Topeak Mini Dual G Pump

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dee4life2005
Posts: 584
Joined: Sun Mar 04, 2012 21:01 pm

Topeak Mini Dual G Pump

Postby dee4life2005 » Sat Nov 03, 2012 21:57 pm

So I hit a massive hole in the middle of a cycle path last night ... they (I'm assuming the council) had been repairing bits, and left a two foot square section (2-3 inches deep!) without any signs and with it being wet the lights didn't show it up until I hit it :( Changing a tube, and refitting a gatorskin to a road tyre with numb hands in 3c temperature is not my idea of a good friday night ..

The old "snakebite" in the tyre, so fitted a new tube. Only had my Topeak Mini Dual G pump, which was doing okay at getting up to about 90psi - enough to get home at least. I did notice when I removed the pump that the valve locking nut thread was slightly bent (caused during inflation of tyre) - I didn't screw it all the way closed as I didn't want it to sheer off. I've had this happen before, only the nut sheered off the last time.

I've been searching the Internet, without success so far, looking for a tube that connects the pump to the valve so that I can avoid the pressure on the fragile presta valves while pumping up the tyre. Do you even get such a thing?

Or maybe I've just holding the pump wrong or something ...

bikaholic
Posts: 345
Joined: Fri Jun 05, 2009 16:49 pm

Re: Topeak Mini Dual G Pump

Postby bikaholic » Sat Nov 03, 2012 22:22 pm

Presta valve extenders might be one solution.

But, a slight change in technique is a better solution:

1. Rotate wheel so that the valve is at the 12 O'clock position;
2. Push the pump head straight on, the fingers of one hand hold the pump onto the valve while the thumb hooks around the top of the tyre to keep it and the wheel steady as you pump.
3. Pump at a steady rate.
4. Pull the pump straight off when done - don't wiggle it.

dee4life2005
Posts: 584
Joined: Sun Mar 04, 2012 21:01 pm

Re: Topeak Mini Dual G Pump

Postby dee4life2005 » Sat Nov 03, 2012 22:29 pm

Thanks for the reply.

I was doing all steps listed above, except for wrapping my thumb round the tyre ... just given it a go and it gives almost no movement of the valve when inflating. I think that was the trick that I was missing. Ta.


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