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Written by shiggy
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Saturday, 11 July 2009 10:20 |
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Rolling resistance is often stated by riders as one of the most important features in choosing a tire. But it should not be the first priority. A common perception is roll resistance in the front is of lower concern, although critical in the rear. There is more to it than that. Sure, I like fast rolling tires, front and rear, but not at the expense of control: tracking, braking and cornering.
The main reason to use the "faster" tire on the rear is you can usually deal with the lesser grip more easily as compared to the front. Drive traction also comes into play but if that is a major concern, rolling resistance is probably not a high priority, either. Bottom line is you need a tire that suits your conditions and riding style AND that you have confidence in. If you do not trust it, you can not get the best from it. |
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Last Updated on Saturday, 11 July 2009 10:48 |
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Written by shiggy
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Friday, 03 July 2009 09:41 |
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Around 2000 I made the first comparisons on the effect of rim width on tire size. The charts below are for two sessions a couple of years apart. The same rims were used for both. The 26mm rim is still used as my "control" rim for measuring all 26" tires for the spec charts. Panaracer Fire Mud Pro 1.8 | Rim width / pressure | Casing Width
mm / in. | Tread Width
mm / in. | Casing
Height
mm | Volume
Index | 22mm rim @ 40 psi (13.3) | 41.2 / 1.62 | 41.9 / 1.65 | 38.7 | 15.9 | 26mm rim @ 40 psi (15) | 42.4 / 1.67 | 42.0 / 1.65 | 38.7 | 16.4 | 32mm rim @ 40 psi (17.1) | 43.9 / 1.73 | 42.1 / 1.66 | 37.3 | 16.4 |
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Last Updated on Friday, 03 July 2009 10:36 |
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Written by shiggy
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Wednesday, 01 July 2009 15:12 |
 Can this tire go both ways? Going to find out! WTB Graffiti UK 26x2.2, ~800g. Designed as a dirt jump/urban tire, I am testing these to see if they will handle, and hold up to, being used on pavement and dirt/trial riding. |
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Last Updated on Wednesday, 01 July 2009 16:17 |
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Written by shiggy
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Wednesday, 01 July 2009 13:24 |
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High Volume vs. Strong Sidewall, which is best for lower psi applications in XC/trail use? In most cases I will go for the lighter, more supple casing. It lets the tire conform to the terrain and work better. Even at lower pressure a stiffer casing can not conform as well.
You basically have to run DH tires at lower pressure to get a similar feel. The specific tire construction, casing size and tread design have to be factored in. |
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Written by shiggy
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Wednesday, 01 July 2009 13:17 |
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One of the reasons I started this site was because of the inconsistencies in mtb tire sizing. I was seeing many people stating “tire X is called a 2.2 but it is really a 1.9″ or “it is a true 2.3″ tire.” Saw different riders calling the same tire “smaller than claimed” and “a real 2.xx.” Very confusing. As far as I am concerned no knobby tire is a “true” anything. You can have wide treads and narrow casings, narrow treads and wide casings or the tread and casing can be the same width. |
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