I had a flat tire the other day on a Panaracer tube.

While I was out on the road, there was so much traffic noise. I could not find the leak in the tire, nor in the tube, so I simply replaced the tube with my spare.

After I got home, I found there is a small pinhole leak, but it is on the rim side of the tube. I am going to now take the spare off and see if I can find a spoke or anything that might’ve caused that small puncture.

Two questions:

First is it worth patching tubes or considering the cost of a new tube should I just simply toss that one and replace it with another new one as a spare?

Secondly, where this pinhole is located, is in an area of the tube that has some very slight ridges going around the tube. Can that area be patched or can only the smooth part of the tube be patched?

Thanks so much for helping the still learning rider here.