An O ring chain has a sealing rubber ring which is O in cross section .
An X ring chain has a sealing rubber ring which is X in cross section .
Lubing is the same [and open to personal choice and public debate ].
X ring is probably better ,depending on the application .
DID is a good brand .
That's about it really .
techno blurb X-Ring
Blessed are the cracked, for they let in the light. - Spike Milligan
"When you come to a fork in the road ,take it ! When you come to a spoon in the road ,take that also ."
Last edited by Dodger; 7 Oct 2007 at 21:24.