Talk:Bicycle tire

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English[edit]

For the day when it becomes an issue, this article was originally written in American English. "Tire" is the correct spelling in this case. -AndrewDressel (talk) 13:46, 12 June 2010 (UTC)

Really?[edit]

How on earth can there be no page for bicycle tires? - 186.105.219.62 17:35, 12 June 2010

Now there is. -AndrewDressel (talk) 13:46, 12 June 2010 (UTC)

To do[edit]

  • Find reference for aerodynamic flaps on tires. Rainer Pivit, as translated by Damon Rinard, says filling the gap helps here. -AndrewDressel (talk) 17:28, 16 June 2010 (UTC)
Done. -AndrewDressel (talk) 13:56, 21 June 2010 (UTC)

Balloon tires[edit]

I have moved the following recent addition here for several reasons:

While makers of bikes with these tires laud their low rolling resistance, they can fail to state that maximum tire pressures are low for big tires. This means balloon tires have large contact patches of rubber meeting the road, contact patches being principal causes of rolling resistance. Manufacturers sometimes mitigate against this with soft rubber compounds, to reduce resistance, but in so doing might decrease resistance to puncturing.[1]
  1. I have not heard of makers of bikes with balloon tires claiming low rolling resistance. Is there an example?
  2. All tires I have seen have their maximum inflation pressure printed right on the side wall. It there an example of one that doesn't?
  3. Is there an example of a manufacturer that reduces rolling resistance of balloon tires with soft rubber compounds?
  4. An anonymous blog is not a reliable source.

Until we can clear up some of these issues, this addition should stay here. -AndrewDressel (talk) 03:13, 21 February 2011 (UTC)

Airless[edit]

Move this here, for if and when anything further develops. -AndrewDressel (talk) 10:44, 30 September 2013 (UTC)

As of 2012, prototypes of airless tires have begun to appear, which use springs, instead of some solid elastic material to provide suspension between the rim and the pavement.[1]

References

  1. ^ Range (3 November 2012). "ERW Airless Bicycle Tires: Never Get A Flat Again". Technabob. Retrieved 2012-11-03. 

Effect of temperature, H2O[edit]

The Effect of temperature segment, just after the part about Nitrogen, misses the point about the effect of moisture (water vapor) in the atmosphere (air); recommend deletion of high-school ideal gas stuff and a better explanation of why N2 gas is used. — Preceding unsigned comment added by 144.183.224.2 (talk) 17:45, 7 April 2015 (UTC)

Calculations must be wrong![edit]

The article states:

Thus, if a tire is inflated to 4 bar (400 kPa; 58 psi) at room temperature, 20 °C (68 °F), the pressure will increase to 4.4 bar (440 kPa; 64 psi) (+6%) at 40 °C (104 °F) and decrease to 3.6 bar (360 kPa; 52 psi) (-13%) at −20 °C (−4 °F).

This is haywire! 20c to 40c is a 6.8% (call it 7%) increase so the pressure change should be from 4.0 bar to 4.28 bar. Similarly the decrease in absolute temperature is 13.6 (call it 14 percent) not 13 and the pressure reduces from 4.0 to 3.44 bar. If no-one challenges this I will revise in a few days. Stub Mandrel (talk) 22:24, 16 August 2016 (UTC)

I would go ahead and fix it now. It's obviously wrong. Kendall-K1 (talk) 22:41, 16 August 2016 (UTC)

Actually it's not so obvious. The pressure inside the tire is really 5 bar, not 4. A 14% reduction brings it down to 4.3 bar, which is 3.3 referenced to atmospheric. Kendall-K1 (talk) 22:29, 5 December 2016 (UTC)

Lead image[edit]

old lead image

Per WP:LEAD, the lead image should be immediately recognizable as a bicycle tire, to "allow readers to quickly assess if they have arrived at the right page." Kendall-K1 (talk) 19:55, 16 February 2016 (UTC)

Do you think that the current image is not recognizable as a bicycle tire? I do find it interesting that we're using a studded ice tire as the lead image, but it's a tire mounted on what's obviously a spoked bicycle wheel, with a reflector and everything. What would make it more obvious? Ivanvector 🍁 (talk) 23:32, 16 August 2016 (UTC)
I already fixed it. Here is the old lead image, which I replaced with the one we have now. Kendall-K1 (talk) 18:59, 18 August 2016 (UTC)
Oh that image. Yeah, that wasn't terribly obvious. Good choice with the new pic. Ivanvector 🍁 (talk) 19:34, 18 August 2016 (UTC)
Thanks! I agonized over the choice far longer than I should have. I wasn't happy with the snow studs, as I wanted as plain and ordinary a tire as possible; also wasn't sure whether to show it mounted on a rim. Ultimately I decided this was the one that the largest number of people would look at and say, "ah yes, that's a bike tire." Kendall-K1 (talk) 23:03, 18 August 2016 (UTC)

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