Closure System: The BOA Fit System utilises a micro-adjustment dial

It can also be used to increase the range of standard doubles

Thanks to the angular design

maximizes power transfer and efficiency

PRO Tharsis 3Five Stem - 1 1/8th Inch Steerer - 35mm - 45mm - 0 Degree - Black PDP|Colour Closure System: The BOA FitThe PRO Tharsis 3Five Stem is beautifully CNC machined from 7050 aluminium and has a 35mm clamp diameter, making it suitable for use with many modern bars that are adopting this newer standard. Who's this item for: Riders looking to upgrade their cockpit to a 35mm clamp setup. Material: CNC machined from 7050 aluminium. Stack height: 4mm Clamp diameter: 35mm Rise: zero degree rise Weight: Approx 150 grams for the 35mm length stem.