@Crikeymike can you answer my question above?

The C59-749V, but I won't suggest those for a vehicle with KDSS

Sagging is a sign of something wearing out. Aka saggy boobs. Squatting due to added weight is what happens when more and more weight is added. The other coils squatted too much by all the weight that was added.

Mike,
Which spring would you recommend for someone like me. Here's the weight that I have on mine currently:

- 150 lb RTT, don't plan on running this all year
- Skid set, 130 lbs
- Ultraswing with tire and accessories - 180lbs
- Hybrid bumper and winch - 170 lbs
- 60ish lbs of gear

I will eventually add my drawer setup back, no idea how much that weighs.

I was thinking the 677V, but maybe I should look at the 701V?

Without the drawers, the 677V would do the job just fine. A lot of drawer systems are 150LBS empty, then people tend to keep them full, so it could end up being 200-300lbs additional. You may end up needing the 701V's then, depending what sort of final ride height you're looking for.

Mike, I'm assuming this is due to the amount of lift you'd gain with these coils and over-extension of the KDSS piston?

I know it's a different company, but if that's the case the KDSS drop brackets MIGHT help out - they are supposed to allow an extended travel setup with no issues - but I have ZERO experience with them, just throwing it out there.

On a side note, the 677V are okay on KDSS, correct? Just getting bad ideas for the future

It's the fixed side of the sway bar in the KDSS system (fixed on the right side) that won't allow for that much lift. The new spacers on the market to space down the mounts could fix that, but longevity has yet to be seen. Ever noticed the KDSS sway bars seem to be 2x thicker than a regular sway bar? Incredible forces going thru that arm, so we'll see if some machined spacers can hold up to that or not.

It's anything above 2.5" that the lean can't be pushed out of it, not without modifying something. Sure the coils may physically fit, but you also may physically have a 1" lean or something crazy, and you know how forum guys normally lose their s**t when they're out 1/4"... It's a problem I try to avoid having.

Makes sense on both regards - seems like a neat product but I'm not jumping to make any changes yet. Good to know it's the lift as the biggest thing - mostly was wondering in case any weight went into the back down the road!

I think I'm going to stick with the 677V. I've experienced too stiff before and that shit sucks (896s with like 100 lbs lmao), especially if I'm not running the RTT all year round. I'm really just trying to do a slightly forward rake. Something like a 3/2.25 lift. Plus, my drawer setup isn't going to be two full drawers and I'm not planning to use it for sleeping since RTT, so I can cut down on the thickness.

I also realized I probably shouldn't count the 50lbs of of wheel and tire that is usually the spare and just add the difference, which is about 30lbs. So overestimating I think.

Thanks for the help Mike.

So I just ordered the extreme HD from the suggestion of one of your guys on the phone. Just want to make sure I ordered the right thing.

My rig has a rear dual swing out bumper that carries 5 gallons of water on trips, rarely 5 gallons of gas, tire, hi lift, trasharoo, small propane tank, shovel, ax, fridge, stove, one drawer and then the usual camping stuff/gear, roof rack, and baroud tent. Did I go the right direction with the extreme HD? Thanks!!

It must have been another vendor, not me.

Yeah, as long as you want a solid 3" of rear lift, it sounds like you've got a very heavy rear setup with a lot of leverage on the rear suspension.

Running 749Vs in the rear of my KDSS-equipped rig with the KDSS spacers. Works very well and flexes out great. I also have a prototype switch that relaxes the KDSS system on command, not just below 12 MPH. This has been a game changer so far with the 749Vs. stay tuned. As long as the springs dont start sagging like my old OME 2899s it will be awesome.

Alright, so Mike, I did buy 677Vs but since then, I did add a roof rack. I don't have my full skid set yet, but I have a front and trans skid. I haven't even installed the 677Vs yet because I think I should just jump to the 701V.

Reiterate the weight:
Ultraswing - net 150lb increase on back end with larger tire
RTT - 150 lb
Rack - 50 lb
Awning - 30 lb
Front/trans skid + eventual transfer case - 130 lbs
Gear - 60 lbs

I do have a the winch + hybrid bumper up front, but the 352s will take care of that .

THAT SAID, I'm really just looking for a net 2.5" lift. If I'm basically carrying 550-600 lbs at any given point, am I going to get that with the 701V? Your website seems to imply I'll get the full 3.0" even with 600lbs.

The rear weight would only be:
RTT
1/2 the rack weight
A fraction of the awning weight
Gear

Front skid plates don't affect the rear.

Yes, the 701V's are intended for 3" lift with 600LBS, and I don't think you're close to that. You're at about 250LBS from what I can tell with what you've listed. I think you should run the 677V's.

Much appreciated Mike. I also have sliders, but I'm still out to that max weight by a distance since I'd split that too.

I'm going to try to get the 677s in tonight.😊

What would be the negative to running these with just a rear bumper, and half weight of sliders/rack (approx 340lbs constant)? Just rougher feeling in the rear? For trips the rear would be loaded to the 700 range. Have friends with similiar setups who went 701 and then ugpraded to 749.

Is it just harsh ride? Or can damage be done?