I don’t have experience with a Troll in particular, but do with a Pugsley. The horizontal dropouts would actually be better with a Rolloff/SS setup. They’re kind of a pain in the ass with a derailer. The wheel doesn’t slide right out like it does with a vertical or even 80’s style angled dropout. You have to slide the wheel backwards, fighting the derailer chain tension, and then getting the chain off of the cassette cogs can be a hassle. That or you fight the derailer tension pulling the chain backwards off of the cogs before sliding the wheel out, which gets your hands really greasy. And there’s no fender on the Pugsley. Personally, I would choose another bike. I’d think the combination of fenders and derailer would be a hassle every time you had to remove the wheel, to the point that you’d be kinda frustrated by the situation before you even started the process. But again, I haven’t done it with fenders and derailer. And I’ve only dealt with it a hand full of times because it’s a friend’s bike. Maybe I’m wrong and maybe there’s an easy trick that I didn’t figure out in the handful of times I did it. Someone with experience may be able to say otherwise. I know wouldn’t want to deal with it after riding 40mi on a warm day, or in the rain, that’s for sure.