fyi i've found that the maxxis ignitor 2.35 LUST fits pretty well. more than most tires out there, this tire has a low sidewall relative to the tread footprint, and thus it works well on low-clearance frames like this one. plus it's an excellent tire for western US type of trails.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: tire fit in 660 ebb frame