Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 26
  1. #1
    Humvee of bikes =Worksman Nightshade's Avatar
    Join Date
    May 2004
    Posts
    5,280
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Why do bike tires suck?

    "Through years of bicycle riding, Iíve never been able to pinpoint the exact reason why bicycle tires suck so badly. One fills a car tire with air maybe once or twice a year (really just checking the overall pressure), but a bike tire, it seems, has to be topped off over and over. Why are bike tires so lousy at their intended job of holding air under pressure?"


    http://grist.org/living/ask-umbra-wh...-tires-suck-2/
    My preferred bicycle brand is.......WORKSMAN CYCLES
    I dislike clipless pedals on any city bike since I feel they are unsafe.

    Originally Posted by krazygluon
    Steel: nearly a thousand years of metallurgical development
    Aluminum: barely a hundred, which one would you rather have under your butt at 30mph?

  2. #2
    Senior Member Nermal's Avatar
    Join Date
    Jan 2006
    Location
    Farmington, NM
    My Bikes
    Giant Cypress SX
    Posts
    1,871
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Remember when your car had inner tubes? Remember the old red rubber inner tubes that made such great sling shots, and such lousy inner tubes?
    Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.

  3. #3
    Senior Member
    Join Date
    Jun 2004
    Location
    Northern Nevada
    Posts
    3,748
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Several reasons. A few that come to mind:
    You inflate car tires to 30-35 psi, bike tires to maybe 75-100. The air tries harder to get out.
    The volume of bike tires is much smaller, so a loss of air that would be imperceptible in a car is easily noticed in a bike.
    The rubber in a bike tire and tube is a fraction of the thickness of that in a car. The air has an easier path to escape.
    And you should be checking your car tire pressure at least once a month, not once a year. I used to work for a car magazine, and for a story one time we went out to our parking lot and checked 100 tires at random. Seventy of them were underinflated.

  4. #4
    Senior Member
    Join Date
    Dec 2006
    Location
    Bucks County, PA
    Posts
    400
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think the response in the link glossed over the answer. I think the problem is that bike inner tubes are made from a material that is gas permeable while car tires are made from a material that is not. Why bike inner tubes are not or can not be made of a better material I don't know.

    An example is latex versus Mylar party balloons. The latex balloons deflate in days while the Mylar balloons will stay inflated for years. The latex material passes gas. (Yes, I said pass gas.)
    Last edited by JPMacG; 09-03-12 at 04:31 PM.

  5. #5
    Senior Member DieselDan's Avatar
    Join Date
    Mar 2003
    Location
    Beaufort, South Carolina, USA and surrounding islands.
    My Bikes
    Cannondale R500, Motobecane Messenger
    Posts
    8,522
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    When you take your car in for routine service, the shop usually will check tire pressure and top off.

    Bike tires don't hold air at all, but the tube that does. You can't compare the two as the demands on a car tire are 1000x more then a bike.
    Last edited by CbadRider; 09-04-12 at 01:31 PM. Reason: Removed rude remark
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  6. #6
    Senior Member rdtompki's Avatar
    Join Date
    Nov 2008
    Location
    Hollister, CA
    My Bikes
    Volagi, daVinci Joint Venture
    Posts
    3,934
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I thought the OP's thread would be about tire wear, flats, cost, etc. The last thing I worry about with bike tires is having to inflate them every time I ride - takes 30 seconds max.

    One of my manure carts has foam-filled tires - never have to inflate, no flats, hard as a rock.
    Rick T
    --------
    Volagi - Triple"ized" and Tubeless
    daVinci Joint Venture

  7. #7
    Senior Member Flying Merkel's Avatar
    Join Date
    Mar 2008
    Location
    Costa Mesa CA
    Posts
    2,539
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Velo Dog View Post
    Several reasons. A few that come to mind:
    You inflate car tires to 30-35 psi, bike tires to maybe 75-100. The air tries harder to get out.
    The volume of bike tires is much smaller, so a loss of air that would be imperceptible in a car is easily noticed in a bike.
    The rubber in a bike tire and tube is a fraction of the thickness of that in a car. The air has an easier path to escape.
    And you should be checking your car tire pressure at least once a month, not once a year. I used to work for a car magazine, and for a story one time we went out to our parking lot and checked 100 tires at random. Seventy of them were underinflated.
    Much truth. Buy a good floor pump with a gauge and use it at least once a week.
    Pronounced "Murkle"

  8. #8
    Nobody Special Rekless1's Avatar
    Join Date
    Aug 2012
    Posts
    105
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Well first of all I check my car tires WAY more than 1 or twice a year. They drop pressure not unlike a bike tire, only they are at a much lower pressure and dramtically greater volume.

