What Is The Brake Flange Bolt Spacing For Terran Axle Electric Trailer Brakes TX97ZJ?
Updated 02/02/2026 | Published 12/04/2025
Question:
Hello, I am rebuilding an older trailer. There are not any axle ID numbers, so my guess is it is a 3500 axle since all the info I find matches. The only info I cannot find is the brake flange bolt spacing. Thanks, Dan
asked by: Dan M
Expert Reply:
Hey Dan, thanks for reaching out. The Terran Axle Electric Trailer Brakes # TX97ZJ use a standard 4-bolt brake flange. The spacing between the bolt holes is 2-7/8" center to center. This is standard for modern 3,500 lb axles. Some older axles do not use the same standard bolt spacing so you will definitely want to measure and confirm this matches. I edited a picture to help illustrate.
What kind of trailer do you have?
(click to enlarge)
Product Page this Question was Asked From
Terran Industries Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand - 3.5K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- 13 Inch Wheel
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- Terran Industries
more information >
Featured Help Information
Instructions
Continue Researching
- Search Results: dexter axle trailer brakes
- Video: A Look at the Terran Industries Electric Trailer Brakes
- Shop: etrailer Electric Trailer Brakes - 10" - Left/Right Hand Assemblies - 3,500 lbs
- Shop: Terran Industries Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand - 3.5K
- Video: Review of Terran Industries Trailer Brakes - Left And Right Hand Self Adjusting Electric - TX97ZJ
- Search Results: leaf springs
- Search Results: brake kit
- Search Results: brake
- Search Results: brake magnet
- Search Results: 4 leaf springs
- Search Results: tie plate
- Q&A: How To Tell The Difference From Right and Left Electric Brake Assemblies
- Shop: Lippert Brake Drum and Hub Kit - 3,500 lb Axles - 10" Diameter - 5 on 4-1/2 - 1/2" Studs
- Shop: U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts
- Video: Dexter Heavy Duty Suspension Upgrade Kit for Single Axle Trailers Review
- Video: Ultimate Overview of the U-Bolt Plate for 2-3/8" Diameter Axle, 1-3/4" Wide Spring
- Video: What to Know About the Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers
- Shop: Mounting Hardware for 10" Brake Assemblies
- Shop: TruRyde Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Article: How to Measure a Trailer Axle
- Shop: etrailer Rust-Resistant 4-Leaf Double Eye Spring for 3.5K Trailer Axles - 25-1/4" - Dacromet
- Video: A Closer Look at the Dexter Trailer Axle Beam with EZ-Lube Spindles
- Video: This Old Trailer: Electric Trailer Brake Installation Part 1
- Shop: Brake Controller
- Q&A: How to Find Which Trailer Brake Assembly Goes on the Left or Right Side of a Trailer
- Article: Parts Needed to Add Electric Drum Brakes to a Trailer
- Shop: Vehicle Lights
- Q&A: Need a Replacement Axle for my Trailer
- Q&A: Replacement Hub and Drum Assembly for 1993 and 2001 EZ Loader Boat Trailer
- Q&A: Does it Matter Which Trailer Brake Assembly is Right and Which is Left
Jesse M.
12/29/2025
Hey Dan, how did your measurements turn out on the brake flange for your trailer rebuild? It’d be great to know if the spacing matched the standard 3,500 lb axle pattern. Your update could make it easier for others working on older trailers.