Urban Velo

PumpTire: Self Inflating Bicycle Tire

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12 Comments

  1. scottAugust 23, 2011 at 7:56 pm

    This seems pretty awesome, but brings up a few concerns:

    1. When raising the pressure over a mile, you are pretty susceptible to pinch flats at such a low start pressure.

    2. Does the pressure hold when the bike stops or is parked over night? Do you have to start at such a low pressure for every ride?

    3. How quickly is the inflation mechanism going to wear down and become unusable? Will it wear down quicker than a normal tire?

    4. Is there a way raise the pressure to something closer to 120?

  2. T.S.August 24, 2011 at 1:47 am

    at 700×28 i dont know why you’d want to go up to 120psi….unless you weigh a ton or something….

    this looks like the tube is integrated into the tire, like a tubular clincher tire, like this: http://www.tufonorthamerica.com/tiretypes.php, which would mostly eliminate pinch flats, but would making patching a puncture difficult…

    how is the durability of that exposed pump mechanism and handling characteristics with that bead running down the center of the tread…

    will the “ampule” be destroyed by a single small puncture? especially if near the valve? my tires get all kinds of embbeded shards of small glass and road debris that dont make it to the tube but cut up the tread surface. (I ride armadillos or gatorskins)

    Cool idea. I would never buy it though… nor do i think anyone who actually cares what their tire pressure is would…pumping a tire is pretty damn easy…

  3. loganAugust 24, 2011 at 10:19 am

    I could see this being useful for rental fleets or city-wide yellowbike programs, but only if the inflation tube isn’t the first thing that wears out on the tire. That looks to be a deal breaker.

    Right now the thinnest part of the tire is in the primary wear area. Bad design. And those pressure release valves have to unbalance the wheel. Not an issue on a cruiser, but anything called “high performance” needs to be balanced for high speed/down hill riding.

  4. SvenAugust 24, 2011 at 1:58 pm

    Not to mention riding and cornering with that raised center ridge would probably feel pretty squirrelly

  5. PumpTire- a self inflating bicycle tire | Bicycle DesignAugust 25, 2011 at 4:15 pm

    [...] has been getting quite a bit of attention in the last couple days. Cyclelicious, Bike Hugger, UrbanVelo, Bike Rumor, and Bike Radar are just a few of the bike sites where you can read more about the [...]

  6. PumpTire- a self inflating bicycle tire – BaikBike.com – Malaysia's No.1 Online Cycling MagazineAugust 26, 2011 at 1:23 am

    [...] has been getting quite a bit of attention in the last couple days. Cyclelicious, Bike Hugger, UrbanVelo, Bike Rumor, and Bike Radar are just a few of the bike sites where you can read more about the [...]

  7. Magic: The Self-Inflating Bike Tire | Dinosaur Tires & WheelsAugust 26, 2011 at 8:40 am

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  8. Magic: The Self-Inflating Bike Tire | Science & TechnologyAugust 26, 2011 at 9:13 am

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  9. Magic: The Self-Inflating Bike Tire - IProNewsAugust 26, 2011 at 10:12 am

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  10. Magic: The Self-Inflating Bike Tire | t3knoDorKsAugust 26, 2011 at 3:57 pm

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  11. Magic: The Self-Inflating Bike Tire | 127.0.0.1August 27, 2011 at 5:50 am

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  12. Magic: The Self-Inflating Bike Tire | Gadget Lab | WiredMarch 5, 2014 at 11:47 pm

    [...] PumpTire: Self Inflating Bicycle Tire [Kickstarter via Urban Velo] [...]

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