The largest cog is 7075 Aluminium to keep weight down while the remaining cogs are constructed from durable steel

F 160-180mm - R 140-160mm 160-180mm:

Torx Head Key for accessing Bleed Ports

Evoc utilises a couple of systems on this pack to maximise your comfort:

If you're looking to avoid those nasty elbow injuries

Park AWS-8 3 Way Ball Ended 4 5 6mm Allen Key Tool PLP|EMTB Optimised The largest cog is 7075Park first introduced the 3 way allen key to the world over 30 years ago, and it's been a favourite of bike mechanics and home mechanics alike ever since. The Park AWS 8 has ball ends for accessing harder to get bolts, and a big, palm sized handle for comfort and leverage. You pretty much just need the one tool for at least 3 4 of the bolts on a bike! Who's this for: People who work on bikes, and don't want the hassle of needing to switch tools, just