Looking to increase to a 200mm rotor upfront and swap the current 180mm onto the rear of my t-130 but not entirely sure which adapter I need.

Also is it a simple case of swapping the existing 180mm front adapter onto the rear?

Sram guides on Rockshox pike if it makes a difference

Unfortunately u can’t switch adapters between front and back.

Yes you will take your 180 Post of the front and put it on the back (assuming your rear is currently ‘native’ at 160mm) and then add a 200 to the front. EDIT: BTW the longer bolt end goes up on the fork and at the front on the rear (so kind of the same way).

Pretty sure you can’t put a front adapter on the back. I’ve tried it and it didn’t work (the offset is all wrong ) Also, the ones u buy are always specifically marked “front” or “rear”.
I could be completely wrong though.
Unless you’ve got IS front (rather than post). Then, they might be interchangeable.

“I could be completely wrong though.“

You reckon ?

Given that the t-130 probably has rear post mount brakes, I’m gonna go with “I’m likely wrong” and say no more on the matter.