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Old 10-05-2021, 01:12 AM #16
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Personally, I didn't give it enough thought, saw a sale and pressed Buy Now. I read the blurbs on both Opt-in and Duro Bumps' sites and went with what appeared the written guidance - shorter set for stock up to 2" and taller set for 2" and above. Not knowing what the future may hold, I went with the longer set. When I popped the rears in I also noticed the greatly reduced distance to the axle. The fronts didn't concern me. When I was out on some trails a couple weeks ago, I had a look under there at what seemed like full stuff and while the bump stop was super compressed and bulging, it didn't seem like the tire had much further to go up in the wheel well, anyway. Right now I'm not feeling like they are really that much of a travel-limiter with 5100s and 906s. It might not be the optimal setup, but I don't think it's horrible at this point. I have a lot more to learn and will take a closer look at the local OHV park on their obstacle courses soon....
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Old 10-05-2021, 09:22 AM #17
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Quote:
Originally Posted by Romeo1 View Post
So, I guess I’ll ask it here. Are there any contact issues with the shorter durobump on a 2” suspension lift with 2906 springs and 5160 Bilsteins? I wouldn’t mind moar articulation.
EDIT: We're running different shocks (5100 vs 5160), so it won't be a perfect comparison to your setup, but it will be close.

I’ll update this thread once I’ve got everything buttoned up and I’m able to test it out.
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Old 10-06-2021, 10:07 AM #18
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EDIT: We're running different shocks (5100 vs 5160), so it won't be a perfect comparison to your setup, but it will be close.

I’ll update this thread once I’ve got everything buttoned up and I’m able to test it out.

I wonder if by going to the shorter bumps on a lifted setup if it could create a situation where the flex causes the drooped side to get the springs really loose? That would make sense.
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Old 10-06-2021, 10:19 AM #19
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Quote:
Originally Posted by Romeo1 View Post
I wonder if by going to the shorter bumps on a lifted setup if it could create a situation where the flex causes the drooped side to get the springs really loose? That would make sense.
That shouldn't happen if you are using the correct shocks for your springs. The extended length of the shock will (should) limit the droop of the axle during flex and should prevent the axle from over extending and losing the spring.
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Old 10-11-2021, 10:41 PM #20
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Figured I’d do a quick update:
Installed the stock length durobumps on Thursday, just did a flex test real quick cause someone is coming to buy my 5.25’s tonight. Here’s the results.

Springs removed and full weight of vehicle on the bumpstops still have about 1” shock travel left on passenger and 3/4” on driver. If I notice it seems like it’s bottoming out which I don’t think it will I can just make some small 1/4”-1/2” spacers for the bumpstops.





Amazingly the 35’s don’t rub at all at full compression either. Although I have my rear upper control arms adjusted for my pinion angle.
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Old 10-12-2021, 04:54 PM #21
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Quote:
Originally Posted by T4topher View Post
Amazingly the 35’s don’t rub at all at full compression either. Although I have my rear upper control arms adjusted for my pinion angle.
Looks good! You may want to check the clearance of the tires with flexing too, since the wheel on the 'high' side of a flex can move up farther than it does with flat compression.

-Charlie
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Old 10-12-2021, 06:05 PM #22
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Looks good! You may want to check the clearance of the tires with flexing too, since the wheel on the 'high' side of a flex can move up farther than it does with flat compression.

-Charlie
Thought about doing that right after I put the springs back in, lol.. Would be so much easier if I could use a forklift.. Not too worried though as it looked like there was a decent amount of room all around the tire except towards the front where it was only like 1/4”. If it rubs I’ll trim it as needed.
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Old 12-01-2021, 02:11 PM #23
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Update: installed the 3.5” DuroBumps. I haven’t really tested them yet but they look like they’ll be perfect for my application.

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Old 12-01-2021, 10:52 PM #24
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Be interesting to see what happens.
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Old 12-06-2021, 02:30 PM #25
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Also curious as well... My current temporary LC shocks are too firm for me to even touch the bumps now that I've fixed my sway bar links...so I really have no idea what hitting them feels like sadly... The bumps that is.

Do they hit soft or hard?
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Old 12-06-2021, 09:22 PM #26
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Also curious as well... My current temporary LC shocks are too firm for me to even touch the bumps now that I've fixed my sway bar links...so I really have no idea what hitting them feels like sadly... The bumps that is.

Do they hit soft or hard?

They feel fairly soft unless you hit something extremely hard and fast. Even then, it still feels like pillows relative to the factory bump setup.

Go articulate it out and you’ll be able to feel it. It’s a gentle contact that kind of continues progressively for a ways on mine.
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Old 12-06-2021, 09:31 PM #27
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DuroBumps 5.25” VS 3.5" bump stops for 2" lift ?

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Do they hit soft or hard?
Soft (at first) like @Romeo1 said, and then they firm up. This is by design with the progressive rated rubber used. I can squish the lowest part of them with my finger.
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Old 12-06-2021, 09:57 PM #28
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They feel fairly soft unless you hit something extremely hard and fast. Even then, it still feels like pillows relative to the factory bump setup.

Go articulate it out and you’ll be able to feel it. It’s a gentle contact that kind of continues progressively for a ways on mine.
Haha... Yeah there's absolutely no way to simulate that with Land cruiser shocks on the rear. Things are wayyyy too stiff...lol.

See years ago when I had tundra shocks in the rear I also had rear sway bar links that were too long but I did not know it at the time... They kept hitting the lower arms which I took as the bumps being very hard...

So now here I am with shorter links but the Land cruiser shocks are too damn stiff... I'm using them temporarily until my Kings get back from a revalve

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Soft (at first) like @Romeo1 said, and then they firm up. This is by design with the progressive rated rubber used. I can squish the lowest part of them with my finger.
Really? Well hopefully I'll get the test that out when my Kings get back
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