My 7200 Trek has factory rims. I don't EVER ride it off of pavement (with the exception of 100 yds. from the driveway to the paved road).

The bike now has the original 700X35 tires on it.

I want to go with a more narrow set of tires, probably more like slicks to reduce weight and resistance. No off road hybrid consideration. How skinny of a tire can use on the stock rims.

I'm not looking for brand or model reccomendations........just size.

Thanks,
Greg