A front suspension fork for cycles includes an inverted U-shaped reversed arch having downwardly extending legs that are integral with the upper ends of the outer sections of the telescopic fork, thereby to define a rigid unitary slider component fork. The invention relates to the seeds of celery cultivar ADS-17, to the plants of celery cultivar ADS-17 and to methods for producing a celery plant by crossing the cultivar ADS-17 with itself or another celery cultivar. The image mutual events and associated mutual events are compared to determine their occurrences, one relative to the other as a measure of relative timing.