large Rubber O rings

[francovendee]

I have a Sigma computer that is held on by what looks like a large rubber 'O' ring. I can find small ones but need something long enough to go around a suspension fork.
I did a search for O rings and found something aimed at a certain part of the male anatomy Not at all what I need!

Any suggestions where I can get the large O rings from?

[PDQ Mobile]

Camping and caravanning centers often keep boxes of assorted sizes.

[[XAP]Bob]

Plumbing fittings?

[Brucey]

if you google 'cat-eye spare fixing bands' you will find the very similar parts for securing many models of cat-eye light etc. eg.

https://www.tredz.co.uk/cateye-brackets-and-spares

These parts are (unlike many O rings) allegedly made of weather-resistant rubber. However I think there may be better quality parts out there.

You can buy O ring seals from specialist vendors, plumbing merchants and on e-bay. FWIW you can buy (say) a cheap push-fit waste fitting which will contain two O rings of about 40mm diameter for about a quid.

cheers

[Redvee]

Plumbing fittings?

That was the suggestion when I went looking for spares for mine, I walked past the heating shop opposite my flat, where I ended up buying them to get to the bike shop to be told to go back where I'd came from.

[hujev]

Warning: useless wisecrack reply.

This is what I immediately thought of from the subject:

Dr. Feynman dug into the task. The pivotal moment in the investigation came on February 11, 1986, when, on national television, Dr. Feynman held up sample material of the “O-ring” rubber gasket from one of the shuttle’s solid-fuel booster rockets and dropped it into his glass of ice water. The demonstration illuminated Dr. Feynman’s theory that the gasket lost resiliency at freezing temperatures – thus allowing gases to escape and the shuttle to explode.

[gxaustin]

Google O ring seals - you'll avoid c**k rings that way. They are usually nitrile rubber so shouldn't perish quickly.

[landsurfer]

Just go to your local hose and hydraulics company .. There are hundreds of them in the UK ... They will sell them for pennies

[landsurfer]

Google O ring seals - you'll avoid c**k rings that way. They are usually nitrile rubber so shouldn't perish quickly.

Viton last a lot longer .. And cost no more ..
First 10 pm's get a pack of 10 foc .... Just let me know the name of the mount ... Garmin etc...

[gxaustin]

Viton last a lot longer .. And cost no more ..

Even better

[Brucey]

'Viton' covers a range of different fluoroelastomer compounds, which vary in their performance considerably. There is a guide here

http://rainierrubber.com/wp-content/uploads/2014/01/Viton-Selection-Guide.pdf

one of the aspects in which the compounds vary is in 'compression set resistance' which relates to the way the O ring is permanently deformed out of shape when installed. This may also relate to its elasticity when used as a tension rubber. However most viton grades are also more UV resistant than other rubbers, so overall even the least good viton grade may be a better choice for this use.

cheers

[AMMoffat]

I joined 2 smaller rubber o rings together to fit a Sigma transmitter to my suspension forks.