple points of reinforcement, a kevlar belt being one of them) are most certainly not fast tires. On the other hand, Conti GP 4000s are made with Vectran, a material 6 times harder than steel and more effective than kevlar. They are quite nearly the most supple foldable tires out there.

  4. #4
    THIS SPACE FOR RENT
    Join Date
    Jan 2006
    Posts
    2,849
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Totally depends on the tire. Not all kevlar is slow, but the ones that are slow tend to be kev.

    Grab a bag of popcorn, a lawn chair, and a 40, and head over to the commuter forum and you'll hear debates on durability vs. speed/road feel of every tire you can think of.

  5. #5
    Spawn of Satan
    Join Date
    Mar 2003
    Location
    Grand Rapids, Michigan, USA
    Posts
    763
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you have access to a scale, weigh the two tires.

  6. #6
    jack of one or two trades Aeroplane's Avatar
    Join Date
    Jun 2005
    Location
    Suburbia, CT
    My Bikes
    Old-ass gearie hardtail MTB, fix-converted Centurion LeMans commuter, SS hardtail monster MTB
    Posts
    5,635
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by captsven
    If you have access to a scale, weigh the two tires.
    +1, that's what I'm thinking.
    Quote Originally Posted by Dr Irwin Goldstein
    Men should never ride bicycles. Riding should be banned and outlawed. It is
    the most irrational form of exercise I could ever bring to discussion.

  7. #7
    YOU ARE NOW TUNED IN No_Minkah's Avatar
    Join Date
    Jan 2006
    Location
    The City that Works
    Posts
    1,185
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    do you think the weight is the most important factor? I was thinking there might be a difference in the rolling surface area, i.e. kevvies flatten out more on the pavement.

  8. #8
    hateful little monkey jim-bob's Avatar
    Join Date
    May 2003
    Location
    oakland, ca
    Posts
    5,274
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A tire with a kevlar belt rolls faster than a tire with a puncture. That's what I go by.

  9. #9
    YOU ARE NOW TUNED IN No_Minkah's Avatar
    Join Date
    Jan 2006
    Location
    The City that Works
    Posts
    1,185
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rdrr.

  10. #10
    Spawn of Satan
    Join Date
    Mar 2003
    Location
    Grand Rapids, Michigan, USA
    Posts
    763
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are definately more factors too it. Rolling resistance is one. I can also think of tire pressure, tire width and diameter. But, from first glance I would think that a Kevlar belted tire (not beaded) would weigh a bit more than non Kevlar tire. That is why I suggested to weigh the tires.

    I am fortunate. I work in a lab in a food plant. I can accurately weigh anything from a grain of sand to a semi. I weighed my 29er tire yesterday because I am converting to homemade tubeless. The manufactures spec is 570g. My calibrated scale at work says 640g.

    So even if you look up the manufactuers spec, they are only a guidepost.

  11. #11
    Taking "s" outta "Fast" AfterThisNap's Avatar
    Join Date
    Dec 2005
    Location
    Zoo York City
    Posts
    1,989
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    make sure you guys are clearing up the difference between kevlar belts and kevlar beads.

  12. #12
    YOU ARE NOW TUNED IN No_Minkah's Avatar
    Join Date
    Jan 2006
    Location
    The City that Works
    Posts
    1,185
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think I mean Kevlar belts, as are found in my Gatorskins and Duraskins.

Posting Permissions

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