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The Problem Solvers GXP Spindle Adapter Kit lets you adapt a GXP crankset to a BB30 or Press-Fit 30 bottom bracket. It's used with the Problem Solvers BB30/Press-Fit 30 Adapter Kit, which is sold separately.

The Problem Solvers Sheldon Fender Nuts are an awesome way to avoid the brake-centering problems caused by mounting fenders directly to your brakes. They're named after the inventor and bike guru, Sheldon Brown. These special Sheldon nuts take the place of your existing brake nuts. They have threaded extensions for standard 6mm bolts (sold separately) providing a secure mounting place for your fenders that won't mess with your brake adjustment. They make it easier/faster to install and remove fenders, too, so they're great for commuting bicycles.

I-SpecBar Clamps are a one-piece hinged clamp adapter that allows users to mount I-Spec compatible shifters or dropper levers onto the handlebar, without requiring an I-Spec brake lever. - Sold individually, the clamp can be mounted to the right or left side - Hinged clamp for easy installation without removing other components - Black Anodized, CNC AL-6061 Aluminum - Compatible only with Shimano I-Spec II compatible shifters or dropper post remotes - 23g