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V

Vince

Hero member
For years I have been struggling to check rear tyre pressures and add air to my 3c. Approx 80% of either tyre gauges or pump attachments don't fit with the big rear brake. I had one of those addon valve extensions fitted for a while but it slowly failed and left me stranded with a flat tyre on a couple of occasions. I knew that there are 90deg valves available for tubeless wheels but I had no idea you can buy tubes made with 90 deg valves fitted. So next time I do a rear tyre I am going to find and fit a tube with this code TR87C. That's a tube with a central, not offset, metal valve at 90degs. Just wish I know a week ago when the new rear tyre went on. Anyone tried these tubes?
 
I have used a 90 degree valve adapter for decades, on spoked and cast wheels, it is carried on the bike seperately and fitted when needed, I have another in the garage for checking when at home, but my recently bought digital pressure gauge fits without the need for the adapter, which is a help, after my decades old "clock" type gauge failed, no need for special tubes or valves (on my Pan European), also difficult to get an air line on due to the 17" rear and shaft drive bevelbox (or diff as people wrongly call it)
CLEM
 
Vince said:
For years I have been struggling to check rear tyre pressures and add air to my 3c. Approx 80% of either tyre gauges or pump attachments don't fit with the big rear brake. I had one of those addon valve extensions fitted for a while but it slowly failed and left me stranded with a flat tyre on a couple of occasions. I knew that there are 90deg valves available for tubeless wheels but I had no idea you can buy tubes made with 90 deg valves fitted. So next time I do a rear tyre I am going to find and fit a tube with this code TR87C. That's a tube with a central, not offset, metal valve at 90degs. Just wish I know a week ago when the new rear tyre went on. Anyone tried these tubes?
Click to expand...
Yes Vince got em on me 10inch 1971 Z50 ole school :cool: surely as a tradie youve pushed a wheelbarra or 2 with a 90 degree stem ;)
 
The adaptor just statted leaking, I would check the pressure at home and by the time I was heading up past Hornsby on the expressway it would feel loose and a check at the 7.11 would show 15psi, It varied with the loss, I arrived out of Yong after I had thought I had fixed it the next Sunday with it completely flat. I stopped using it after that. These tubes are available in 18 inch and big enough to suit my 140.
 
That's the style of adaptor I was using, it was fired permanently for a few years before it failed. I always use steel valve caps so centrifugal force should be covered. I just want something simple that doesn't lose air when swapping out or checking with the digital gauge. I cannot see a downside as they use the same when bolting into tubeless rims. But like fing with brakes, I am to be carefull
 
I use this type of adaptor when I’m en route:
78.59.a9.10009880910FR16.JPG





I never would leave a 90° adaptor constantly installed.



My home compressor hose is equipped with this type connetor:
450354081.jpg





No issures whatsoever to reach the rear wheel valve with it – I just bend the hose to an 180° loop – just works fine …
 
So much for that plan, I got the idea from another site where a bloke was saying his bike had that type of tube and I got all excited when I found a site that speced tubes and 90 deg versions were listed there. And it probably does, as it's a cruiser. Bridgestone do 15 and 16inch versions and there are a couple of other manufacturers that do as well but zero bigger than 16inches.
 
As mentioned, just stick the 90 adapter in your pocket.

In my humble experience, if your tyre pressures need checking often, you have a problem to start with.

Paul
 
I have the gear at home, compressor with gaugue attached but the petrol station ones never fit. This will get a reaction, last ride I went with 34psi in the front and the bike was all over the shop on the goat track we were on, so it's back to 37. Yep, I can feel the difference in 3 psi. I always check pressures before a ride and it would be nice to make it easy to do. BTW I was probably hanging on too tight as well, its been 4 months since I rode at all. Poor posture, lacking core strength and gripping the bars too hard would all apply as well. But Its defiantly the tyre pressure, MAYBE
 
Thanks, Cam, I just rang Cassons the Oz distributor and asked about the part no and they have it but it's a standard straight type valve tube and he looked at Metziler website and could not find a tube in 18inch with a 90deg valve. He reckons that USA site is wrong. So I emailed them and will see what happens.
 
The gadget allows air to leak out when removing it, doesn't matter how fast you are. I am over juggling this when it looked like I had found an easy fix. Heaps of tubeless wheels have 90deg bolt-on valve adaptors, some bikes have these style tubes and I just heard from someone who has a 17inch tyre with one fitted. It seems like an easy long term fix for what I want. It's not an attack on Motherhood, just something I wanted to look at to suit me.
 
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