Disc Brake Components & Kits
OEM-grade service kits and individual components for all major air disc brake caliper platforms — engineered for transit buses, motor coaches, and heavy-duty commercial fleets
Complete Disc Brake Service Kit Coverage
Fraser Gauge supplies the full range of disc brake service components and repair kits for every major air disc brake caliper platform in North American transit and commercial fleet service. Whether you are performing a guide pin replacement on a Knorr SB7, rebuilding an EX225 adjuster mechanism, or replacing WABCO PAN rotors, Fraser Gauge provides the OEM-grade components and cross-reference documentation to complete the job correctly the first time. All components are sourced from Brakingtech — the industry's leading OEM-grade disc brake component supplier — and carry a 1-year warranty.
- • BTM20055M — Internal Calibration Mechanism
- • BTM20061 — Adjustment Mechanism Gear
- • BTM20157 — Caliper Repair Kit
- • BTM20173 — Slide Pin Kit
- • BTM20175 — Boot Kit
- • BTM20215 — Wear Indicator
- • BTK10002 — Tappet Kit 69mm (ADB22X/SN7/SK7)
- • BTK10006 — Tappet Kit 74mm (SB)
- • BTK10018 — Caliper Lever (ADB22X/SN6/SN7/SK7/ST7)
- • BTK10050 — Adjusting Mechanism (ADB22X/SB7/SN7/SK7)
- • BTK10064 — Caliper Chain 29 Links
- • BTK10096 — Guide Pin, Seal & Boot Kit (SB6/SB7)
- • BTK10106 — Guide Pin, Seal & Boot Kit (SB6/SB7/SN7)
- • BTK10172 — Caliper Seal 42mm
- • BTW30001 — Adjusting Mechanism Complete (PAN 19.5/22.5)
- • BTW30014 — Caliper Lever (PAN 17/19/22)
- • BTW30016 — Caliper Roller Bearing (PAN/MAXX)
- • BTW30020 — Slide Pin Kit (PAN 19)
- • BTW30031 — Boot & Pin Repair Kit (PAN17)
- • BTW30038 — Gasket Kit (PAN 17.5/19.5/22.5/MAXX)
- • BTW30061-01 — Complete Mechanism Set (MAXX22)
- • BTW30301 — Caliper Complete Set (MAXX22T)
- • BTH90035 — Caliper Guide & Seals Repair Kit (DB22 Modul X)
- • BTS50007P — Caliper Guide and Seal Kit (DB22LT Modul T)
- • Additional Haldex components available — contact for cross-reference
Replacement Rotors
Fraser Gauge replacement rotors are manufactured to OEM dimensional specifications for all major air disc brake platforms. Each rotor is precision-machined to maintain correct running clearance and heat dissipation characteristics. Rotors are available for all EX225, SN7, SB7, PAN, MAXX, ADB22X, and DB22 platforms.
| Platform | Application | Rotor Type | Discard Thickness |
|---|---|---|---|
| Meritor EX225 | Transit Bus / Class 8 Truck | Vented | 37 mm |
| Knorr SN7 | Transit Bus / Steer Axle | Vented | 37 mm |
| Knorr SB7 | Transit Bus / Motor Coach | Vented | 37 mm |
| WABCO PAN 17 | Class 6–7 Truck / Trailer | Vented | 37 mm |
| WABCO PAN 19/22 | Class 8 Truck / Trailer | Vented | 37 mm |
| WABCO MAXX22 | Class 8 Truck / Motor Coach | Vented | 37 mm |
| Bendix ADB22X | Class 8 Truck / Transit | Vented | 37 mm |
| Haldex DB22 | Transit Bus / Coach | Vented | 37 mm |
Service Kit Selection Guide
Selecting the correct service kit requires knowing the caliper platform, the specific failure mode, and whether a partial or complete rebuild is required. The following guide covers the most common service scenarios.
Most common cause of premature pad wear and uneven rotor wear. Replace the complete guide pin, seal, and boot kit — not just the pin.
Recommended: Guide Pin, Seal & Boot Kit for your platform
Indicated by excessive pushrod travel, dragging brakes, or inability to maintain correct running clearance. Replace the complete adjusting mechanism assembly.
Recommended: Adjusting Mechanism Complete for your platform
When the caliper has multiple worn components or has exceeded service life, a complete repair kit covering seals, pins, boots, and internal components is the most cost-effective solution.
Recommended: Caliper Repair Kit or Complete Set for your platform
All components are sourced from Brakingtech and manufactured to OEM dimensional and material specifications. No commodity substitutions.
All disc brake components meet Federal Motor Vehicle Safety Standard 121 requirements for air brake systems on commercial vehicles.
Every Fraser Gauge disc brake component and kit carries a 1-year warranty against defects in materials and workmanship under normal commercial operating conditions.
Order or Cross-Reference Your Disc Brake Components
Browse the full disc brake components catalog, submit your OEM part numbers for cross-referencing, or contact our technical team for application-specific guidance and fleet pricing.