Brake Caliper rebuild O-rings

[Mihai Surubariu]

I am looking for some brake piston orings 38mmx3mmX3mm and 41mmX3mmx3mm. Basically inner diameters of 41 and 38 mm the cross section is square an 3mm wide.
Anybody has any ideea where I can source those?

Thanks

[Steve Towers]

Try Conquest Seal. They are local (Orange County). Through them you can get any size o-ring in any compound. Possibly also McMaster-Carr http://www.mcmaster.com" onclick="window.open(this.href);return false;

BTW - o-rings have only two size characteristics. ID and cross section. They are assumed to be a round cross section unless you are using quad rings which are sort of an X shape. You'll probably have to tell whoever you purchase from what compound and what hardness you want, in addition to size. My best guess is EPDM (Ethylene Propylene ) about 70 shore, but I really have no idea what temperature the rings will see in service. I think EPDM is good to about +400F. Viton (FKM) should also be ok.

[Daniel Y.]

Don't you have Stop Techs Mihai? You should be able to get rebuild parts directly from the manufacturer.

[Mihai Surubariu]

No I have some TWR monoblock, they don't make them any more. I tried Mcmaster, they only have Buna compound in the size I need, I will try the other sugestions.

Thank you