I don't know. It fit on my 2009 GS. Measurements are
12 1/2 length and 8 1/4 width. Long straps thread through two brackets in front of the tank panel and back to the bag to secure. The small disc in back goes between the tank panel and the seat to secure.
"Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight" - Benjamin Franklin
When I bought a brand new one of them for my RT, I was told they ONLY fitted the RS/RSS/ST models Nuke, so you should be all right, even if you hafta fiddle with/sort out some straps or fixings!
The brand new tank bag came with 2 metal brackets for the straps/front/steering shaft end, one to fit onto the RS/RSS, & one for the ST - I tossed both those metal brackets, cut off the little metal clip/disc thingy that's meant to slide/hook into/under the panels at the seat end, & used a couple of extra straps & some velcro to make it fit neatly onto my RT.... Great seat for my 2.5kg Supervisor, Max the mini Maltese!