Replacement Leaf Spring for 1969 Bock Dragstar Race Car Hauler
Updated 10/30/2025 | Published 10/14/2025
Question:
Rebuilding a vintage 1969 Bock Dragstar race car hauler. Previous owner said he upgraded to 3500 lb. axles in the 1970s. Axle tubes measure 2.375inch diameter. Current springs are 4 leaf slipper style, 26 1/2inch to 26 5/8inch eye to end of spring. Leaf thickness is .375. Am thinking about replacing the springs since the trailer has gone countless miles traveling to dragstrips across country for many years. Would you recommend SP-230275 springs as a replacement?
asked by: Rick S
(click to enlarge)
Expert Reply:
Hey Rick, yes based on what you described the replacement slipper spring part # SP-230275 would be the correct replacement that would work well. It's for a 4k axle and it has the same length you need.
That's a sweet race car! I don't know Mopars that well so I am not sure exactly what it is but it's a great looking muscle car!
Product Page this Question was Asked From
4-Leaf Slipper Spring w/ Hook End for 4,000-lb Trailer Axles - 26-5/8" Long
- Trailer Leaf Springs
- Slipper Springs
- 9/16 Inch Eye
- Nylon Bushings
- 4000 lbs
- 2 Inch Wide
- 4 Leaf
- 26-5/8 Inch Long
- Standard Grade
- Universal Group
more information >
Continue Researching
- Shop: Rubber Gasket for 4" Round, Flange Mount Lights - Black
- Shop: Buyers Products Class 5 Service Body Hitch Receiver - 2-1/2"
- Shop: Buyers Products Class 5 Service Body Hitch Receiver - 2"
- Shop: Curt Front Mount Trailer Hitch Receiver - Custom Fit - 2"
- Shop: Stromberg Carlson Adjustable Accessory Hitch Receiver - 49-1/2" to 76-1/2" Wide - 2"
- Article: How to Accurately Measure Trailer Leaf Springs
- Q&A: What is Diameter of Fastway Zip Trailer Breakaway Switch # FA80-00-2060
- Q&A: Does Install of Replacement 8-Function Receiver for Lippert MyRV Require Programming
- Q&A: Determining Correct Replacement Bearings and Seals for 6,000 Pound Axles
- Article: Slipper Spring Trailer Suspension System Review
- Article: 5 Tell-Tale Signs It’s Time to Replace Your Trailer’s Leaf Springs
- Q&A: Comparing Hydrastar Electric Over Hydraulic Versus Hydrastar Marine Electric Over Hydraulic Actuator
- Q&A: Installation of Slipper Spring with Open Eye End
- Q&A: Is Bushing Required on Open Eye End of Slipper Spring
- Q&A: Brake Controller Recommendation for a Truck with Air Brakes and a Trailer with Electric Brakes
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: Trailer Wiring Diagrams
- Article: How to Measure Your Trailer Wheel Bolt Pattern
Jameson C.
10/30/2025
Hey Rick, how did the new slipper springs work out on your vintage Dragstar hauler? Your update could make it easier for others restoring older race trailers.