Galaxy will take my medium (long low slack) solaris with front wheel off. It’s a bit tight on length with the bars turned lengthways. Dropper down helps a lot.
From what I’ve seen comparing to the smax that little bit for height and length at the back corner could very well make the difference as it’s where the handlebars/wheel sit.
So far the most we’ve had in (we’ve only had it since the summer, so not that ambitious) was three adult bikes behind the driver on the right hand side, 6 year olds bike across the back and riders down the left hand side.
At some point I’d like to make a slide in system as that would make it a *lot* easier to load. Worth noting I can chuck the bike in whole with all the seats down