I have tried the combination plus-minus 3 & 5 PSI of company recommended 25 and 33. Haven't found much of a difference.
Now I retain F25 and R33. I read somewhere that the tyres have a operating range of +/- 5 PSI.
So your F30 and R40 should be ok. It all comes down to you preference.
I feel F30 and R40 makes the bike jump and hop on the potholes.




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