700x23 Schwalbe One folders on the road bike's Araya CTL-370 622x14 rims. Usually 90 psi front/100 psi rear for rural chipseal, 100/110 for smooth pavement. That's a bit wider than the 700x18 tires originally on the bike. I'll probably try 700x25 tires next go 'round to ease the ride on chipseal. I doubt the bike would clear 700x28.

700x42 Conti Speed Rides (nominal, actually closer to 700x38) on the Univega Via Carisma's Araya PX-45 622x19 rims. The frame would clear larger tires but the front derailleur won't -- the cable clamp bolt protrudes too far. Usually around 50 psi front/60 rear, a bit lower on chipseal and gravel. Sweet tires for all around riding. I'll keep riding 'em as long as they're available.