My son has a red Optima in his GTV6 - in the garage next to my Cobra -- it measures 7 inches in height plus the posts, it is 7 inches wide, plus the side posts, and 10 inches long. It is fastened with a cross bar, and there are battery charger wires attached, so it was hard to get an absolute accurate read. As far as I can tell, a bigger issue than size will be whether it will sit securely in the ERA -- at least with my attachment. The Optima sits on tray. Best, go and look at it.
