My bicycle is about 25 years old and for the past decade has been sitting out on my balcony (dry, but outside temperature, which around here means from -15°C to +40°C or so). Lately I've been thinking about reviving it. Once I take it out for a spin I'll know what else I need to fix, but for now the obvious thing is the tires, which don't hold air at all anymore.
I wrote down the size numbers I found on them - 26x2.125 - but I don't know if they are tubed or tubeless. I suspect they are tubed, but I won't be able to tell until I dig the thing out. And it would be nice if I had the replacements ready by then.
So, my question - If I go into my LBS and buy the first tubed tires that I see with matching numbers on them - what's the risk they won't fit?