Selle Italia: Making Its Début In The 2015 Tour De France, The Kronos Tekno Flow Has Been Designed To Achieve The Best Possible Balance Between Comfort & Performance. Equipped With Advanced Non-Slip Technology To Offer The Rider A Consistent Pedalling Position. Small: Weight: 218 GRail: Carbokeramic ø7X9 Mm Dimensions: 135X265 Mm Category: High Performance Large: Weight: 220 GRail: Carbokeramic ø7X9 Mm Dimensions: 145X265 Mm Category: High Performance