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

Thanks Jim, That makes good sense

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]