BOA closure system

It is a little thicker than a standard windproof jacket but still minimal-ish

TECHNOLOGY HIGHLIGHT(S) Semi-spidered steel cogs

With its Xmatter foam spine protector

Sram and Campy compatible

PRO Tharsis 3Five Stem - Black - 35mm - 60mm x 9 Degree - 1 1-8th Inch PLP|Model Year BOA closure systemThe 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.