How To Find Out What Pin Box You Currently Have To Determine A Correct Replacement
Question:
Looking to replace the stock pin box on my 2020 cyclone 4006 with the flex air and want to make sure I get the right model.
asked by: Matt L
Expert Reply:
The Trailair Flex Air 5th Wheel Pin Box # LC369535 you mention will replace Lippert 1621 pin boxes, so if you have a 1621 pin box this will work for you. If you are unsure which pin box you currently have, you should be able to locate the manufacturers name, along with the model number printed on a sticker usually on the pin box itself.
If you aren't able to locate any sticker information, then you're going to need to make a couple of measurements. You'll need to measure the horizontal bolt distance, vertical bolt hole distance, bolt size, bolt head size, front row of bolts to king pin, back row of bolts to king pin and pin box width. Also, record the number of bolts per side that secure the pin box to the trailer frame.
Once those measurements are made, you can find out what pin box you have using the chart located in the FAQ attached to this answer page.
(click to enlarge)
(click to enlarge)
(click to enlarge)
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs
- Fifth Wheel King Pin
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs GTW
- Fixed Turret
- Lippert 1621
- CURT
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Aluminum HWT Series S5 Trailer Wheel - 16" x 6-1/2" Rim - 6 on 5-1/2 - Black
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Shop: MORryde Cushioned 5th Wheel Pin Box for 11.5K to 14K Trailers w/ Lippert 1621 and 1621HD
- Shop: MORryde Cushioned 5th Wheel Pin Box for 14K to 18K Trailers w/ Lippert 1621 and 1621HD
- Shop: MORryde Cushioned 5th Wheel Pin Box for 11.5K to 14K Trailers w/ Lippert 1716
- Shop: MORryde Cushioned 5th Wheel Pin Box for Up to 11.5K Trailers w/ Lippert 1621 and 1621HD
- Q&A: What PSI Should My Trailer Tires Be Inflated To?
- Shop: Lippert 1621 5th Wheel Pin Box - 15,500 lbs
- Shop: Fifth Wheel Hitch
- Search Results: curt flex air
- Q&A: How to Determine the Pin Box Manufacturer and Model on a 5th Wheel Trailer
- Q&A: What Is The Difference Between The Curt Flex Air And Lippert Trailair
- Shop: Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs
- Shop: RV Mattress
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Video: Trailer Valet RVR5 Remote-Controlled Trailer Dolly Review
- Q&A: Replacement Jaguar 15 x 6 Wheel for 2019 Grand Design 295RL
- Q&A: Dimensions For MORryde Cushioned 5TH Wheel Pin Box 1716 Replacement
- Q&A: Correct MORryde Pin Box for Grand Design Reflections 337RLS
- Q&A: Recommended MORryde Pin Box For A 2018 Grand Design Reflection 303 With A Lippert 1621 Pin Box
- Video: Review of Maxxair - RV Air Conditioners - MA8335A5261
- Search Results: tpms system
- Video: Review of Lippert Fifth Wheel King Pin - Upgraded Pin Box - LC155943
- Video: Bulldog Winch Portable Air Compressor Review BDW41002
- Video: Review of TireMinder TPMS Sensor - 6 Tire Pressure Monitor Kit - TM29FR
- Video: Review of Tuson RV Brakes TPMS Sensor - RV - Trailer - 335TPMS6WIVS
- Video: B and W Companion Fifth Wheel Hitch Installation - 2019 Ford F-350 Super Duty
- Shop: Gooseneck Hitch
- Search Results: upgraded pin box
- Search Results: pin box
on Fifth Wheel King Pin
