sure, 1.5" tire equals 38mm, rhynolite rim is 27.5mm wide, that's more than a 19mm wide rim with 25mm tire. I've got a rhynolite on the rear and a 24mm dyad on the front of my LHT using 1.75" tires. A 1.5" tire won't look as cramped as a 24mm rim with 28mm tire.