MADE IN VIETNAM
TBP-0540021
16.5″ × 8.62″ Brake Drum
INTERCHANGE WITH: 3807AX · A-3807X · R66864B
Wide-body rear / trailer brake drum for heavy Class 8 applications requiring maximum lining area. 16.5″ × 8.62″ outboard mount with the extended drum width suited to high-GVW drive axles in logging, oilfield, and bulk tanker operations.
16.5″DIAMETER
8.62″WIDTH
110 lbWEIGHT
G3500GRAY IRON
Technical data sheet
TBP-0540021 · REV 03/2026DIMENSIONS
Overall depth8.62 in
Brake surface dia16.62 in
Pilot diameter8.75 in
Bolt circle · holes11.25 in · 10
MaterialG3500 (ASTM A48 CL35 eq)
Hardness187–241 HB
Weight110 lb
CROSS-REFERENCE
Meritor / Rockwell3807AX · A3807X
GuniteA-3807X · S-24085
ArvinMeritorR66864B
CHECK YOUR PART # →FITMENTS
- Meritor RS-21-230 rear drive axle
- Meritor RS-23-161 tandem drive
- Hendrickson RTLOC heavy-duty tandem
- Kenworth T880 vocational spec
- Mack Pinnacle axle-back configuration
- Vehicles exceeding 80,000 lb GVW
Why this drum
Extended 8.62″ lining area for maximum braking force at high GVW
Balanced casting for vibration-free operation under heavy load
FMVSS 121 compliant
Phosphate + oil treatment to prevent bore corrosion
Vietnam origin, zero anti-dumping duty to the US
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