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Author Topic: Fitting Tyres n Tubes  (Read 174 times)

sylvaman

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Fitting Tyres n Tubes
« on: 14 February 2021, 10:03:25 pm »
Not sure if this has been covered before , But came to fit tyres n tubes today  (first time on motorbike wheels ) , usually doing them on my road bikes.
 Anyway ; two nuts on the Inner tube valve ;  One either side of the rim or both on the outside, just leaving profiled washer inside the rim  ?

Chris L

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jim

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Re: Fitting Tyres n Tubes
« Reply #1 on: 15 February 2021, 06:18:54 am »
I have been putting the profiled washer on the inside with the tube. The nuts can be locked together with a small gap from the inner rim so if the tyre moves on the rim and pulls the tube with it the valve will move over to an angle. (This won't happen on CK lawnmower engine) You can see if the tyre has moved because the valve stem is at an angle and you can then move the tyre and tube back before the valve is torn from the tube. This maybe the wrong way because I never research anything and just get on and do it.

sylvaman

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Re: Fitting Tyres n Tubes
« Reply #2 on: 15 February 2021, 08:07:31 am »
Thanks Jim, That makes good sense

RhysN

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Re: Fitting Tyres n Tubes
« Reply #3 on: 20 March 2021, 12:53:25 pm »
I have just had some tyres fitted for the Morgan, so I asked about this.
The very experienced motorcycle tyre man said that one nut inside the rim, the other should NOT clamp the valve stem to the rim, but that best is to use it almost like a locknut against the valve cap. Primary use is to sto the valve disappearing inside before you have air in the tube.
If you leave the nut against the cap, as he suggested then if the valve stem is at an angle in the rim, then there's an issue to investigate, low pressure or?????

ChrisS

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Re: Fitting Tyres n Tubes
« Reply #4 on: 20 March 2021, 05:50:01 pm »
I found the following response to this question from Michelin on a Classic bike forum and I must say it came as a surprise to me, if it is to be believed, I can't count the years I've been doing it wrong!


Thanks for choosing Michelin inner tubes for your bike.
 
The inner tube is installed  with the conical washer sitting between the inner tube and wheel rim.  On a road bike the first lock nut should then be run down to lightly touch the rim, and then backed off by half a turn.   The second lock nut is run down until it meets the first one, then the two nuts should be locked together by using spanners to rotate them in opposite directions.
 
I hope that this helps,
 
Best regards,
 
Tony Charlton
2w Customer Engineering Support – Operational Marketing[/i]

RhysN

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Re: Fitting Tyres n Tubes
« Reply #5 on: 20 March 2021, 07:05:04 pm »
It seems very much that you choose who you feel like believing!