Descriptions

RISK RA148 Bicycle Disc Brake Caliper Piston Seal Rings

The RISK RA148 Disc Brake Caliper Piston Seal Rings are replacement rubber sealing rings designed for bicycle hydraulic disc brake caliper piston maintenance. They help restore sealing performance inside compatible brake calipers and are suitable for selected mountain bike and road bike hydraulic disc brake systems.

Made from durable rubber, these seal rings are lightweight, flexible, and designed to fit specific caliper piston assemblies. Each pack includes 2 seal rings, making it suitable for brake caliper repair, servicing, and replacement use.

This product is intended for riders, mechanics, and bike workshops looking for a practical replacement part for compatible SLX, XT, XTR, and road hydraulic disc brake calipers.

Key Features

Caliper Piston Seal Replacement
Designed for hydraulic disc brake caliper piston sealing and repair.
Compatible with Selected MTB and Road Calipers
Suitable for various SLX, XT, XTR, and road bike hydraulic disc brake calipers.
Durable Rubber Material
Flexible rubber construction helps provide reliable sealing performance.
Precise Size for Proper Fitment
Approximate size: 26 mm outer diameter × 24 mm inner diameter × 2 mm height.
Lightweight Repair Part
Two seal rings weigh approximately 0.85 g, adding almost no weight.
2PCS Pack
Includes 2 piston seal rings for maintenance or replacement.
Ideal for Bike Workshops and Home Mechanics
Practical small replacement part for hydraulic brake servicing.

Specifications

Item	Details
Brand	RISK
Model	RA148
Product Name	Disc Brake Caliper Piston Seal Ring
Material	Rubber
Color	Black
Size	Approx. OD 26 mm × ID 24 mm × Height 2 mm
Package Quantity	2PCS / bag
Net Weight	Approx. 0.85 g
Gross Weight	Approx. 0.9 g
Package Weight	Approx. 9 g
Package Size	Approx. 8 × 9 × 0.2 cm
Application	Hydraulic disc brake caliper piston repair

Compatibility

The RISK RA148 piston seal rings are suitable for the following brake calipers:

MTB Calipers

SLX Series: M675 / M7000 / M7100
XT Series: M785 / M8000 / M8100
XTR Series: M9020 / M9000 / M9100

Road Bike Calipers

R7070
R8070
R9170
RS785
RS805

Please check your brake caliper model and seal size before purchase.

Package Includes

2 × RISK RA148 Disc Brake Caliper Piston Seal Rings

Note: This product includes seal rings only. Brake caliper, piston, and other parts shown in images are not included.

Installation Note

Professional installation is recommended.
Before installation, make sure the brake caliper is clean and properly serviced. Always check for correct fitment and sealing performance after replacement.

For hydraulic brake systems, proper brake fluid handling and bleeding may be required after caliper service.