I have some new road wheels with a deep rim.
I've bought a Topeak valve extender but having trouble inflating them as air just seems to come out like there is not a good seal with the track pump.
Can get to around 80psi but no more. Usually run around 120 so some way to go.
Anyone else had this problem and can offer some advice?
MM
Might be the extenders are the problem .
Can you not just buy tubes with longer valves?
Only way I can inflate the shorter valved tubes with deep section rims is by using a pump with a screw on hose, rather than the press fit type.
Believe me, 110 psi takes a very long time and I feel like my arms belong to a teenager with his first internet connection.
I think longer valved tubes are the best solution.
When I had a set of deep rim wheels ,the extenders I used were just simple brass tubes ( no second valve built in ).You had to undo the valve,screw them on ,put air in ,then take them off and shut the valve.
Bit of a faff ,but there was never any problem with the pressures .
They are already long valved tubes so have no choice but to use extenders.
Need something that will accept a co2 inflater as I don't do pumping!
What a faff grr
MM
You use CO2 inflators instead of a track pump? You have too much money. 😕
I used Conti extenders, which one used in conjunction with removable valve core tubes, you put the valve core in the end of the extender, never had any problems. Many others seem to just go onto the end of the tube as is, which don't look as good.
How deep are your rims? Presumably extremely, if you've already got LV tubes? I found 60mm valve Conti tubes worked without extenders in 50mm Bontrager rims.
IIRC the Topeak extenders aren't that great.
I think my latest set of extenders are Vittorias. These just screw over the existing valve. You can get some that require taking out the original valve, inserting the extender 'upside down' and then reinstalling the valve core.
Oh and as an aside, have you every had a problem with a co2 inflater that's involved you using it up and still not getting the tyre inflated? A manual pump wins every time imo.
How deep are your rims?? I'm using 60mm valves on 40mm deep rims and there's loads of valve poking out. I'd be comfortable using them on 50mm deep rims.
Saying that, I used the Topeak ones for about a year, the ones that look like a presta valve, you unscrew the bit at the top of the extender that in turn unscrews the valve. Inflate, re-tighten. No problems.
No I have a track pump at home but use Co2 on the road. It's not working with the track pump and dont want to be stranded with a roadside puncture.
The wheels are 52mm Mavic cosmic carbones. Maybe they are not 60mm tubes inside. (They come with Mavic tyres and tubes already attched).The valve end just about pokes out but no where near enough for a pump to attach.
They are the same extenders I have LardLover. Just on using the pump all the air is just gushing out around the pump head.Pump works perfectly on a normal presta valve.
I'll take the tube out tonight and measure the valve. Extenders should work though!?!
MM
Hi,
A lot of tube manufacturers make a tube with an 80mm valve (spesh/conti), you could give these a try (in my experience these seem the way to go but you just need to remember put them in your saddle bag!!). There seem to be two typres of valve extenders; one is a metal tube that you screw on the existing valve stem (open the valve first), when I have used these they have been supplied with a tiny rubber O ring that you use as a sea,l the other type are the ones that you need removable valve cores for and some manufacturers supply these with O rings and some don't, the ones 'with' seem more reliable...
MountainMutant - MemberThey are the same extenders I have LardLover. Just on using the pump all the air is just gushing out around the pump head.Pump works perfectly on a normal presta valve.
Stupid question (sorry!): The extender isn't unscrewing a little whilst your pumping is it? (torque from the pump hose?)
Try a 60mm valve in there, then buy a load off ebay. They come up quite often (5 Continental's for £12 or something).
No, air escapes at the top not where it attaches to the valve