Sidewinder Compatibility Based on Measurements of Unknown Pin Box

Question:

Hello, I am trying to identify my pin box to add a Reese sidewinder and am hoping you could provide some assistance. I could not find an exact match based on measurements. Here is what I have: 2a: 7 7/8” 2b: 1” 3a: 17 7/8” 3b: 25 1/4” 3c: 12” I am thinking maybe RP61422 would be the correct replacement, but I thought I’d definitely ask you guys first. Thanks!

asked by: Dale W

Expert Reply:

I reached out to my contact at Reese and they said you'd want the # RP61422 you mentioned for air ride in addition to the additional turning clearance or # RP34FR for the basic Sidewinder fit for your measurements. I've attached some videos to assist further.

If your trailer is over 16K, then your only Sidewinder option is # RP34FR which is also a fit.

expert reply by: Jason S