Hi,

I'm sorry for asking very basic questions. I'm trying to break my dependence on the bike shop and I've vowed to do as much maintenance as I can by myself. But I'm very new to this.
I have had a Fuji Touring series III for a few weeks and the tube in my front wheel just blew up. I'd just bought and tried a foot pump on it and had gone for a ride. It exploded as I was parking the bike : not riding and no weight on it, so I'm assuming I put too much pressure.

1st question : my tire says 85psi, which is exactly where I stopped pumping, according to the gauge on the pump. What should I make of this : is the gauge possibly faulty and I put too much without realizing (it's a cheap ccm foot pump...), or is the 85psi mark on the tire an absolute maximum and I should actually keep the pressure under that?

2nd question : the size on the tire is 37-630 (27 x 1-3/8). I'm trying to determine if a spare tube that I have here will do. I've been reading self-help pages and I don't think so, but I thought I'd ask here to make sure. My spare tube is a «700 x 28/32C (27x1-1/8x1-1/4 a/v)»
If I get this right, the last bit (1-1/8x1-1/4) is a range, and thus it won't fit in a 1-3/8 tire... Am I right ?

Thanks greatly in advance for any input.