Titanium Rear Brake Caliper Mount Bolt Set. These are the bolts that mount the rear caliper to the bike. An area of the bike prone to corrosion, these offer excellent corrosion resistance and are an incredibly 40% lighter than steel originals! Please note that our coloured Titanium is not identical to our Aluminium range. DualDrive features: Head design that is compatible with both Socket and Allen Keys. Forged Bolts with rolled threads for superior strength. Grade 5 Titanium to maximise strength and durability with fantastic weight saving properties. Predrilled for lockwiring.