Hello fellow bike riders, glad to meet you! Yes, this is my first post and I joined specifically to ask this question:
I'm riding a Miyata road bike, a 12 speed. Just brought my bike to a shop for the first time in my life (I've always done my own repairs). Had a bunch of stuff done so I can ride the hills again. It would have taken me over a week to do the stuff that needed doing, would have needed at least one new tool to disassemble my bottom bracket, decided to find a good shop and have it all done at once, which I did.
I have been riding Kenda K161 27 x 1 3/8" tires (a lot of the roads are very rough around here and the thicker tires help with that). I always ride with polyurethane liners in my tires, cuts down on my flats frequency tremendously. I actually glue them into my tires using contact cement to get them centered in place.
I came upon a thorn proof tube and put it in my back tire a few months ago. It was about 11 ounces, had one patch. Don't remember if I put that patch on myself, but a few days ago the tire went flat because a slow leak had developed at the edge of the patch, and I discarded that thorn proof tube. I have put in a regular 27 x 1 1/4" tube, but figure I'll lower my already low frequency of flats by inserting thorn proof tubes (I hate flats, of course nobody likes flats!).
OK, so I go on Amazon and order three thorn proof tubes, Sunlite Thorn Resistant Bicycle Tube 27 x 1-1/4 (700 x 30-35) SCHRADER valve. They are $8.29 a pop:
I received them today, am amazed how heavy they are: 15.59 ounces. My other one was 11 ounces, the regular tube I just put in was 4.8 ounces. So, obviously these are thick and relatively rigid compared to ordinary 27 x 1 1/4" tubes. Is it OK to use them in my 27 x 1 3/8" tires?
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One other question: Looking at my settings, there's one item that I have a question about. What is the default thread age cutoff (i.e. 30 days, 90 days, 120 days, year, all)? It doesn't give a clue.