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10

It should be straight out, perpendicular to the rim. Otherwise you risk damaging the tube. When the valve stem is at an angle the valve isn't free in the hole – it is trapped by the edges of the hole where they bind the stem. The edges of the hole may cut the stem which will be moving a little bit as the tire and tube flex over bumps and the like. There ...


6

Tubes expand quite a lot as they are inflated - Try pumping one up on its own and see how quickly if expands (don't over do it unless you never want to use the tube again.). The way tubes and tires work, the tube holds the air in, the tire prevents the tube expanding. The 1.5-2.2 means the tube is suitable for a tire 1.5 up to 2.2 and is ideal for you 2.1 ...


4

I agree with your diagnosis: it must be related to the rim tape. Take it off and inspect it and the rim below. If you don't find anything obvious, buy new, good quality rim tapes, check there are no sharp edges, and reinstall.


4

I would say, you just didn't put the tire on well. When you inflate the tire to half its recommended pressure you should check that the tire seats well for the whole diameter around the rim on both sides. If it came out even a little, push it back in (may require some deflating). Otherwise the pressure may push the tire out like you had, and then the tube ...


4

I typed this whole answer and then decided to cut to the chase, which I doing here. IF you do not have a tiny splinter hidden in the tire I think you are pinching the tube between the tire and the rim during installation. This explains the flats at 50-60 lbs. Losing weight is not the problem. It might be part of the problem - that is to say that someone who ...


3

Firstly, you are one impressively persistent woman! Yes, of course weight is a factor. You just need equipment that will deal with it. In addition to the points made by jqning, I'm thinking that several things can help you Larger and better tires would help. I checked out the Electra website, but couldn't be sure which bike you have. Some do have bigger ...


2

Wow this is the flat tire question that just keeps on rolling In review: Installed a cheap 26 X 1.25 Problems from day one Patched tire with tire and even more problems exactly where the tire patch was Installed another cheap 26 X 1.25 and put in preemptive complete tire patch using the last 1.25 and nothing but problems Stop using: Cheap ...


1

Permutube are not good to ride on Middle ground is a heavier puncture resistant tire if you are running racing tires Spare tubeS, tire patch, tube patches, and a pump. Tubeless has a lower risk of failure but field repair is harder (you can put a tube in a tubeless).


1

Straighten it. All you have to do is let the air out, push the valve in straight and then re-inflate it. You may damage the tube near the base of the valve if you leave it as is when the tire takes a hit.


1

Your solutions have all pretty much been said, it seems to be a problem with the rim. However, instead of just checking the rim tape, check the whole inner rim to make sure there are no metal shards or other pokey things embedded in the bottom or inner walls. This happens a lot with v-brakes especially, so be aware. Speaking of brakes, I also wanted to ...


1

They say they take 65 psi, but I've had them pop at 55-60, so I keep them at 45psi, 50 if I can get away with it, and sometimes 35-40 if I'm using my little hand pump Well, there's your problem. 40 PSI is just not enough pressure for a 1.25" tire, especially if it's carrying a lot of weight. You're probably getting pinch flats from hitting potholes and ...


1

I'm not sure weight is the main issue. There are several questions on this site from people weighing more than you, and the general advice seems to be that it should be fine. Sure, more weight puts bike under more stress, but bikes are generally fairly sturdy. But make sure that there are no missing spokes, and check regularly if there are cracks in the rim ...



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