Titanium Piston for Shimano Hydraulic Disc Brakes | 105 R7170/Ultegra R8170/Dura-Ace R9270 | 21mm Diameter

Hydraulic Disc Brake Titanium Piston | Brake fluid, sweat & corrosion resistant

Shimano 21mm Diameter Piston | Sold per Caliper (1 set). Front & Rear Caliper need 2 sets.

Perfect upgrade for worn-out stock ceramic pistons.

This titanium replacement piston is resistant to brake fluid and corrosion. A small part with a disproportionate impact on brake reliability.

Compatibility

105 R7170
Ultegra R8170
Dura-Ace R9270

Features

PVD Hardened Surface

Physical Vapour Deposition (PVD) coating adds a hardened outer layer that resists scratching and surface wear.

Unlike conventional electroplating, PVD bonds at a molecular level. The finish won't flake, peel, or degrade in contact with brake fluid over time.

Hot Forged Construction

The piston is hot-stamp forged rather than machined from bar stock.

Forging aligns the grain structure of the titanium, producing a stronger and more fatigue-resistant component, better suited to the repeated hydraulic pressure cycles of a brake piston than a machined equivalent.

~40% Lighter Than Stock

Titanium is significantly lighter than steel for the same strength.

Corrosion Resistant - Brake Fluid, Sweat & Rain

Titanium is highly resistant to corrosion from mineral oil, salt, and sweat — all of which the piston is exposed to in normal Road use.

The PVD finish adds a further protective layer over the base titanium, keeping the piston functioning like new over the life of the brake.

Polished Mirror Finish

Precision polished to a mirror finish.

What's Included?

In one set (Suitable for 1 caliper): 

• 2x Titanium Pistons
• 2x O-Ring

For front and rear calipers, please buy 2 sets.

Installation

Installation involves opening the brake hydraulic system. If you are unfamiliar with hydraulic brake servicing, please seek assistance from a local bike shop.

Incorrect installation may affect brake performance and safety.