Maybe it is Korean Giant, which is later in the season. See is skin color changes or taste improves. They get ripe on the tree.

In my zone you pick them August 27 are they be gritty deer eat off tree here september 5th give take day are 2. They tobe pick store in dark cold dry place like pantry shelf until ripen then want be gritty but very smooth and sweet. This take about 2 to 3 weeks after picking. Yours gritty should been pick August 1 st or before that date. If next year yours get ripe before 2 weeks pick 10 days earlier next year until you get good pick date of your own. I never saw pear that could not be heavenly good. Hardest pear soften and sweeten given time by sampling.