Brompton Ti Parts Workshop Titanium Crank Bolt Set - Black Bolt / Black Washer

This Ti Parts Workshop titanium crank bolt set is designed as a direct replacement for your Brompton folding bike's standard crankset hardware. It's a straightforward upgrade that cuts weight where it counts without changing how the bike rides or handles day to day. The set includes two bolts and two covers, finished in black to match most Brompton builds.

The bolts are machined from Ti-6AL-4V titanium via CNC production, which gives them the strength to handle the load of pedalling while keeping mass to a minimum. The covers work together to keep water and dust out of the crank joint, so the mechanism stays clean and smooth through winter commutes and wet weather riding. Over the original Brompton component, which weighs 30.4g, this titanium set comes in at 20.1g—a saving of 10.3g. It's the kind of weight saving that doesn't transform how a Brompton feels, but it adds up across a build if you're working through a few lightweight upgrades.

Installation is straightforward if you've done basic bike maintenance before, though it's worth being careful with the bolt torque to avoid stripping the threads. The set fits Brompton cranksets across the A Line, C Line, P Line, and G Line models, as well as older Brompton designs, so compatibility isn't an issue for most owners.

This is the kind of component for riders who've already settled into Brompton ownership and want to refine their setup incrementally. It won't dramatically change your commute, but if you're chasing every gram and prefer titanium's durability over time, it's a reliable choice that keeps your folding bike running cleanly.