Two 28 x 2.1" Schwalbe "Little Albert" MTB tires for Sale. The ISO size is 54-622. Used, but in good condition. Asking $70 each, or $120 for the matching pair. Below is information from the manufacture...
The Little Albert is ideal for providing outstanding performance on shale tracks for both fearless soft and hardtail riders. Uses the light Snakeskin sidewall layer that is flexible and extremely resistant to scrubbing. Superb grip thanks to the off-road racing compound.
* Brand: Schwalbe
* Model: Little Albert
* Imperial size: 28" x 2.1"
* ISO size: 54 - 622
* Sidewalls: Reinforced SnakeSkin
* Profile: Narrow ~ fast rolling
* Designed to work front or rear
* Bead type: Folding
* Intended Use: Mountain
* Min Pressure: 35 psi (2.5 bar)
* Max Pressure: 65 psi (4.5 bar)
* Weight: 590 grams