tire construction/grip question

[Phil Esra <pesra@yahoo.com>]

(note: this email neither endorses nor condemns mandated use of street
tires in competition driving events)

Quick street tire question:

On one of my SP8000s, I'm down to some kind of secondary layer of
rubber on the shoulder. Is this rubber generally not as grippy as the
main tread layer? Time for some new tires?

thanks!

Phil Esra
'86 Civic Si ST

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