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How far do you ride before you trust your tires? Any rules of thumb, on say a 75F degree day with street tires?
 

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When they dont slide around, haha.

That probably not very safe practice for the street but on the track they will usually slide around on the first three or four corners (before I bought tire warmers) and then they are good to go. On the street... I usually dont push hard enough for it to be a concern... If i'm going on a nice canyon ride in the summer though I will run the first few corners and then I feel comfortable on them. But again, i'm not out dragging knee's in the canyons... I made that mistake once before.
 

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with street tires...... 1 or 2 miles (depends on the manufacturer) with aggressive braking and acceleration.....

this heats the tire up...the compression and flexing of the carcass generates the heat.
 

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On the street, one thing that can bite you is the lunch stop. Since you've been out already and are warmed-up yourself, it's easy to overlook the fact that the tires have cooled. Don't assume or get overconfident. They cool fast. And heat depends on the tires. Some take longer to warm up.
 

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when the light on the tire warmers says so! :)
 

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On the street, one thing that can bite you is the lunch stop. Since you've been out already and are warmed-up yourself, it's easy to overlook the fact that the tires have cooled. Don't assume or get overconfident. They cool fast. And heat depends on the tires. Some take longer to warm up.

this is why i always park in the sun if on a lunch or gas/snack break.....most of the guys try to park in the shade..... and their tires cool.....

now you know one of my little secrets.
 

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I was under the impression that tyres had an optimal operating temperature which was determined by a number of factors related to the manufacture of the tyre (competition, sport, touring etc).

Road tyres are designed to operate at road temperatures (temperatures generated under road use) while comp tyres operate at a different temperature, usually a lot higher than raod tyres due to the increase in heat generated on a track (basically higher speeds and harder accelerations/decelarations).

To make it even harder the tyre pressures and loads on the tyres (solo, pillion, luggage even weight of the rider) also effect the tyre adhesion.

Then there is the age of the rubber, previous useage, even whether the bike is parked outside in hot or cold weather for long durations.

As an indication for a track day a general recommendation is that tyre pressures are set cold at 30 psi front and back with two laps warming up both tyres and rider. Then adjust to suit.

For road use I'd recommend getting the tyre pressure correct (checking before each ride), covering a few miles to generate temperature in the tyre and then having fun. A starting point is the manufacturers recommendation.

Consideration should also be given to changing both front and rear at the same time (even if there is milage left on one of the tyres) and making sure the tyres are matched (same manufacturer and even same tyre - seem to recall reading that manufacturers now designing front tyres to assist with rear tyre traction in the wet).

It's amazing how confidence inspiring a good set of properly inflated and warmed up tyres can make to ones riding.
 
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