You will use the stock bolts to mount this chainring

What size bikes (wheel base) can it carry: Hanging racks like the Apex XT are not limited by wheel size or width

functional

T30 Torx keys and a combo cross/straight tip screwdriver

Helmet carry: This pack doesn't have a dedicated system for helmet carry but it does have external attachment straps so you could rig something up for this if you wished

Crank Brothers Mallet Lace Clip-In Shoes - US 5 - Black - Red eBay You will use the stockThe Crankbrothers Mallet clip in shoes are for gravity focused riding on the race track and at the bike park. The Mallet is optimised for use with Crankbrothers Mallet pedals and features the innovative Match System for hassle free engagement with any MTB clip in system, whether thats Crankbrothers or SPD. The shoes come with a Match shim and Crankbrothers cleat pre installed in a neutral position so they are ready to ride with Crankbrothers pedals