Availability of 1 Inch Diameter Trailer Spindle To Fit on 1.25 Square Axle
Question:
Current spindles are 1inch diameter mounted into a 1.25 inch square axle. Is item TRU97FR—1inch spindle to 1.50inch square—your closest match and what I need for spindle replacement? Can a welder fill that quarter-inch void easily and safely enough? Thanks.
asked by: Jeff
Expert Reply:
The two spindles that I have to fit a square axle are designed with a square stub diameter of 1.50 inches. The TruRyde BT8 Spindle 1-1/2" Square # TRU97FR, you have referenced is for 2,000-lb axles and the TruRyde Spindle, part # TRU47FR, is for 3,500-lb axles. They use different bearings and seals.
I am including a link to a product page that will list the dimensions on the trailer spindles we have available.
Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The most common place to find axle capacity is on a plate or sticker on the trailer frame on or near the tongue. If there is no plate or sticker on the trailer I would recommend to get the inner and outer bearing numbers stamped into the metal of the bearings. Going by those numbers, wheel size, and bolt pattern, we can determine the probable axle capacity.
To replace a spindle, the old one would need to be cut off, and the new one welded into place. This is NOT a job for the do-it-yourselfer. The new spindle must be absolutely square with the axle in order to prevent premature tire wear and wheel tracking problems. I would recommend finding a welder who is experienced with trailer axles and find out from him if you would be able to use the 1.50 inch stub spindle on your 1.25 inch square axle. Your local RV dealer or repair facility could probably refer you to a welder.
Products Referenced in This Question
Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide
- Trailer Spindles
- Standard Spindle
- 1-1/2 Inch Diameter
- Square
- For 3500 lb Axle
- TruRyde
more information >
Product Page this Question was Asked From
Square BT8 Spindle for 2,000-lb Trailer Axles - 1-1/2" Wide
- Trailer Spindles
- Standard Spindle
- 1-1/2 Inch Diameter
- Square
- For 2000 lb Axle
- TruRyde
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Q&A: How to Tell if Trailer has a BT8 or BTR Spindle Installed
- Article: Trailer Tire Sizing
- Q&A: How to Mount the Yakima OutPost HD Ladder Rack on a Utility Trailer
- Q&A: Recommended Parts to Flat Tow a 2021 Chevy Tahoe Premiere
- Q&A: Length of Replacement Handle with Claw Knob for Square Jacks
- Article: Double-Eye Trailer Suspension System Review
- Q&A: Can Slipper Spring SP-179275 Replace 25 inch Flat Slipper Spring on Utility Trailer
- Q&A: How To Find Leaf Spring Hanger Spacing with Single-Axle Trailer Hanger Kit for 1-3/4" Slipper Spring
- Article: Trailer Maintenance Schedule
- Q&A: Process for Changing a Damaged Spindle on a Trailer Axle
- Article: Most Popular Wheel Bearings
- Article: How to Accurately Measure Trailer Leaf Springs
- Article: Where to Position the Trailer Axle?
- Article: How to Install a Trailer Hitch
Ryan C.
6/4/2020
I am looking for tie plate kit for a 1.25" square axle but I can't find anything smaller than 1.5". The current set up uses 1 tie that goes across the axle diagonally.