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since temps tires and surfaces differ, I would suggest using the chalk method, and start at 39F/36R, and see if you are rolling onto the tire shoulder. If so, you need more air.
It's more likely that you'll wind up around 36F/33R, but again, that will differ greatly on differing concrete versus tarmac surfaces.
Use chalk. It is your friend.. and keep checking pressures throughout the day and keep a log for what works best (including tire and ambient air temps).
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