This past spring brought Canyon Endurace8 with just under 400 miles on it in for a tune up to get it good to go for a bike fit and to fix anything I may have not done properly when I assembled it, which according to them wasn't the case. They replaced my chain ($50). I didn't maintain the bike as much as I would've liked to during the 1st 400 miles.
Can a chain get to the point of needing to be replaced that quickly? Could the way I ride (shift) have made this possible?
I may be a novice, but I avoided cross-chaining and I try to shift at the proper pedal strokes, though admittedly maybe during the first hundred or so miles I didn't as I learned from the internet and riding w/others. Most of my rides don't involve much elevation change.
Also, is it normal for a shop to do a $50+ item without giving you a call?
I would've like to have had some input on the chain used to replace mine, though I'm assuming since they didn't ask they used one comparable to what was on there. Just like with my car, trusting the people at the shop is just as, if not more, important than what they charge for service/parts.