hardened and tempered

The recommended amount for 1 mountain bike tyre:

The Forward Mount is a hinged handlebar mount featuring a stiff and durable composite matrix construction with secure X-Lock and an integrated rubber shim

If you have a roadie you won't need to use the road bike adaptor if you have this stand

35mm shaft

Race Face Atlas 35 Alloy Bars - Blue - 35 - 20 Rise - 820 PDP|PLP|Brake Rotor Type hardened and temperedThe Atlas 35mm has an even wider rise range to perfectly tune your fit, from ultra low 10mm rise to Superhigh 35mm rise Race Face's lowest and highest rises yet. The much loved 20mm rise remains unchanged and full 800mm width (Can be trimmed to 750mm) for hyperspeed control. Features: Manufactured from cold drawn, 7075 Aluminium optimized triple butted design 35mm bar diameter dramatically reduces weight while retaining the stiffness Built for AM DH