Who makes 4.5"+ rear HD coils for diesels?

[ZoneArc]

Who has rear HD Coils at a 4.5-5" lift height that are built for heavy loads(diesel + gear)?
Tried Evo and it sags too bad. Had to add a 1.5" spacer to level it within 1/8" of the front. Their kit must be designed for an unloaded bed and no spare tire. But, I have a tire carrier, 40" spare. Roof rack, etc. That added 500lbs is too much for the coils so there has to be someone else making Diesel springs with a higher spring rate.

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[pokey02]

Rustys Offroad has a 4" coil. I have no experience with them, but I think I read somewhere they are made by Eibach.

Also don't know if they are diesel specific.

 

[Chance575]

Why not just put a set of air bags in the spring

 

[ZoneArc]

That's exactly what I did. I have a pair of stacked airbags in the spring (since they don't make them tall enough to do just 1).
Running air bags helps counter the tongue weight of additional loads such as when I add a trailer. However, it also adds resistance to the spring even at the minimum 5lbs you need to maintain in the spring. While you won't feel this resistance on the road as your spring doesn't compress enough in that state, when you go offroad you lose multiple inches of uptravel.
The next issue is that if your spring has too low of spring rate, then you have more body roll and too much compression on bumps and too slow of rebound as well.
I also feel that its L A M E to spend $7000 on a lift kit where I had to add a poly 1.5" puck and airbags to compensate.
I think there's no other choice than to call everyone and find out if anyone has a spring they are working on that'll be designed for "overlanders" in mind who will load their truck up with gear.

 

[AjMac]

That's exactly what I did. I have a pair of stacked airbags in the spring (since they don't make them tall enough to do just 1).
Running air bags helps counter the tongue weight of additional loads such as when I add a trailer. However, it also adds resistance to the spring even at the minimum 5lbs you need to maintain in the spring. While you won't feel this resistance on the road as your spring doesn't compress enough in that state, when you go offroad you lose multiple inches of uptravel.
The next issue is that if your spring has too low of spring rate, then you have more body roll and too much compression on bumps and too slow of rebound as well.
I also feel that its L A M E to spend $7000 on a lift kit where I had to add a poly 1.5" puck and airbags to compensate.
I think there's no other choice than to call everyone and find out if anyone has a spring they are working on that'll be designed for "overlanders" in mind who will load their truck up with gear.

Did you figure it out? Rock Krawler has a 4.5 spring for the diesel.

I am about to buy my lift from MC, and they are including Evo 4.5 HD springs front, and regular evo 4.5 rear, but I plan on buying the RK's if they dont work out.

 

[ZoneArc]

Theirs sagged after the weight I put on them.

Ended up using 6.5" Diesel springs. That gave me a 1" rake without a trailer and dead on with any tongue weight.

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