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It's as simple as that.
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Ratboy how do you work out the number of skid patches as im planning to have a 54 19 or 20?
If you express the ratio of teeth on your chainring and cog as a fraction and then cancel down, then the numerator gives you the number of skid patches, as this is the number of positions the back wheel can be in while you've got the pedals locked. For example;
16/48 = 1/3 so there is one patch
17/48 doesn't cancel down so there are 1719/54 doesn't cancel down so there are 19
20/54 = 10/27 which gives you 10 -
willski [quote]Ratboy how do you work out the number of skid patches as im planning to have a 54 19 or 20?
If you express the ratio of teeth on your chainring and cog as a fraction and then cancel down, then the numerator gives you the number of skid patches, as this is the number of positions the back wheel can be in while you've got the pedals locked. For example;
16/48 = 1/3 so there is one patch
17/48 doesn't cancel down so there are 1719/54 doesn't cancel down so there are 19
20/54 = 10/27 which gives you 10[/quote] ok thanks for that info -
Do you really think you'll turn your tyre round every few days though? I know that its something that would really annoy me if I had to do it. Thats what I like about my track bike is that I only need to blowup the tyres and change them every few months other than that almost nothing.
Something that I think you should learn to do if your riding brakeless is skid either feet forwards, this multiplies your skid points by 2 if you use them both. It can also reduce your braking distance
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daccordi Do you really think you'll turn your tyre round every few days though?
Yes - if you want it to last longer.
No - if you would rather buy new tyres than rotate your rear wheel.
It's choice.
daccordi Something that I think you should learn to do if your riding brakeless is skid either feet forwards, this multiplies your skid points by 2 if you use them both
This is not always true.
For example with a 48t chaining - changing which foot is forward in the skid will not multiply your skid patches. (except for 48x16 which changes 1 patch to 2)
Check it out:
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Ratboy how do you work out the number of skid patches as im planning to have a 54 19 or 20?
Use this:
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tynan [quote]Mr Bungle I changed my keks a few weeks ago - ta for askin.
If you turn them inside out - they will last for twice as long between washes.[/quote]
don't vittoria do reversible tyres?!http://www.ribblecycles.co.uk/details.asp?Cat=&D=&GenCode=VITTTYRF0150&Section=
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That's stupid.
*Bicycle tires for on-road use have no need of any sort of tread features; in fact, the best road tires are perfectly smooth, with no tread at all!
Unfortunately, most people assume that a smooth tire will be slippery, so this type of tire is difficult to sell to unsophisticated cyclists. Most tire makers cater to this by putting a very fine pattern on their tires, mainly for cosmetic and marketing reasons. If you examine a section of asphalt or concrete, you'll see that the texture of the road itself is much "knobbier" than the tread features of a good quality road tire. Since the tire is flexible, even a slick tire deforms as it comes into contact with the pavement, acquiring the shape of the pavement texture, only while incontact with the road.
People ask, "But don't slick tires get slippery on wet roads, or worse yet, wet metal features such as expansion joints, paint stripes, or railroad tracks?" The answer is, yes, they do. So do tires with tread. All tires are slippery in these conditions. Tread features make no improvement in this.*
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marketing stupid it's all the same
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wow that rotate trick is genius im gunna have to try it out
thanks -
any advice that's matured for 2 years is gonna be full bodied. Yum.
jonaent_(Jon)
Ratboy
willski
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hippy
Mr_Bungle
daccordi
Object
dogsballs
TheBrick(Tommy)
luke_bryan
kisu_shimo
wvm
MaxC
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About
Skid patches
Posted by
@tynan
I understand the maths behind skid patches (the simplification rule):
48 x 16 = 1 patch.
48 x 17 = 17 patches.
48 x 18 = 3 patches.
48 x 19 = 19 patches.
etc etc . . .
But surely this is hardly an issue - as if you find yourself with a gearing with a low skid patch number (let's say for example 48 x 18) and are wearing through in only 3 places - you would simply deflate your tyre (no need to take it off completely) every few days - rotate it a little to re-align the tyre and you are now skidding in three new unworn areas.
Is it as simple as this or am I missing something obvious ?