Battle Born Offroad
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Code is fixed!! 27 in stock
BILSTEIN 6112 / 8112 Heavy Rate Spring Upgrade Now Available! PN 53-291387
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Battle Born Offroad
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Yes, those are the correct front 5100 shocks!
24-196499 - BILSTEIN Truck & Off Road - B8 5100 Series Shocks - Battle Born Offroad - Your Top Offroad & 4x4 Part Source
use code T4R
Battle Born Offroad
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Inventory updated! Thank you for the continued orders
Battle Born Offroad
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MAST4R
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Are we sure the regular 6112 springs are 600lb? I had 586lb Dobinsons springs on stock shocks and I have been paying very close attention to every facet of performance since I bought the 4R 26,000 miles ago. We have done plenty of offroading in all sorts of terrain also.
Here are reasons I wonder, admittedly some based on unusually punishing for suspensions terrain. I am talking undulating volcanic ash terrain, where the stock suspension can manage 5-8 mph. The surface is like a sea with waves of different sizes, shapes, and widths. And these are the normal trails/roads, not what the OHVs drive.
1/ I cannot count the NEAR-bottom out events. Does this mean a softer spring and a powerful shock (which it is) that also has an internal bump stop? It felt like the shock was working overtime whereas the spring was casually answering work emails while watching a football game.
2/ In contrast to the front, the Icon 2.0 rear shocks and 1" Eibach spring felt like working in concert. Much more predictable, no near misses, only felt like they might bottom out a couple times.
3/ Over normal/standard rough forest road terrain, the 6112 did very well to prevent bottoming out. However, the front felt bouncier than I thought it would be based on my Dobinsons front coils experience.
4/ Set on 2 and 4, the 6112s gave me 0.8-0.9 in of lift and not 1.2 (no permanent front weight per se; 250lb from skids and sliders overall). The 586lb Dobinsons gave me 1 and 1/8.
5/ About 2-3,000 miles ago, my two older Wildpeaks suddenly started to ride rougher than before, as they reached 7/32nds. These are on the front. Installing the 6112 immediately restored the bit of ride quality that was lost. Softer spring rate?
6/ The common industry wisdom is that you want the softest spring that will do the job with a very powerful shock that will do the heavy lifting. This feels to be the case here.
So, is the 6112 spring really 600lb?
Does the 6112 shock have a really good internal bump stop or whatever the correct technical term is?
If the answers are "yes" and "no," then what explains what I observed? Can the Dobinsons rate be actually higher (guess I know whom to ask about that!).
Otherwise, the 6112 front and Icon 2.0 provide amazing control off road, as expected.
Here are reasons I wonder, admittedly some based on unusually punishing for suspensions terrain. I am talking undulating volcanic ash terrain, where the stock suspension can manage 5-8 mph. The surface is like a sea with waves of different sizes, shapes, and widths. And these are the normal trails/roads, not what the OHVs drive.
1/ I cannot count the NEAR-bottom out events. Does this mean a softer spring and a powerful shock (which it is) that also has an internal bump stop? It felt like the shock was working overtime whereas the spring was casually answering work emails while watching a football game.
2/ In contrast to the front, the Icon 2.0 rear shocks and 1" Eibach spring felt like working in concert. Much more predictable, no near misses, only felt like they might bottom out a couple times.
3/ Over normal/standard rough forest road terrain, the 6112 did very well to prevent bottoming out. However, the front felt bouncier than I thought it would be based on my Dobinsons front coils experience.
4/ Set on 2 and 4, the 6112s gave me 0.8-0.9 in of lift and not 1.2 (no permanent front weight per se; 250lb from skids and sliders overall). The 586lb Dobinsons gave me 1 and 1/8.
5/ About 2-3,000 miles ago, my two older Wildpeaks suddenly started to ride rougher than before, as they reached 7/32nds. These are on the front. Installing the 6112 immediately restored the bit of ride quality that was lost. Softer spring rate?
6/ The common industry wisdom is that you want the softest spring that will do the job with a very powerful shock that will do the heavy lifting. This feels to be the case here.
So, is the 6112 spring really 600lb?
Does the 6112 shock have a really good internal bump stop or whatever the correct technical term is?
If the answers are "yes" and "no," then what explains what I observed? Can the Dobinsons rate be actually higher (guess I know whom to ask about that!).
Otherwise, the 6112 front and Icon 2.0 provide amazing control off road, as expected.
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MAST4R
New member
Let's verify my part numbers.
My springs are stamped z005b50. This is the FJ number but the two springs are supposed to be the same. So it should not matter?
The big box number is the correct one that ends in 768. It is not the FJ part number so that checks out.
The sticker on the shock is: 24-259118. Seems right, too.
So if there is no mixup, then this makes it MORE interesting.
If the Dobinsons and Billstein spring are the same rate, then the very different feel has to be entirely a function of the shock. So the stiffer feel of the Dobs coming from the weak stock shock and the very soft feel of the Billstein coming from the powerful 6112 shock that controls the spring with ease. But I guess I like a bit of a stiffer spring
What do you think, [MENTION=144545]Battle[/MENTION]_Born_Offroad ?
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SteadFAST 4Runner
New member
I have a similar setup 6112s up front and Icon 2.0s in the rear with a stock spring and 1.5 spacer... I havent experienced a "bottoming out" with my 4Runner in the front but in the rear it has a couple of times... so I upgraded my rear spring to a Dobinsons 3" variable rate spring which I havent tested off road yet.
How fast are you going when you bottom out?
I have had Bilsteins on a few vehicles and it had a great ride both on and off-road. I would like to try Fox, King, Icon to see if they are better but I am not in a hurry.
MAST4R
New member
I did not bottom out, just felt like I am just about to...and then did not.
When the front skid touched the cinders I was at 17. But that's Cinder Hills. It is unique. Stock, I would have been doing 5-7 on that spot.
The main loop that is used to get to Double Crater is much better. It only has one short section that is like this. The back loop, on the east side, was like this for the entire 11 miles.
I saw two UTVs go really fast on one of the big open areas. There was an XJ after them, decent speed, not as fast, quite bouncy but not awful. I am curious what suspension it was running.
I am not into sports and that terrain answered for me the question of why small sporty UTVs run giant for their size shocks and springs. Watching them flat vs the bouncing behind them XJ really drove the point home.
EDIT: as for the rear, thank you very much for that info. So the Icons were not enough to compensate for the awful stock springs? Good to know. I wonder if the stock rate Billstein 1.5" springs would. The theory is softest spring with powerful shock but maybe that means a 2.5 shock which would not work with the 6112s because one should not run a larger shaft in the rear. Or so I was told by the owner of Radflo. I really wanted their 2.5 rear. The 6112 probably has an awkward shaft because it was designed for heavy trucks and only accidentally became a performance shock, too.
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Akkording
Member
[MENTION=306890]MAST4R[/MENTION]
I've been following your issues. Just curious have you upgraded the stock bump stops or have any intentions to.
I would also suggest you call Bilsteins to confirm the specs on the two different model springs to see what are the specs difference.
I believe Bilsteins have two 6112 kits that would fit our T4R one model one for FJ and one for 4runner/GX and my assumpsution is the springs may be labeled differently for each kit.
I sold [MENTION=303056]Bayou_Pro[/MENTION] my 6112 model springs labeled
E4-FD1-Y005B29
from the 4runner/GX 6112 kit, bought from a local GX owner. I ended using 650# King since I added the C4 lopro and winch and upgraded to some $20 Engery Suspension bumpstops I accidentally discovered that fits.
Good luck I hope you tackle this issue and fine tune your 4Runner to your liking.
I've been following your issues. Just curious have you upgraded the stock bump stops or have any intentions to.
I would also suggest you call Bilsteins to confirm the specs on the two different model springs to see what are the specs difference.
I believe Bilsteins have two 6112 kits that would fit our T4R one model one for FJ and one for 4runner/GX and my assumpsution is the springs may be labeled differently for each kit.
I sold [MENTION=303056]Bayou_Pro[/MENTION] my 6112 model springs labeled
E4-FD1-Y005B29
from the 4runner/GX 6112 kit, bought from a local GX owner. I ended using 650# King since I added the C4 lopro and winch and upgraded to some $20 Engery Suspension bumpstops I accidentally discovered that fits.
Good luck I hope you tackle this issue and fine tune your 4Runner to your liking.
MAST4R
New member
Thanks! I may have created a wrong impression, I am not having any issues at all but rather a learning experience. Cinder Hills is very unusual terrain and they still performed far better than stock. Yesterday, we drove a variety of dirt road terrain, including a high clearance dirt road. The 6112s were perfect in both performance and comfort. That was the kind of terrain I really wanted to see the 6112s in.
I did call Billstein and they all seem to check out. The springs do have the FJ part number but they said that FJ and 4R springs are both 14" and 600lb.
So all is good! I don't think I will learn much more till the winter though.
I have FJ TRD pro suspension on my 4runner. I was thinking about upgrading to a c4 lopro bumper with winch. Is this spring going to achieve additional lift of .7”?
I also have a cornfed 1.5” spacer on it... can I still use the spacer or is the added height and # just going to help with the additional weight?
Sent from my iPhone using Tapatalk
I also have a cornfed 1.5” spacer on it... can I still use the spacer or is the added height and # just going to help with the additional weight?
Sent from my iPhone using Tapatalk
47-284142 has 700 lb springs and has a lot more control in the valving. and yes it will work on 4th gen 4runners
interested! pls pm
MAST4R
New member
It took forever, and I have been on 650lb springs for more than a year, but I can now answer my own questions.
1/ No, the 6112 standard spring is not 600lb. It is max 550.
2/ The 6112 strut is indeed quite capable.
Also, the 8112 uses the same spring as the standard 6112. That does not necessarily mean the softer spring makes the 8112 need the 650 for more serious offroading as it does with 6112. I have to drive the 8112 to see how the three-zone design would work with the softer spring.
Battle Born Offroad
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Expecting these back in one week
