Also have 19" Glendales but no issues or concerns flagged up when having worn or punctured tyres replaced.
In early 2013 whilst having an alignment check, discovered that the front nearside tyre was shredded on the inside but that was down to pothole damage which had bent the inside rim of the alloy. Both the Glendale and tyre had to be replaced. Saw the alloy damage first hand and it was quite severely bent, so explained the tyre damage.