Maxxis' Mammoth EXO was the brand's first foray into the world of fat bike tires, and like the ancient beast it's named for, it's prepared to roam over any amount of mud, snow, or sand you put in front of it without a second thought. Unlike its namesake, though, we think this tire is around for the long haul. Made with fast-rolling dual compound rubber, the Mammoth won't get slowed down on hardpack with its low-profile center tread, and whether you're turning in loose sand or on groomed snow trails, the tall side knobs make for consistent, reliable cornering. Maxxis reinforces the 120 TPI Mammoth with its EXO protection, and at 1270g, it won't be the lightest tire in your garage, but it's what you'll want to be on when the going gets tough.
Wanted something that rolls a little faster than Nates for summer hardpacked trails on my Pugsley. The lower-profile tread and tightly-spaced center knobs made me think this might fit the bill. It hasn't disappointed. These are the fastest-rolling fat bike tires I've ridden and still provide plenty of grip at 8-9 psi. I've had great luck in rocky terrain with other Maxxis EXO-sidewall tires and I like that feature in this tire, especially given the profile on 80mm rims. As you might expect, these are not mud-worthy tires. However, at 3-4 psi, they grip better than expected on firm packed snow. These will likely be my summer/fall go-to tires.