I've reviewed this before, as I'm on a 2016 model. Here's an additional bit of info. It says up to 2.4...it'll take a bigger tire than that. I'm running 2.6" Nobby Nics front and back (which, BTW, are 2.5", as is the 2.6" Rocket Ron) and there is plenty of extra room. I was at the SLC warehouse and measured their 2.8" Rekon on a 35 mm rim, and it came in at 2.6" which would also fit, I expect, with a reasonable amount of room. I just measured the frame width at the widest part of the 2.6 NN and it came out to 2.81". My lovely bride of 38 years is about to take delivery on a 2017, and it has even more room. You're not going to get a real 2.8 on there, but 2.6? No problem. I came off of a Pivot 5.7c and it took a little while before I was able to get the most out of the bike and the upsize in wheels to 27.5, but after about 2 months, I started getting some personal bests on timed climbs up in Park City. For those of you familiar, one on Sweeny's/John's (rocky, rooty) and one on Armstrong (smooth). I found that, once used to it, the bike was more nimble on uphill switchbacks even though it has a slightly longer wheelbase (maybe positioning, or something...and that's with a 160 Pike on the front end!). I felt the rocks and roots on the downhills a bit more than on the Pivot, but somehow the bike felt more "planted" and secure, less likely to be knocked off course and though not timed, my son seemed to believe I was faster as well. It's hard to go wrong with this bike!