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Old 07-23-2011, 07:18 AM   #1
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Default Performance difference between brand new and nearly knackered Sorex 28's?

Quick one, what sort of performance difference is to be expected from a brand new set of sorex 28jb's compared to a set that is pretty much on its last legs? (ie belt pretty much coming through).

Racing on carpet track with lap times around 14 seconds.

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Old 07-23-2011, 12:24 PM   #2
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When we had Sorex 28 as a control tire in Denmark, my experience was that we used new tires at a race, and then used them for training until the next race. They drop off a couple on tenth's, but still feel decent. If you don't race a lot, then put on new tires when the rear starts sliding.
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Old 07-23-2011, 12:32 PM   #3
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I find they are a very soft rubber which is what makes them so grippy, but they are so soft that i found the sidewalls would start to rip(the rubber itself). Once this happens they can become inconsistent, but if you regularly maintain the sidewalls with ca glue you can definitely get a lot of life out of them, even running them down to the bead.
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Old 07-23-2011, 10:15 PM   #4
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Simple question... About 1 lap.

A new set of tires is worth about .2 to .3 tenths per lap.. Works out to a lap or so per 6 min race.

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