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Tubes
May 1, 2021 22:50:02 GMT
Post by gazw on May 1, 2021 22:50:02 GMT
Anyone on here run with innertubes on their superdreams without any problems ? For as long as I can remember my front tyre goes down over a period of about a week, must be a leak from somewhere , Ive even had the wheel off and taken it to someone to try and re seat the tyre on the bead this did work for a short while but now the tyre is going flat again , so I was looking at fitting a tube instead to see if this would work
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willy3pigs
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Tubes
May 2, 2021 6:44:03 GMT
Post by willy3pigs on May 2, 2021 6:44:03 GMT
My U.S. import CM400 had tubed tyres from new, I had to drill the rims to accept tubeless valves. The valves on the tubes were a smaller diameter than the sealing portion of a tubeless valves by about 3mm. So if you fit a tube the valve may be a loose fit in the hole in the rim, but the valve locking ring might obviate the problem.
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Tubes
May 2, 2021 9:33:44 GMT
Post by reversespin on May 2, 2021 9:33:44 GMT
Hi
I'm currently running a tubed rear wheel on my CB400NB.
I did not experienced any problems, but, I hope when I recommision the Bike (its currently in a total engine strip down)to clean up the rear wheel rim so that a new tubeless tyre will seal ok.
I think the main issues with tubed tyres when fitted to a tubeless rim is not so much the valve being smaller, but, rather if you get a puncture the tyre will generally deflate quicker than a tubeless (which is not a good thing on 2 wheels), that was what I was told by a tyre fitter back in the 80s when I had Tubes fitted to Tubeless Rims that kept on deflating until I took them off and thouroughly cleaned the rims and fitted new tubeless tyres.
If there are any tyre fitters out on the forum they will give the correct advice.
Anyway new rubber will always seal better than old and I think if the rims are cleaned up and new tyres fitted will probably cure your problem, but, you do need to get the old tyres off and examine the Rims particularly where they seal with the tyre.
Failing that if you have a friendly tyre fitter they should be able to advise.
Best of luck hope that helps.
Phil
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Tubes
May 2, 2021 9:45:13 GMT
Post by grahamb on May 2, 2021 9:45:13 GMT
I have tubes front and rear on my sd ,been in for several years
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Tubes
May 2, 2021 11:05:52 GMT
Post by na44superdream on May 2, 2021 11:05:52 GMT
If you fit a tube to a tubeless tyre and rim, the speed rating on the tyre cannot be relied on, as the tube may rub against the tyre, potentially generating more heat. It is best that the tubeless tyre is relatively smooth inside. So an H rated Tyre may be a S rated tyre with a tube fitted. (very approx example)
One major manufacturer suggested (I read many years ago, no longer mentioned I think) a top speed of 131kmh/82mph may be advised.
I've a CB250NDB front wheel that wont hold pressure for long and it does seem to be slight rim corrosion that is the cause.
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ian
Member Of The Year 2019
Isle of Man
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Tubes
May 3, 2021 20:56:26 GMT
Post by ian on May 3, 2021 20:56:26 GMT
I bought a set of Cobra Super Slots for my TR6 in 1977. This was the early days of alloy wheels & within a few years the tyres started deflating due to porosity in the alloy, which was a common problem back then. They were tubeless tyres & rims, but I fitted tubes from then on & never had a problem - had the car for another 20 odd years. Several of Gill's bikes have had spoked wheels with tubes & tubeless tyres without a problem.
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terryc
Forum Accommodation Specialist
I'll put you up ,plenty of room in my box
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Tubes
May 4, 2021 0:28:56 GMT
Post by terryc on May 4, 2021 0:28:56 GMT
My CM had a slow leak on the rear tyre when I got it ,when I took it in to have a new tyre fitted I told him about the leak, he sorted it for me, turned out the inside of the rim had been painted and in places had flaked off so you had paint no paint around the rim and that's all it was the thickness of a coat of paint .The previous owner had the tyre refitted before I bought the bike but his tyre fitter can't have been as good as mine .
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Tubes
May 4, 2021 9:10:55 GMT
Post by na44superdream on May 4, 2021 9:10:55 GMT
I bought a set of Cobra Super Slots for my TR6 in 1977. This was the early days of alloy wheels & within a few years the tyres started deflating due to porosity in the alloy, which was a common problem back then. They were tubeless tyres & rims, but I fitted tubes from then on & never had a problem - had the car for another 20 odd years. Several of Gill's bikes have had spoked wheels with tubes & tubeless tyres without a problem. We had a problem on our year 2000 Mondeo MK2 zetec Cosworth style wheels, It was eventually traced to corrosion between the alloy and the bolt on valves!
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ian
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Tubes
May 4, 2021 20:33:13 GMT
Post by ian on May 4, 2021 20:33:13 GMT
Maybe they haven't solved the problem entirely yet then?
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