Road Cycling - how to pump up a tire?

Ended up walking home today cuz somehow the rear tire got pinched when i didnt see this drop-off in the asphalt.

Checked the tube and the hole was too big to patch so i bought a new tube instead. Now im rdy to inflate the tire to where it needs to be and it wont go. When i pump up the tire, it will inflate till it kicks air back into the pump itself, as if the pump cannot handle such high pressure.

I can sit on the bike and the rear tire is not fully inflated at all. I certainly do not dare ride like this.

Does this mean i need to get a really good pump and that my current pump is too weak to pump a road bike tire? My mtn bike tires pump up just fine but i know mtn bike tires have way less PSI.

Or am i doing something wrong? Plz enlighten me!
:)

It could well be your pump, if it's a mini-pump. Alternatively it could be a problem with the valve - is it Presta or Shrader?

Richard

Maybe you haven't free'd off the valve properly, so pumping against a stuck valve.

It could be your pump. Does your pump have two inlets; one for Schrader and one for Presta?

My pump is like this and have had a similar problem from time to time.

The question isn't pertaining to deviant sexual acts is it?

I'm having a similar issue .. can't pump past 90 pounds which means I can't ride my bike because I need to be between 100 & 120. I think it's the pump. My wife got it a few years ago and is a cheapy.

Presta valves:
1) remove valve cap (if present);
2) back off the stem nut until it stops turning;
3) depress the stem with your finger to let out a burst of air and free up the valve seat;
4) make sure you have the pump head inserts in the Presta orientation or are using the Presta orifice;
5) press the pump head securely onto the valve stem;
6) move the pump head clamp lever (if present) to the appropriate position for pumping;
7) go for it!

Schraeder valves (preferred approach):
1) buy three Presta-valve innertubes in your size;
2) buy two washers whose inner diameter matches the OD of a Presta stem, and whose OD exceeds the cutout in your rims;
3) remove tyres and Schraeder inner tubes;
4) insert Presta tubes into tyres, inflate slightly;
5) slip washers over valve stems;
6) mount tyres and follow inflation instructions above;

Schraeder valves (alternate approach):
1) if topping off an inflated tube, press on the valve stem to loosen the seal;
2) make sure the pump head inserts are in the Schraeder position;
3) press the pump head onto the valve stem;
4) move the pump clamp lever, if present, into the proper position for inflation;

Cheap pumps are rarely able to do more than about 100 psig, even when new. This doesn't seem to be a problem for the ATB crowd, since most of their tyres need 70 psig or less. When you run 145 psig, you really need a good pump!

Yeah, it's probably just the pump, or you might not be putting the head over the valve all the way, but more likely the pump if you've tried many times. Average road pressure is of course extremely high. The compressor at the shop that I work at on a good day can only hit 90, and then I need to do the rest by hand.

If your looking for a pump that can do it though, I would look to the trek floor pumps or somthing from topeak. If you have the money though, go for a silica. They have the best build quality, and can usually reach the highest pressure, but of course, you get what you pay for.

Nashbar has a good floor pump at a good price ($22.00)

I have one of these and I like it.

See http://www.nashbar.com/profile.cfm?category=&subcategory=&brand=&sku=2420&storetype=&estoreid=