Thanks again folks. I really appreciate it!!!:)

That sounds like some sort of government standard. IF that theory is correct, it would seem that manufacturers would be allowed to err on the side of caution (:twitchy:MUST...NOT...TELL..PUN:twitchy:) and put a lower number on the sidewall, so that the MAXIMUM allowable inflation recommendation meets the halfway-to-blowoff standard. Just a guess.

+1 on the Silca. It's rebuildable and the only floor pump you'll ever have to buy.

Doesn't sound like any kind of standard to me. Doesn't it make sense, as Operator hinted, that different rims would result in different blow off pressures? That being the case, to be a meaningful standard the rim would have to be specified.

I've heard the 1/2 blow off pressure theory from various sources for decades. Nobody, however, has ever been able to provide me with a credible source. I'm thinking it's one of those urban myth things that should be put to rest.

Right.

kakashi, see if there's a pressure release button somewhere on the pump. Releasing the pressure from the hose before trying to remove the pump head will make it a lot easier on the valve.

Reminds me of the time when my neighbor was pumping up his mtb tires. He had two bikes to pump and he was using a hand pump. I was on my way to the shop, and I decided to walk, slowly, which'll take around 6 minutes each way, plus about 5 mins at the shop.

When I came back, this guy was STILL pumping, the SAME tire! He's hadn't inflated anything. I went over to help him out and realized he hadn't closed the airpump lock thingie (that locks the nozzle onto the tube's valve) :)

I went over, closed that for him, and the sound became different, he noticed resistance this time and said "Oh yeah I can feel the air going in now!" I went inside to bring my floor pump for him but by that time he went in to have tea or something.

Maybe floor pump models have already been mentioned, and I'd like to chime in with a Joe Blow. I liked it so much, I bought a second one coz it was going for a good price.

I am sure it's close enough. They have liability issues that you don't seem to understand.

I think that was more true in the past, but nowadays, rims are made more for performance and light weight than durability. I used to have rims that lasted forever, 20-years+. Modern rims needs to be replaced every 4-5 years due to wear from the brake-pads and many of them will self-destruct at the operating-pressure of the tyre from that wear!

I'm not sure even that's true. Back in the straight sided rim days tires were typically rated at 75 to 85 psi. A gas station air hose, at maybe 125 psi, would blow them off of the rim in a heartbeat.

Actually, you with your industry experience are the poster who I'd expect might have knowledge of a bicycle tire testing protocol. Are you aware of what it is?

Now that I have read that... I wonder why it never occurred to me before, it make perfect common sense. But I always pull the nozzle of quickly to stop escaping from the presta valve...

... good here... innit? :thumb: