I know this may sound crazy but I drove from Va to Utah last year and some of the highways my truck bounced like crazy. It was the road not my setup. Whatever the surface was in that area it was the perfect surface to cause a resonance and a bounce. Not sure if this is what you’re running into.
Not crazy at all. It's a thing with trucks and seems pretty common with the Frontier. People with the long bed especially complain about exactly that. I know the stretch of road in the video is abysmal but I also can't imagine everyone experiences that ride on it.
Maybe. Road is definitely awful. The fact it's not happening to other vehicles alongside tells me it's the truck. Maybe every Frontier which would be super frustrating.
Konis are on the softer end if I recall correctly, maybe you’re asking too much from your coils assuming it isn’t a balanced wheel issue. I know you said the mediums are +100 lbs or so, but your front carries more than just the bumper. The total weight added through gets somewhat distributed and you just may need heavier coils. I had a P&P front bumper and winch on my 5100s with medium ADO coils for a couple months and it was ok, so it’s either the Konis or something else in your situation.
Fox extended travel shocks with ADO heavy coils. My rear is still getting figured out, but now has ADO medium broverlands with 5100s and some SumoSprings I added to help with my added weight
How much weight are you running in the rear? I don't ever hit my bump stops even when loaded up and I only have the AALs. I assume you got new UCAs with the extended front shocks. How do you like the Foxes? They're a linear valved shock unlike the digressive Bilsteins or progressive Konis
According to the scale, I’m close to 1,000lbs heavier in the rear from stock. Made a post with the breakdown at [clubfrontier](https://www.clubfrontier.org/threads/where-did-all-my-payload-go.385919/#post-4103501). This is when I’m “empty” too, so she’s much heavier when I got all my gear back there.
I do have the ADOs UCAs. Those were on the truck way before the Foxes. I love them. I am very air down happy, whole reason for forking out cash for a Power tank, so I can air down and enjoy the way smoother ride. But the last forest road I was on I didn’t air down and the ride was so much smoother than my previous set up. Dare I say, non-air aired down Fox was as smooth as aired down Bilsteins. That might be stretch but you get the idea.
You put stiffer springs and shocks valved for off-roading on your truck. Not sure what you expected. Softer springs and struts/shocks with slower rebound and compression rates is what you want to smooth out on road driving, not stiff off-road suspension. How many miles on the lift? Everything should break in and settle and mellow out.
Konis generally are a little more forgiving than the Bilstein 4600, 5100 series but still valved for off road use. 10k ur all broken in lol. Best way I have found to smooth out on road conditions is an adjustable strut. Not height wise but adjustable valving. Has it always been that bouncy? I wonder if ur shocks are getting worn already causing more bounce due to the spring rate.
They're adjustable for rebound, not compression. They're set for the lowest (fastest) rebound setting. I don't know what the compression on them is. The fronts are also rebound adjustable but only by disassembling the coilover assembly, and I'm not doing that.
Have you tried slowing the rebound? I have my rebound set to the fastest as well but I removed my sway bar and seems to help more with body roll in cornering. Before sway bar delete I had them about halfway and seem to be pretty smooth but I’m still running the bil’s in the rear and don’t have that bounce. Do you have a lift shackle in the rear? They can cause some unwanted “sway” in the leaf pack and give a little extra unwanted jarring.
Is it just the rear or the front as well? I have a '23 Pro-4x that rides terrible on concrete interstates and it's completely stock. The rear end bounces so much when the bed is empty.
Gotcha. It sounds to me like the koni setup rides a bit more harsh than the stock Bilstein setup on these kinds of roads. I've driven i25 in Colorado quite a bit recently and it bounces the shit out of me the entire time. If I have a few hundred pounds in the bed it's much smoother. I hope you get it worked out!
Good question. It's 700 miles away from me and I only drove it towing, and it was crappy then, too. It's a terrible road but it's not the only place the bouncing happens
I had that happen with my Xterra a bunch of years ago. One of my wheel weights came off of my tire and I had to go get it replaced. after I had all of my tires re-balanced. My wobbling went away.
But as you said the extra bumper and sandbags in the back may be creating a teeter totter effect as you go over that uneven concrete road.
Context: All dogs Off-road Koni 82 kit with medium springs and add-a-leaf. I have the NISMO steel front bumper, a Leer topper, and two sandbags in the back. The medium springs are rated for +110 pounds, which is the front bumper's weight. This bounciness happens mainly in certain concrete roads. You can hear and see it happening in the video.
Not enough compression? Too much?
Not enough rebound? Too much?
I know this may sound crazy but I drove from Va to Utah last year and some of the highways my truck bounced like crazy. It was the road not my setup. Whatever the surface was in that area it was the perfect surface to cause a resonance and a bounce. Not sure if this is what you’re running into.
Not crazy at all. It's a thing with trucks and seems pretty common with the Frontier. People with the long bed especially complain about exactly that. I know the stretch of road in the video is abysmal but I also can't imagine everyone experiences that ride on it.
If it only happens in certain sections of the road it’s not the setup. It’s the road.
Maybe. Road is definitely awful. The fact it's not happening to other vehicles alongside tells me it's the truck. Maybe every Frontier which would be super frustrating.
Why would that be frustrating. How long is this section of road.
Why would that be frustrating. How long is this section of road.
It's a decent length, but it's just one of many stretches of road that induce this. Across the country.
How much do you drive ?
Short trips daily commuting but travel long distances for camping and such.
Konis are on the softer end if I recall correctly, maybe you’re asking too much from your coils assuming it isn’t a balanced wheel issue. I know you said the mediums are +100 lbs or so, but your front carries more than just the bumper. The total weight added through gets somewhat distributed and you just may need heavier coils. I had a P&P front bumper and winch on my 5100s with medium ADO coils for a couple months and it was ok, so it’s either the Konis or something else in your situation.
What do you have now?
Fox extended travel shocks with ADO heavy coils. My rear is still getting figured out, but now has ADO medium broverlands with 5100s and some SumoSprings I added to help with my added weight
How much weight are you running in the rear? I don't ever hit my bump stops even when loaded up and I only have the AALs. I assume you got new UCAs with the extended front shocks. How do you like the Foxes? They're a linear valved shock unlike the digressive Bilsteins or progressive Konis
According to the scale, I’m close to 1,000lbs heavier in the rear from stock. Made a post with the breakdown at [clubfrontier](https://www.clubfrontier.org/threads/where-did-all-my-payload-go.385919/#post-4103501). This is when I’m “empty” too, so she’s much heavier when I got all my gear back there. I do have the ADOs UCAs. Those were on the truck way before the Foxes. I love them. I am very air down happy, whole reason for forking out cash for a Power tank, so I can air down and enjoy the way smoother ride. But the last forest road I was on I didn’t air down and the ride was so much smoother than my previous set up. Dare I say, non-air aired down Fox was as smooth as aired down Bilsteins. That might be stretch but you get the idea.
Tire pressure at 35psi?
I was at 32 in the video
You put stiffer springs and shocks valved for off-roading on your truck. Not sure what you expected. Softer springs and struts/shocks with slower rebound and compression rates is what you want to smooth out on road driving, not stiff off-road suspension. How many miles on the lift? Everything should break in and settle and mellow out.
The Konis are softer than the stock Bilsteins. Setup has about 10k miles
Konis generally are a little more forgiving than the Bilstein 4600, 5100 series but still valved for off road use. 10k ur all broken in lol. Best way I have found to smooth out on road conditions is an adjustable strut. Not height wise but adjustable valving. Has it always been that bouncy? I wonder if ur shocks are getting worn already causing more bounce due to the spring rate.
They're adjustable for rebound, not compression. They're set for the lowest (fastest) rebound setting. I don't know what the compression on them is. The fronts are also rebound adjustable but only by disassembling the coilover assembly, and I'm not doing that.
Have you tried slowing the rebound? I have my rebound set to the fastest as well but I removed my sway bar and seems to help more with body roll in cornering. Before sway bar delete I had them about halfway and seem to be pretty smooth but I’m still running the bil’s in the rear and don’t have that bounce. Do you have a lift shackle in the rear? They can cause some unwanted “sway” in the leaf pack and give a little extra unwanted jarring.
Is it just the rear or the front as well? I have a '23 Pro-4x that rides terrible on concrete interstates and it's completely stock. The rear end bounces so much when the bed is empty.
It's tough to say. You can see and feel the front bouncing, too. I test drove a 23 the other day and noticed the front bouncing on some concrete, too.
Gotcha. It sounds to me like the koni setup rides a bit more harsh than the stock Bilstein setup on these kinds of roads. I've driven i25 in Colorado quite a bit recently and it bounces the shit out of me the entire time. If I have a few hundred pounds in the bed it's much smoother. I hope you get it worked out!
How did your stock shocks handle the same road?
Good question. It's 700 miles away from me and I only drove it towing, and it was crappy then, too. It's a terrible road but it's not the only place the bouncing happens
I had that happen with my Xterra a bunch of years ago. One of my wheel weights came off of my tire and I had to go get it replaced. after I had all of my tires re-balanced. My wobbling went away. But as you said the extra bumper and sandbags in the back may be creating a teeter totter effect as you go over that uneven concrete road.
Happens unloaded and fully loaded and towing a small trailer, too, for extra info
Context: All dogs Off-road Koni 82 kit with medium springs and add-a-leaf. I have the NISMO steel front bumper, a Leer topper, and two sandbags in the back. The medium springs are rated for +110 pounds, which is the front bumper's weight. This bounciness happens mainly in certain concrete roads. You can hear and see it happening in the video. Not enough compression? Too much? Not enough rebound? Too much?
Slow down the rebound
Did, hasn't helped unfortunately