Originally Posted by
summit
Hot take: tire preferences are like pizza toppings, but plus bikes were a dumb fad by the industry to sell new shit.
At a certain point, extra width is just counterproductive weight, inertia, and rolling resistance. Lack of traction is usually due to the tread design/compound vs conditions. In some tire designs, extra width makes them worse (I'm looking at you, DHF and clones).
15 years ago I rode 2.8 and 2.7 for 26" park riding. That was silly. I kept getting narrower and narrower until I was 2.5/2.35 even for the park on a 26.
Even in 27.5 I didn't ever see the advantage of 2.6 for the park unless it was a Maxis 2.6, which is really a 2.5 from anyone else, at Whistler, and then only on the front. 2.3-2.4 seems like it is more than enough for most riding unless I'm riding bottomless kitty litter, snotty mud, or deeper sand.
In 29, 2.5/2.4 Mary/Betty feels sooooo draggy except in the loosest/steepest park riding. 2.4/2.4 Mazza/Dissector for loose CO trail riding is great.
I'll leave the fat tires for fat bikes. Sure, I enjoy riding my 4.8 cake eaters around the snow and even the dirt when the real bike is out of commission.