    So....

    I can't answer the question as posed.

  9. #9
    Thread Killer
    Join Date
    Aug 2008
    Location
    Ann Arbor, MI
    Posts
    3,829
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DieselDan View Post

    Troll.
    Dude, the OP rides trikes (and not the recumbent type), and feels it necessary to declare, in every single post, how he thinks clipless pedals and aluminum bikes are unsafe. I'm pretty certain he believes the craziness he types, and is not trolling.
    Chaad--'95 DeKerf Team SL, '02 Lemond Buenos Aires, '05 Novara Buzz, '73 Schwinn Collegiate, '06 Mountain Cycle Rumble, '09 Dahon Mariner D7, '12 Mercier Nano, '12 Breezer Venturi

  10. #10
    Starting over CraigB's Avatar
    Join Date
    Jun 2005
    Location
    Indianapolis
    My Bikes
    1990 Trek 1500; 2006 Gary Fisher Marlin; 2011 Cannondale Synapse Alloy 105; 2012 Catrike Trail
    Posts
    4,081
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by chaadster View Post
    I'm pretty certain he believes the craziness he types, and is not trolling.
    Has anybody else bothered to check the link he provided? His question is lifted directly from it; it's not his own. He either 1) just saw something of interest someplace else and is repeating it here because he thinks we'd also find it interesting and might want to participate in a conversation about the topic in general, or 2) trolling.
    Craig in Indy

  11. #11
    Senior Member
    Join Date
    Aug 2008
    Location
    Irving, TX
    My Bikes
    Schwinn Paramount
    Posts
    353
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Now that I have a car that has built-in tire pressure monitors I find that I have to top off the pressure a lot more often than I used to have to. But now I have my own compressor so it is no big deal.

  12. #12
    Senior Member
    Join Date
    Sep 2007
    Posts
    8,526
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Dumb post.

    A single car wheel (with the tire) weighs 20-30 pounds. (And the pressure is 30 PSI rather than 60-120.)

  13. #13
    Senior Member
    Join Date
    Jun 2004
    Location
    Northern Nevada
    Posts
    3,748
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JPMacG View Post
    ?.. bike inner tubes are made from a material that is gas permeable while car tires are made from a material that is not.. latex balloons deflate in days while the Mylar balloons will stay inflated for years
    Not entirely true. Car tires will lose two or three pounds a month, which is why you should check them regularly and why so many people are running around on underinflated tires. And Mylar balloons hold air better than rubber (or whatever they use these days), but certainly not for years. I got a bunch of them in the hospital last year, and by the time I got out 10 days later, they'd deflated and were hovering about knee high.

  14. #14
    Senior Member
    Join Date
    Apr 2011
    Posts
    1,120
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by njkayaker View Post
    Dumb post.

    A single car wheel (with the tire) weighs 20-30 pounds. (And the pressure is 30 PSI rather than 60-120.)
    A single car tire, 15-17 inch, is typically 20-30 pounds. There is a much greater variance in wheel weights due to different manufacturing techniques like stamped steel, or forged vs cast aluminum alloy. At 17" wheel can be anywhere from 15 to 30 pounds depending on design an manufacturing method.

  15. #15
    Senior Member
    Join Date
    Apr 2011
    Posts
    1,120
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Velo Dog View Post
    Not entirely true. Car tires will lose two or three pounds a month, which is why you should check them regularly and why so many people are running around on underinflated tires. And Mylar balloons hold air better than rubber (or whatever they use these days), but certainly not for years. I got a bunch of them in the hospital last year, and by the time I got out 10 days later, they'd deflated and were hovering about knee high.
    I check my car tires every month or two, and I have not seen them lose anywhere close to 2 or 3 PSI per month. My car has had 36 PSI for the last 6 months. Steel wheels w/ hub caps and Yokohama tires (installed in mid-2009) if it means anything.

