65mm deep sections track pump

tonyhogg

I'm having trouble getting anything over 80psi in my new 65mm deep section carbon wheels, I've got 80mm inner tubes in but they are the smooth valve type and the track pump head doesn't seem to be getting much of a grip before it blows off at around 80psi or below. I've got a rubber grommet in the valve hole to stop rattle but even with this removed the track pump head can't get a good grip? Any tips or suggestions what I could try next? Valve extenders, different type of pump?

JackPozzi

I found my old joe blow pump suffered something similar, can't say I ever found a reliable cure other than when the pump failed I bought a Lezyne pump with screw on head which has been faultless

Grill

+1 for Lezyne

bob6397

Yet another +1 for Lezyne pumps.. and multitools.. and saddle bags..

(I have a Steel Drive floor pump, a pressure drive mini pump, a RAP20 multitool, a SV10 multiool and a Microcaddy.. Never had any issues with any of it and I absolutely love the screw-on pumps.. Slightly slower but it works every time unlike a push-it-on-and-hope kind of pump )

Matthewfalle

Valve extenders or just hold it on with one hand and pump with the other (I tend to use this technique when pump head is worn and have no issues getting up to the 140psi I pumped them up to yesterday).

bob6397

Matthewfalle wrote:

hold it on with one hand and pump with the other

Don't know about the OP, but I know that I am not enough of a contortionist to make this work and still get enough weight behind the pump to get air in at 140psi..

Alternative: (Best £30 I ever spent) http://www.wiggle.co.uk/lezyne-steel-fl ... rack-pump/

jgsi

JackPozzi wrote:

I found my old joe blow pump suffered something similar, can't say I ever found a reliable cure other than when the pump failed I bought a Lezyne pump with screw on head which has been faultless

Yup the Joe Blow is a pain for some valve heads.. I wrap some tape around the valve to give more grip... but still not brilliant at getting over 7bar... Vittoria red seem to be the most annoying. Michelin smooth valves just grip.
Schwalbe One tubs seem ok with the Joe Blow... just these Vittorias

Matthewfalle

bob6397 wrote:

Matthewfalle wrote:

hold it on with one hand and pump with the other

Don't know about the OP, but I know that I am not enough of a contortionist to make this work and still get enough weight behind the pump to get air in at 140psi..


Alternative: (Best £30 I ever spent) http://www.wiggle.co.uk/lezyne-steel-fl ... rack-pump/

Errrr - its not that difficult. Valve at 12 o'clock. Valve head on. Hold on. Use other arm to pump, At about 120 psi when there is a tad of resistance just put some weight behind it.

Its a bicycle tyre not a space shuttle.

Maybe a course of man up needed?

tonyhogg

Might give the Lezyne track pump a try, currently using a decent topeak track pump not the basic version the silver one, definitely can't get anywhere near 120psi one handed and holding the head on, cyclists arms!

sungod

on my sks track pump the chuck holds fine to at least 10bar*

but my lightweight lezyne travel floor drive pump with the slip chuck (used because the lezyne screw-on chuck wears out very fast) will blow off around 5 bar, but that's easy to solve, i just use a couple of elastic bands to hold it on, works very well and only takes a few seconds, then it too holds to at least 10bar, the postman delivers a few new bands per month so there're always plenty to spare

so i suggest save your money and just use a couple of elastic bands (put band over hose next to head, fit head to valve, loop other end of band around edge of wheel and onto the head from the other side)

bob6397

Matthewfalle wrote:

Errrr - its not that difficult. Valve at 12 o'clock. Valve head on. Hold on. Use other arm to pump, At about 120 psi when there is a tad of resistance just put some weight behind it.

Its a bicycle tyre not a space shuttle.

Maybe a course of man up needed?

Possibly.. Still think that it is a little impractical when you can just get a pump that means you don't have to hold on..

(I'm under 9 stone though so putting my weight behind something requires all of it!)

bob6397

simon_masterson

If you're under 9 stone then you shouldn't be needing much pressure anyway!

bob6397

I don't.. just making the point that it isn't practical to have to hold your pump head on the valve so that it doesn't fall off when there are alternatives out there!!

(I personally run 80-85psi in my 25mm tyres..)

bob6397

Matthewfalle

bob6397 wrote:

Matthewfalle wrote:

Errrr - its not that difficult. Valve at 12 o'clock. Valve head on. Hold on. Use other arm to pump, At about 120 psi when there is a tad of resistance just put some weight behind it.

Its a bicycle tyre not a space shuttle.

Maybe a course of man up needed?

Possibly.. Still think that it is a little impractical when you can just get a pump that means you don't have to hold on..

(I'm under 9 stone though so putting my weight behind something requires all of it!)

bob6397

Agree that it's impractical but I only have to do it when my pump head is jack. Rest of the time it's fine - pump head on, pump away. Jobs a fish.

either extenders or new pump - your call really.

oldwelshman

Pump it with the valve at the bottom of the wheel and not the top

foggymike

Just get a Lezyne hose and screw on chuck (see below, you might get it cheaper/free post if you shop around). The hose fits on other brands - I've used one for years on my joe blow. No worries any more and much cheaper than a new pump if yours is otherwise fine. It really is a no brainier.

http://www.tritoncycles.co.uk/accessori ... tAodcC0AeQ