General Disc Radness (formerly disc wheel valuation thread)

Join the 'UK Time Trialling' Facebook group, a chap called Andrew Tamplin is making some adapters. I should get mine Monday/Tuesday and will let you know what it's like.

The hole in my -insert obscure unknown Russian- disc is too small to get the normal pump head in and I had to get a screw-on 90 degree adapter for the valve. Problem is the pressure just makes the pump head blow off the adapter. It's a bit rubbish.

Use something to wedge it in place. Whittle a cork?

Find a friend to help hold it in place, that's what I have to do...

sure the pump head isnt shit?

My russian four-spoke and pair of discs are all flat for the same reason. Tried and failed with a 90 degree. Interested to see what the adapter @Pifko is buying will be like.

The tube on the adapter is a smaller diameter than a normal tyre valve, so the pump head doesn't stay on. Just slips off once the pressure goes up. I'm currently resorting to using a cable tie to hold it on, then cut it off afterwards. Not ideal.

Could you shim the tube of the adapter out a bit with a few layers of electrical tape?

wierd, I have had 5 or 6 of these little "crackpipe" adapters over the years and never had that happen before

Received yesterday - I'll get a photo up later when home from work.

It's essentially made up of 2 parts; a small screw-on adapter that screws directly onto the valve core and a J-bend valve which then screws onto the adapter. So once you have screwed on both parts, there's no way it'll come loose...unless you strip the threads.

Looks neat and I'll give it a go later

So it's not so different to my makeshift solution I'm using already? After posting the other day I managed to get all the tubes inflated, but it was so damn fiddly the smaller cavity on the trispoke.

This was the Presta/Schrader adapter from a Lidl milk can, plus 90º bend from local bike shop. Total cost was less than a fiver I think. Was hoping the one from TT forum would be a little more....more. Main issue for me is that it's Schrader on the backside.

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Yep, essentially looks the same. Was something like £7 posted, which I'm fine with.

Yup, sounds totally reasonable. Saves me £7 if it's nothing more or less. Interested to see pics anyway.

Milk can?

Emergency tyre sealant, looks like milk.

Pics

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Has anyone tried this one:
http://www.lezyne.com/product-dpumps-acc-abs2chuckhv.php
Lezyne abs chuck HV

https://www.bike24.com/1.php?content=8;product=151908;menu=1000,5,71

Looks like it would work in discs and tri spokes and has a lock...

I've used the Topeak version. Fiddly and couldn't get it to work so gave it away.

This one?

Topeak TFV-03

What was the irritating thing? Fiddly/no room to lock on or just not sealing at all?

^ That's the one I've got that I was complaining about. I wouldn't describe it so much as fiddly, but the pipe is very skinny and my pump head blows off it. It's also got a spring loaded internal one-way valve which can make reading the pressure a little hit and miss. I don't like it.

Once you have the adapter on the valve head, there is no room for fat fingers to screw on the adapter. The adapter myself and @pdlouche are using work much better. A proper expensive locking Hirame adapter would be the best option though :) £££

okay :)

After actually watching the demonstration video, I found out that you still have to thread the lezyne chuck on to a Presta valve (looks pretty easy for schrader...)

https://www.youtube.com/watch?v=Rme63HxMS7M

@varno stocks a Hirame copy and it's well worth the money.

Its good, but won't fit ambrosio or newer zipp discs with smaller valve holes with all makes of tubs.

Thanks, noted!