Product Description Specifications:Application:Gravel, RoadCompatibility:Campagnolo 1x13-speedChainring Mount:123 mm bolt circle diameter, 4-armTechnical Information:Series:Ekar GTCrank Arm Material:aluminiumChainring Material:aluminiumAxle Material:steelGradation:36 tooth, 38 tooth, 40 tooth, 42 tooth, 44 toothCrank Arm Length:170.0 mm, 172.5 mm, 175.0 mmChainline:43.5 mmQ-Factor:145.5 mmAxle Diameter:25 mmRecommended Bottom Bracket:Pro-Tech threaded bearing cups or Pro-Tech Pressfit bearing cupsRecommended Chain:Campagnolo Ekar GTFeatures:lightweight, robust crank for Campagnolo 13-speed drivetrainsone chainring only: highly reliable and user-friendlyeasy chainring replacement without removing the crank (4-bolt assembly)perfect set-up even with wider chainstaysUltra-Torque axlespecially sealed ball bearings36 t and 38 t recommended for Adventure, 40 t for Gravel with elevation gains, 42 t for flat Gravel routes, 44 t for Endurance Road and Endurance GravelTechnology:Ultra Torque™ Low weight, rigidity and easy maintenance: Ultra Torque. Campagnolo has made sure that the two halves of the bottom bracket are inseparably connected to the respective crank arms. This new development has made it possible to considerably reduce the lateral protrusion from the frame, thus preventing the undesirable contact of the ankles with the crank arms during pedalling. Its assembly is extremely simple; a single oversized bolt is used to firmly connect the two halves of the axle. Concerning effectiveness of transmission of momentum, this system can stand comparison with a one-piece axle. In addition, despite the narrow side profile, it has been possible to position the bearings outside the bottom bracket shell, making the axle, which has been given a larger diameter, more rigid thanks to the increased support width. The extraordinary performance characteristics of the Ultra Torque have been achieved by a system that originated in engine construction in the area of couplings and rotary axes: the Hirth joint. This is a coupling connection with self-centring and self-aligning spur gearing, which is arranged in the centre of the inner bearing axle where the ends of the axle halves firmly connected to the crank arms touch each other.Manufacturer Numbers:170.0 mm 36 tooth:FC25-EKGT1306170.0 mm 38 tooth:FC25-EKGT1308170.0 mm 40 tooth:FC25-EKGT1300170.0 mm 42 tooth:FC25-EKGT1302170.0 mm 44 tooth:FC25-EKGT1304172.5 mm 36 tooth:FC25-EKGT1326172.5 mm 38 tooth:FC25-EKGT1328172.5 mm 40 tooth:FC25-EKGT1320172.5 mm 42 tooth:FC25-EKGT1322172.5 mm 44 tooth:FC25-EKGT1324175.0 mm 36 tooth:FC25-EKGT1356175.0 mm 38 tooth:FC25-EKGT1358175.0 mm 40 tooth:FC25-EKGT1350175.0 mm 42 tooth:FC25-EKGT1352175.0 mm 44 tooth:FC25-EKGT1354Contents:1 x Campagnolo Ekar GT crankset1 x right bearing (installed)1 x left bearing (installed)Weight:black | 172.5 mm 38 tooth: 850 gManufacturer: Campagnolo S.r.l Via della Chimica 4 36100 Vicenza Italy info@campagnolo.com