- Figuring out when my shoes wear down is not, IMO, a big problem. I can look at the soles and tell or I know after about 500 miles it's time to switch it up.
- That said, it is incredibly important to switch shoes (or replace soles) when they wear down. I've been fortunate to not run into too many injuries, but I've been hobbled more than once by not taking the time to get new shoes. There is definitely an opportunity for some shoe company online to send me an email every X months with a 20% of coupon for the SAME PAIR of shoes I always buy. I'm sure they could figure out how serious of a runner someone is by the shoes they buy or repeat purchases.
- Now, I might buy one of these to see what kind of data it stores because I believe the future of pedometers/activity tracking is they'll be cheap enough they'll come built into shoes. In 5-10 years I expect to buy shoes that come with a $5 pedometer/tracking device built in and that would be a killer feature. No FitBit to wear, etc., just something that shoes come with. That'll be awesome.