[poopresearch]

It's been my experience that the urethane orings do last the longest. I'm actually running a mix of urethane and HBNR right now. I have urethane for the orings responsible for cycling (rear can, bolt sail and inside of back latch) and HBNR for the other dynamic orings (front and middle can and bolt guide).

[carolinaragetc]

I've used HNBR before, and they work. But contact an oring manufacturer, and they'll tell you HNBR is wrong for the application. HNBR are still better that regular Buna, but for dynamic seals, Viton and Urethane are better. Urethane and Viton both have less friction once broken in

[jswing]

Originally Posted by poopresearch

DC19 techs my Luxe and he discourages their usage. I gotta say, everything DC19 has told me about the Luxe is true. I've learned to listen to him!

This

[KKoTerski]

I'm about to buy some urethane 13, 16, and 17s and wanted to make sure that these are indeed the right type and size.

http://www.theoringstore.com/index.p...th=367_454_453

[kellan]

Originally Posted by KKoTerski

I'm about to buy some urethane 13, 16, and 17s and wanted to make sure that these are indeed the right type and size.

http://www.theoringstore.com/index.p...th=367_454_453

Yep!