The invention relates to a reel-up for reeling of a fiber web (W) around a reel spool (15B) to form a parent roll (20B; 20A) by means of a reeling nip (N) between a reeling cylinder (10) of the reel-up and the parent roll (20B) under reeling, which reel-up has a primary reeling position and a secondary reeling position, which reel-up (10) comprises the reeling cylinder (10), substantially horizontal guides (14) and for each end of the reel spool (15A; 15B) loading arms (12,13; 16,17) and carriages (18) and the primary reeling position is fixed.