Wheeler Offroad "Superbumps" installed.

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Sep 11, 2016
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So after reading on a few forums about Wheelers Offroad bump stops I found that the part number that fits the FJ Cruiser is also compatible with the LC100/LX470 chassis. Over the LCA there are two positions where you will find the OEM bump stops. You could mount the Wheelers "Superbumps" in all four positions or as I have done, you can mount them in only the forward or only the rear position*. This allows the OEM bump stop still mounted in the rear position to act as a compression limit. While the "superbump", in my opinion, makes the suspension travel compress in a much smoother, linear and controlled manner.*

I have only read a few instances of people using these bump stops on the LC100 chassis. So there is very little info about them in regard to this chassis, good or bad. Most write ups that I have read were positive though. Wheelers does not list these as a fitment on there website, but when I told them my year, make and model, they said they would fit. My main concerns when fitting aftermarket bump stops were two fold:

1. I did not want to over flex the axles and related components.

2. I did not want any tire rubbing on full compression.

I think my setup covers both concerns while also noticeably softening the harsh impact that I felt on full compression with just the OEM stops. I am aware that Wheelers also makes spacers to adjust these bumps, but with my current set up I find them un-necessary. Going forward I may even try a set of bump stops on the LCA in the rear position.*

After I mentioned this install in another thread I was PM'd about it by forum member JayM with a question:
Thanks for posting up your experience with the superbump. I ordered 1 set for my LX. What info did you find on running just the front set? Sounds like a logical approach leaving the rear factory for safety. Just wonder about the front of the control arm getting loaded more than the rear and causing issues down the road? Thoughts? Thanks, Jay .

To which I replied:

The front or rear arm would only be an issue if they were already weakened or you were jumping it or something. Having said that, the LCA's are a known weak point, which I already addressed with LCA brackets from Ironman.

My main purpose for all of my 'mods' so far was to address any real weaknesses in the vehicle. So that is why I put in a front TJM locker, a rear actuator guard by Slee, Ironman LCA brackets, Duratrac tires and Rancho RS9000XL adjustable shocks. I also have figured out by cross referencing the fitment guide from Timbren that the rear bump stops for the FJ cruiser from Wheelers should also fit!


My next move is to order a set of rear bump stops from Wheelers and see if they work just as well.*
Thanks for reading and happy wheeling.


*If there is anything contained in the text that is composed by me here or anywhere else on this forum that you do not like or disagree with, please consider the following:
1- If you think you know everything about suspension, off roading and Land Cruisers in general, you should go write a technical manual about it and/or get a job working for a major automotive manufacturer and leave the rest of us "know nothings" alone.
2- Unless an individual or company or entity etc has tried every single combination possible of suspension components on a Land Cruiser and documented the results, then you, I or anyone cannot say what is technically the best.
3- Feel free to make your own thread and invite the millions of people who agree that you know everything to join your seminar of Omnipotent knowledge and skill.
 
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Pictures or it didnt happen.
 
I ordered the same set . They are on backorder . ..damn. Should see them soon.

Spoke with Dan at Wheelers and he suggested I run them on the front and leave the rear stock. He thought running two sets would be pretty stiff on a stock truck.

My thoughts are this setup could be very progressive on our trucks. start with one set and add spacers for the kit to adjust ride and if you want more move to front and rear . Should be a good option for those with bumpers etc. to control compression and rebound on softer setups. Looking forward to getting them installed.
 
Good to know, I ordered some this weekend.
 
Curious about performance during slow crawling as well.
 
Curious about performance during slow crawling as well.

I went on a short off road excursion a couple days back and from behind the wheel it does not feel like it limited slow speed up-travel adversely. I was without my 9 year old assistant, so no real good pics. Funny thing about the Superbumps is that when you get them in your hand they are very soft. To the point where you wonder if they can perform their intended duty. I believe the reason they work so well is because they are relatively soft but also are like 5x taller than the OEM units and thereby contact the opposing contact point on almost any upward suspension movement. My LC100 is pretty level. Measuring from hub center to fender lip at all four corners is almost exactly 20.5 inches (DS rear is 20.75 for some reason). If I park it on level ground, there is only about 2 mm of gap between the stop and the contact point. Parked in my sloped driveway, the DS is at 1-2mm gap, PS is 3-4mm. Today if I can find a 'ramp' :). I will try to get a fully compressed picture and post it up.
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Does it matter at all that they are off center on the mount? Will that affect longevity?
 
