Schwalbe makes a Super Moto X tire in a 27.5" X 2.4" size.
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WIDE, COMFORTABLE, SAFE! Whether travelling on asphalt or trail, the beefy Super Moto-X offers the best riding characteristics and plenty of comfort. The extra-resilient DoubleDefense construction lets you reach your destination safely, even in the tough…
www.schwalbe.com
I think you'll be fine with that size.
That's only 1¼ mm bigger than your 27.5 x2.35 tires.
Take a look at the space between your fender and tire.
I'm sure that you've got a couple mm to spare.
I only miss side knobs when I do dumb shyte, like I did today.
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My tires work great on pavement and trails, but they aren't made for ruts or muck.
My tires have almost 3000 km on them and the rear tire barely shows any wear.
The front tire looks almost new.