2017 Ford Transit Connect Tires

Good first. The tires are lasting it’s close to a year. The tread is ok. I travel a lot and haven’t had to replace the tire just yet. Now Bad. The stem leaked on all 4 tires so I had to get stems replaced on all 4 tires. Within a week of putting these tires on. Then as the weather changed the tires will go down. So I had to buy an air pump in case the tire went down which was about 8 times all together.