Well I've been running a 2.65 Kujo on my rhyno lite for about 8 months now without any probs, your maxxis should be fine. Actually, I'm even running a 1.5 XC tube in it and still haven't flatted yet. I'd change it buts it too much effort to get the damn thing off. Come to think of it, that's probably the only prob you'd have with high rollers, they might be a pain to get on the rim, sun rims are notorious for this.