Which EZ-Flex kit will I need?

[GMcKenzie]

Looking to add an EZ FLex and wet bolt kit to my 2010 Cougar 30RKS.

Thinking I need the K71-652-00 kit to get all the pieces, but not sure. Is there some trick to figuring out axle spacing? Or is it a trick with the max rating?

Pretty much just asking how I figure out what parts I need and what I need to look at on the trailer or in the manuals.

Thanks.

[Hblick48]

When I did the EZ Flex upgrade, I sent the dimensions of my old equalizer to Etrailer and they provided the one that fit my rig. Their prices are also very good.

[roadglide]

Measure the center of each bolt on the equalizer spring only. Call e trailer the will help with the order . Mine are heavy duty I'm thinking 7/12 center to center