Replacement stretchy o-rings for handlebar mounted gadgets

[grams]

I'm after some replacement o-rings for my Quadlock phone mount, as I keep breaking them. They're just simple circular o-rings but the branded replacements are stupid money for what they are.

I figure I can get a drawer full of generic ones for the same price if I figure out the right search terms - what material should I be searching for to get something suitably stretchy?

[Pickled Onion]

I bought nitrile rubber ones and they are fine - I had no idea there were different materials. After a google I suppose viton ones *might* last longer, but the ones I got have lasted longer than the original quadlock rings.

[andrew_s]

I gather that the Quadlock o-rings are EPDM.

EPDM is more resistant to UV and general weathering than Nitrile (though less resistant to petroleum products).

[robgul]

If you don't need to keep taking the mount on and off then long thin cable ties are a more stable and durable alternative to the o-rings.  A little bit fiddly to fit but once installed they're there for the duration.

Rob

[The Family Cyclist]

I use standard o rings that you can get from any engineering company. They may perish but as got a large box for around a fiver years ago and occasionally actually use them for their proper use as well I don't mind replacing them

[orienteer]

I get o-rings from www.bearingboys.co.uk