Fitting of Innertubes

[dave55]

Having bought 2 new Michelin Airstop tubes i was going to fit them and tyres to my wheels . Now i have always been told since a youth to put one of the nuts or knurled retaining bits on the inside of the rim and other on outside ? Even by a tyre fitter at a large bike shop, Hmmm i just happened to notice that on the box in top left corner it shows a small diagram of a section of a rim and it shows the tubes valve through the rim and Both nuts on the outside of the rim .
Have i got away with fitting it wrong all these years ?       Cheers dave

[muskrat]

G'day Dave.
I always put the nuts to the outside. Never had one on the inside even from the shop.
Cheers

[Triton Thrasher]

Yes there should be no nuts inside.

[Rex]

This seems to be the current accepted wisdom, which then begs the question, why fit two nuts to the valve stem? What possible use is the second nut?
Personally I've always run one nut down to the inner tube to help secure the stem in the tube, and the other on the outside of the rim although I accept that Michelin and co say this is wrong now.

[RDfella]

Maybe the confusion arises because tube manufacture has changed over time. I too seem to recall 50 plus years ago tubes needed a nut 'inside' to help secure the valve to the tube casing.

[sean]

just replaced front and rear on my super rocket no nuts on the inside and only tire rim lock on the rear wheel might as well do the wheel brgs while your in there 6205 2 RS

[Colsbeeza]

I have never put a nut on the inside. I don't lock up the outer nut either, leaving it a few threads up the stem. On a couple of occasions under heavy front braking and with low tyre pressure (particularly BSA's recommended 19psi), the front tyre has slipped on the rim, observable by the valve tube leaning backwards. The outer nut is there to stop the whole shebang getting sucked into the tyre. Just had to let the air out, give the tyre a reef until tube straight again and check pressures more often. With both nuts tight, you would never know if the tyre slipped on the rim until the tube gets torn and tyre goes flat somewhere out in the boondocks. I'd like to think there is some reasoning there, but there never was!. Whacky I know , but it has never bothered me.
Col

[BSA_54A10]

No nuts for this little black duck either .
Nut goes on when fitting the tube to prevent it slipping back into the tyre.
Once the tyre is on the rim nut comes off for the same reason Col said
And remember that modern tyres need to be inflated harder than period tyres
Put 24 PSI in a modern tyre and you are just begging for the tyr to walk around the rim & rip the valve out  of the tube .

[muskrat]

G'day Fellas.
Split the topic to stay on topic.
Cheers