





Titanium Alloy Caliper Piston (includes 2 pistons + 2 seals)
The RISK RT128 Brake Caliper Piston Repair Kit is designed for servicing and replacing worn or damaged pistons and seals in compatible Shimano hydraulic disc brake calipers. Made with a corrosion-resistant titanium alloy outer shell and a polymer heat-insulating inner insert, this kit helps restore braking performance while improving heat resistance and durability.
The piston features a lightweight thin-wall design and a ventilated groove structure on the inner surface to assist heat dissipation during braking. It is suitable for selected Shimano MTB and road hydraulic disc brake calipers.
Compatible with the following Shimano hydraulic disc brake calipers:
Note: Please check your brake caliper model before purchase.
Includes:
Includes:
Note: Brake calipers shown in images are for display only and are not included.
| Item | Details |
|---|---|
| Brand | RISK |
| Model / Item No. | RT128 |
| Product Name | Titanium Disc Brake Caliper Piston |
| Material | Titanium alloy outer shell + polymer inner insert |
| Piston Size | 22 × 22 × 9 mm |
| Seal Ring Size | Approx. 26 mm outer diameter × 24 mm inner diameter × 2 mm height |
| Net Weight | Approx. 14 g |
| Package Weight | Approx. 18 g |
| Package Size | Approx. 15 × 9 × 1 cm |
| Gender | Unisex |
| Application | Bicycle hydraulic disc brake caliper repair |

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