inner tube question

potters1863

Hi,

Have replaced a tyre and inner tube this week following a puncture. Changed before and have had specialized and there has been a thread on the stem of the inner tube to fit the nut to the inside of the wheel rim.

Fitted a set of vittoria tyre and inner tube and the inner tube does not have a thread but is smooth, therefore does not come with the nut ?

Is this correct? can you ride with this setup? I assume you can as they wouldn't be made the way they are or are for a different wheel?

Thanks

sub55

potters1863 wrote:

Hi,

Have replaced a tyre and inner tube this week following a puncture. Changed before and have had specialized and there has been a thread on the stem of the inner tube to fit the nut to the inside of the wheel rim.

Fitted a set of vittoria tyre and inner tube and the inner tube does not have a thread but is smooth, therefore does not come with the nut ?

Is this correct? can you ride with this setup? I assume you can as they wouldn't be made the way they are or are for a different wheel?

Thanks

inside :?:

potters1863

I'm calling the wheel by the spokes the inside, I know it reads a bit funny but basically is this nut required to hold the inner tube stem in place or is it fine for the air pressure to do the job?

Nairnster

^^That was my thought

The lock ring/nut is meant to be fitted outside, not within the tyre.

And, I would imagine, that as some inner tubes are made without the thread, they must be fine. Just make sure the tube is seated and located properly, with the valve coming straight out of the valve hole and not at any angle.

Nairnster

ignore my first comment, as you posted whilst i was still writing mine.

thel33ter

Te little nut is meant to be on the outside of the rim, where the spokes are, not inside it.

And to answer your question, yes, some tubes are not threaded, it makes no difference to how they work.

balthazar

The retaining nut is useful for holding the valve in place while pressing on a pump head, but otherwise has no purpose. It can't be done up too tightly as often thought, but equally it has little function. Many tubes have dispensed with it, the only cost being a slight difficulty in attaching the pump at certain pressures.

sungod

^^^this

fwiw i don't bother putting the nut on, if the valve stem is a bit short then pushing on the tyre gets enough of it sticking out to get the pump on and start inflating

merak

Rule #60

EarlyGo

^^ Wot he said!

http://www.velominati.com/blog/the-rules/

Rule 60 refers.

potters1863

Thanks for all the replies, I am now satisfied that my inner tube fitted without the retaining washer nut is fine.

As for fitting the pump, with it being the 51mm stem I assume this makes it easier to hold the stem to fit the pump?

This is such a good site for gaining the useful bits of information as there is so much to learn as you come across these problems. Thanks

sungod

long stems are mainly for use with deep rims, but there's no harm having the stem longer, it's an awful lot better than having it too short

for simplicity i use long stems on both shallow and deep rims, saves having two lots of tubes, or faffing around with extenders, or embarrassing mistakes out on the road when you find you have the wrong tube with you

the late sheldon brown's site has a lot of useful info, it's not updated anymore, but it's still good...

http://sheldonbrown.com/articles.html

the park tool site is also good for info on how to do various maintenance tasks...

http://www.parktool.com/blog/repair-help

...just don't believe that you really need all those tools!