Just installed these Auto-plaza M4 titanium bolts on my mountain bike's disc brakes, and wow, what a difference!

First off, the weight savings is noticeable when you're holding them - these things are crazy light compared to the stock steel bolts. Every gram counts when you're pushing hard on the trails.

The threading is buttery smooth - they screwed in perfectly without any cross-threading issues. The precision machining is evident when you handle them.

After a few wet rides, I can confirm the corrosion resistance is legit. No signs of rust or wear yet, which is more than I can say for my old bolts.

They fit my Shimano hydraulic calipers like they were made for them (which they basically were). No wobble or play in the brake pads now.

Only downside? Now I want to replace all my bike's fasteners with titanium!