QUOTE(~tera~ @ Oct 3 2011, 09:42 AM)
sry .. i tot the earcap in pic same size with gs1k circumaural ...
No worries, might just be me seeing the pics wrongly. If you want circumaural, the G-Cush pads which yes, you're right, same sized as the GS1K ones, are the correct pads to go for.

QUOTE(~tera~ @ Oct 3 2011, 09:42 AM)
so if i mode my sr80i to circumaural with sigle sided cable would cost ..me another grado sr80i ??
what if i just mod it to these bowl cap with single sided cable .. how much could it be ?? are these bowl cap much comfortable than original sr80i overear earcap
What I meant was the total cost for modifying your SR80i into single entry cable + G-Cush pads
MAY cost you nearly the same price as how much you've paid for your SR80i in the first place. MAY.

Well, it's just an estimate which you may prepare first to be safe, since I can't say for sure the prices our local modders will charge.
That's why I've mentioned why not just look for another pair of headphones which you may find to be more comfortable.