I am still learning, so for some things I still go to the bike repair shop. I was heading there and my tire deflated, so I was like "Ok, I am nearly there, so I'll have him patch that and save me the bother."
He then told me that it was not a puncture but a "scratch," and that it was because the tires are getting worn from the inside. That surprised me. I knew that tires get worn from the outside, but, from the inside???
I agreed for him to get me some tires, as it was something he had bought for another customer that never came back for them and he was giving them to me at 60% of the price, but I feel like he is just trying to sell me stuff for the sake of it and it just happened to be that I wanted to change tires.
Is that a thing? Wear from the inside?
(I mean, I used to go to another shop, but it is five-times farther away from this one. So when this shop opened up, I decided to switch to the closer one. But when I last asked the previous shop about my tires, they told me my tires were half life, and I wouldn't need a change until they worn a bit more, maybe six more months and that was just two months ago, in which I have used the bike maybe 20 mins a day, with the exception of a 60 km round trip last week)