Tire - Kenda wire bead tire
A basic tire for both the fire trail and around town. Lots like the Schwalbe Big Ben.
26 x 2.1" (559 x 54) - Kranium, wire bead, DTC rubber compound good for wet or dry and will last a long time, too. No relective strip or special kevlar puncture protection, too bad, but tread is so thick that it should last a couple years of daily commuting at least. Measure a bit under 2.25".
650b x 45 (584/27.5 x 1.75) - Same same tread and rubber compound as the Kranium but Kenda calls these "Kwick seven-5" instead. These have a reflective strip and K-shield puncture protection and they're actually closer to 2" than 1.75".