If they are off center, cannot be by very much. The OEM bolt and the superbump bolt are the same diameter and fit fairly snug. Not much wiggle room to be off center. At least on my LC100.

Edit: I believe what you are seeing in the photo as 'off-center' is that the superbump is a lot bigger in diameter than the OEM stop. So it has a bigger footprint.
 
Just got shipping confirmation ! I will be putting these on a 06 LX with ahc 275/70/18. More to come.
 
Okay. That makes sense.


If they are off center, cannot be by very much. The OEM bolt and the superbump bolt are the same diameter and fit fairly snug. Not much wiggle room to be off center. At least on my LC100.

Edit: I believe what you are seeing in the photo as 'off-center' is that the superbump is a lot bigger in diameter than the OEM stop. So it has a bigger footprint.
 
Enlightenment needed: I have to suspect that the bumpstop got to affect the system suspension spring rate/damping during contact, thus performance has to be outside of what suspension engineers design.
 
Enlightenment needed: I have to suspect that the bumpstop got to affect the system suspension spring rate/damping during contact, thus performance has to be outside of what suspension engineers design.
If you're even thinking about installing these, you're already outside of the design envelope of what the suspension engineers designed...
 
Enlightenment needed: I have to suspect that the bump stop got to affect the system suspension spring rate/damping during contact, thus performance has to be outside of what suspension engineers design.
The reality is from the time you drive any car off the lot the car will gradually move away from the original specification or design. Due to wear, putting on different tires, different brake components etc. Anytime you change anything on your car, even if it is "OEM spec" will likely have at least a slightly different weight or size and thus effect ride, handling and wear characteristics. Keep in mind, I am talking down to grams and millimeters. Every little bit counts. So even if you are the type of person that will not "modify" your car, replace everything with 100% OEM spec parts and you have a vehicle with say 250k miles, your vehicle will drive a little different than when new.
 
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I went on a short off road excursion a couple days back and from behind the wheel it does not feel like it limited slow speed up-travel adversely. I was without my 9 year old assistant, so no real good pics. Funny thing about the Superbumps is that when you get them in your hand they are very soft. To the point where you wonder if they can perform their intended duty. I believe the reason they work so well is because they are relatively soft but also are like 5x taller than the OEM units and thereby contact the opposing contact point on almost any upward suspension movement. My LC100 is pretty level. Measuring from hub center to fender lip at all four corners is almost exactly 20.5 inches (DS rear is 20.75 for some reason). If I park it on level ground, there is only about 2 mm of gap between the stop and the contact point. Parked in my sloped driveway, the DS is at 1-2mm gap, PS is 3-4mm. Today if I can find a 'ramp' :). I will try to get a fully compressed picture and post it up.


Thank you for the detailed review and pics. I took my stock LC with 1 yr old OEM shocks to NY during Thanksgiving, and the big potholes and road imperfections were jarring. I probably could have avoid some of them, but we were busy trying to not get lost in the city. We seems to have a smoother road here locally, so this was never a big issue. This might be what I need to soften the hits.
 
Enlightenment needed: I have to suspect that the bumpstop got to affect the system suspension spring rate/damping during contact, thus performance has to be outside of what suspension engineers design.

I see it like this. The factory bumps are a harsher bottom out on the suspension . Using a larger softer bump contacts sooner and helps control the energy that is beyond the capacity of the torsion, shock combo. Yes it will put some more pressure in the control arm but it would be a progressive increase vs a static shock type load a factory bump. The fact that we are bottoming out seems like overdriving the suspension to me and I think controlling this force in a progressive manner is a better solution than the abrupt nature of the factory bumps. The SB will compress further than the factory bump will allow and is why I will keep the rear bump stock to prevent over compression. From all of my research this should be a very effective combo for over driving the front suspension.
 

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