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
- Search Results: hitch extension with step
- Search Results: 2 inch hitch riser
- Shop: TowSmart 7-Way Molded Trailer Wire Connector - 72" Long
- Shop: Hopkins 7-Way Blade-Style Connector w/ Molded Cable and LEDs - Trailer End - 6' - Auto Standard
- Shop: etrailer High-Low Fixed Adapter for Tow Bars - 2" Hitch - 2" Rise/Drop - 10K GTW
- Shop: Trailer Wiring
- Shop: TowSmart 7-Blade Trailer Connector w/ Jacketed Cable - Trailer End - 72" Long
- Q&A: What is the Difference Between 7-Way RV and Utility Trailer Connectors
- Q&A: 7-Way Plug and Lead that Uses Traditional Wiring Color Scheme
- Shop: Hopkins 7-Way Blade Style Connector with Molded Cable - Trailer End - 8' Long - Auto Standard
- Shop: Hopkins 7-Way RV Style Connector w/ Molded Cable and LED Test Lights - Trailer End - 6' Long
- Shop: Front Mount Hitch
- Q&A: Need a Replacement Axle for my Trailer
- Q&A: Torque Specs for Axle Spindle Nut and Lug Nuts
- Q&A: Availability Of Cad Model Of 4-Leaf Slipper Spring # SP-230275
- Article: How to Accurately Measure Trailer Leaf Springs
- Article: Slipper Spring Trailer Suspension System Review
- Article: How to Tell the Weight Rating of a Trailer Axle
- Q&A: Where Should Rear Hanger Location be for Slipper Springs
- Q&A: Overall Diameter Of The Kenda 4.80-12 Bias Trailer Tire with 12" Galvanized Wheel AM30550
- Article: 5 Tell-Tale Signs It’s Time to Replace Your Trailer’s Leaf Springs
- 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.