Zetor 1 er-CRYSTAL (UR 2)

The numbering is not arbitrary. Across the Crystal range the second-to-last digit marks the drivetrain: an 8111 is rear-wheel drive, an 8145 the same tractor with four-wheel drive. Anyone searching for one usually means both — technically only the front axle separates them. The same scheme runs through the whole series, from the 9111/9145 to the 12111/12145.

The Crystal range was not built in Brno but at the Slovak plant in Martin, where the heavier Zetor models ran from 1981. In 1984 the series was reworked into what became the 1st series: a new bonnet with a bevelled front, a revised cab with five work lamps, a larger clutch (350 mm on the four-cylinder models, 380 mm on the six-cylinder ones) and a reworked injection pump that lightened the clutch pedal. Four-wheel drive works through a hydraulically actuated multi-plate clutch.

In 1987 the 2nd series followed with a synchronised gearbox. Anyone buying a Crystal today should therefore check the year: the unsynchronised 1st series asks for more feel when shifting. As standard the 8111 has sixteen forward and eight reverse gears; creeper gears were available at extra cost.

Durability remains an open question. Even in its day the 8145 was considered less robust than the older 8011 models it grew out of — a verdict that persists in owner forums to this day. Hard figures do not exist, but parts supply does: several suppliers still serve the Crystal range with new components.