I picked my bike up today from the bike shop where I'd taken it on Thursday for a service. Everything looked, sounded and felt good as I rode home.
I was almost at the end of my journey when I noticed something wasn't right at the rear of the bike. I stopped and felt the rear tyre... yep, it was flat. I had a quick look at the tyre surface to see if I could find any entry wounds, but could see none. The bike shop had to put in a new tube and change a couple of spokes and I started to wonder whether this might have been the cause.
Well, I've just taken the tube out and the puncture is on the inside of the tube: a little half moon slit, much like a sharp fingernail would make, with a little hole at one end. Clearly, it's nothing I've done or ridden over, so it's either a faulty tube or the puncture was made at the time the tube was put in. I've had a cursory feel on the inside of the rim and can't feel anything sharp.
Should I be able to take it back to the shop and have them fix it free of charge?
I would be knocking on their door first thing tomorrow
If you don't know what caused the puncture how can you blame the shop?
How long was the ride home? Tubes are consumables, I would just fix or replace it and go for a ride. keep the old tube and if you get another puncture in the same place then take it back to the LBS.
10km. It's not beyond fixing myself.
I reckon it's most likely a problem with the rim tape not covering a spoke hole.
It sounds more like the rim tape. If it is it will keep happening until the tape is replaced. I'd take it back to the shop & discuss it with them. The tape isn't very expensive & they may offer to replace it. If not it's not the end of the world, just buy one.
Sounds a bit like a "snake-bite" - wheel takes a whack and the tube gets cut by the rim bottoming out. Have had them a few times when MtBiking that's why people run tubeless tyres. One usually gets 2 cuts that appear as parallel "lines", the tyre typically deflates very quickly.
Still, I have had a few times over the years "mysterious" pin-prick punctures on the inside of my tube with no discernible cause. A quick patch and away :-) Go figure.