  16. #16
    Dog is my co-pilot 2manybikes's Avatar
    Join Date
    Jun 2003
    My Bikes
    2 many
    Posts
    13,745
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Bike tires don't suck.
    [SIGPIC][/SIGPIC]

  17. #17
    Senior Member GrandaddyBiker's Avatar
    Join Date
    May 2012
    Location
    South Carolina
    Posts
    251
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Nightshade View Post
    "Through years of bicycle riding, I’ve never been able to pinpoint the exact reason why bicycle tires suck so badly. One fills a car tire with air maybe once or twice a year (really just checking the overall pressure), but a bike tire, it seems, has to be topped off over and over. Why are bike tires so lousy at their intended job of holding air under pressure?"


    http://grist.org/living/ask-umbra-wh...-tires-suck-2/
    Ok, I am going to try to break it to you as gently as I can. The reason you are having so much trouble with you tires is that the gods don’t like you. When you are asleep at night they send someone to let a little air out of your bike tires each night.

    The rest of us loose air pressure in our bikes more than in our cars because the tubes in our bikes are thin and it is easier for the air to go through thin tubes than thick tubeless tires on our cars. However, in your case it’s the gods, they just don’t like you.
    When I ride my destination is the ride itself. So I always get to where I am going.

  18. #18
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    942
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    when the pressure inside the tube is = to the atmosphere , pressure loss stops.

  19. #19
    Pedaled too far. Artkansas's Avatar
    Join Date
    Oct 2005
    Location
    La Petite Roche
    Posts
    12,251
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    It's just your bicycle's way of getting a little attention from you after giving you such great service. Your chain you can neglect and it will keep working, sort of. You never notice a spoke until it snaps. Your bike frame may go completely neglected for years at a time. But your bike tubes want to get their kink on and quietly whisper for a little blow every once in a while.
    "He who serves all, best serves himself" Jack London

    Quote Originally Posted by Bjforrestal View Post
    I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

  20. #20
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
    Location
    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
    Posts
    8,368
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    If bike tires were constructed like car tires, they'd be thick and heavy -- no one would want to ride them.

    And anyone thinking Nightshade is having tire problems needs to have their reading comprehension checked.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  21. #21
    Senior Member GrandaddyBiker's Avatar
    Join Date
    May 2012
    Location
    South Carolina
    Posts
    251
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ThermionicScott View Post
    If bike tires were constructed like car tires, they'd be thick and heavy -- no one would want to ride them.

    And anyone thinking Nightshade is having tire problems needs to have their reading comprehension checked.
    I just read his link and you are right, he is not asking a question, he is just posting someone else’s question that he already has the answer to. Why would someone do that?
    When I ride my destination is the ride itself. So I always get to where I am going.

  22. #22
    Senior Member redcon1's Avatar
    Join Date
    Aug 2008
    Location
    South Central PA
    My Bikes
    Gary Fisher Big Sur, Santa Cruz Blur, Raleigh Competition, Focus Arriba, Focus Izalco Ergoride
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by GrandaddyBiker View Post
    I just read his link and you are right, he is not asking a question, he is just posting someone else’s question that he already has the answer to. Why would someone do that?
    I guess for the same reason as going on an endless rant about how clipless pedals are unsafe.

  23. #23
    Starting over CraigB's Avatar
    Join Date
    Jun 2005
    Location
    Indianapolis
    My Bikes
    1990 Trek 1500; 2006 Gary Fisher Marlin; 2011 Cannondale Synapse Alloy 105; 2012 Catrike Trail
    Posts
    4,081
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ThermionicScott View Post
    And anyone thinking Nightshade is having tire problems needs to have their reading comprehension checked.
    My point back in post #10.
    Craig in Indy

  24. #24
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
    Location
    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
    Posts
    8,368
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Yep, it's his wont.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  25. #25
    Senior Member devianb's Avatar
    Join Date
    Dec 2007
    Location
    Central Illinois
    My Bikes
    2008 Dawes Haymaker 20XX Leader LD515
    Posts
    565
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just curious, do the tubeless setups loose much air compared to inner tubes?

Page 1 of 2 12 LastLast

Posting Permissions

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