Dobinsons 100 Series Suspension options - full breakdown

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I've found that amount of rake rides well on my Tacoma and the 100. That is ideal as far as my experience goes.

yeah I have turned the T bars once more since then because it was a lot of rake, but I'm also hoping the rears will settle a bit.
 
yeah I have turned the T bars once more since then because it was a lot of rake, but I'm also hoping the rears will settle a bit.
They will.
 
Does anyone have suggestions on where to go to have my Dobinsons IMS shocks recharged with Nitrogen in the DC/MD/VA area (I’ve cross posted in the Capital Cruisers clubhouse as well)? I missed the memo that it’s an annual maintenance item and my 100 rides like garbage.
Ive had no luck finding a shop with the appropriate lossless chuck for the flat style valves on them.

I’d prefer not to take the shocks out to ship them to Dobinsons for the refill, as I’m frustrated enough that I’d throw them away and buy another brand.
 
Has anyone tried a c59-309 on a 100?

Same spring rate as the c59-185 but a bit more height.

I’m currently running the C59-167 with 15mm spacer, airbags and IMS shocks. I’ve been considering going moving up to the 185 and maybe even 171. I’ll be adding a cruiser company rear eventually too.

I think the 171 will be way too stiff though. I’m thinking I could get rid of the spacers with the 309.
  • Suits Land Cruiser 80 Series and Lexus LX450
  • C59-309 4″ lift with 110-220lbs weight
  • 520/530mm free height, 20mm wire, 274LBF/in rate
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Has anyone tried a c59-309 on a 100?

Same spring rate as the c59-185 but a bit more height.

I’m currently running the C59-167 with 15mm spacer, airbags and IMS shocks. I’ve been considering going moving up to the 185 and maybe even 171. I’ll be adding a cruiser company rear eventually too.

I think the 171 will be way too stiff though. I’m thinking I could get rid of the spacers with the 309.
  • Suits Land Cruiser 80 Series and Lexus LX450
  • C59-309 4″ lift with 110-220lbs weight
  • 520/530mm free height, 20mm wire, 274LBF/in rate
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I would bet that would be sky high. I’ve got the 185s with a pretty heavy truck and sits pretty high as it is.
 
Since you don't have hardly any weight on it now, I wouldn't go with those. 80 series coils fit on a 100 series, but they don't lift as much because the 100 series is heavier.

The C59-167 is what I'd suggest. They'll be 2" with a 3rd row seat or light weight and 1.5" with the rear bumper. You can add rear spacers to boost the rear height later if/when you add the rear bumper, or change out the springs at that time. If you get 2.5" springs now to suit the weight, but you don't have the weight on there, you'll get like 3-4" of rear lift and it won't work out so well.


Hey Mike,

I'm wondering how much lift I'd be getting with your C59-175V coils. Is there a formula of some sort Dobinson's uses?
I have a Dissent rear bumper with a tire swingout + 35in spare, aluminum skids, rock sliders, steel TJM T17 front bumper + winch, no 3rd row seats.

How do the springs do paired with Dobinson's IMS shocks? I'm currently running Bilstein B8 5160 shocks and SOF2RH Slee Rear Coil Springs, which is too stiff and jarring for me, especially on the crappy Los Angeles streets, which have potholes, bumps, dips, and cracks everywhere.

Thanks,

Daniel
 
Hey Mike,

I'm wondering how much lift I'd be getting with your C59-175V coils. Is there a formula of some sort Dobinson's uses?
I have a Dissent rear bumper with a tire swingout + 35in spare, aluminum skids, rock sliders, steel TJM T17 front bumper + winch, no 3rd row seats.

How do the springs do paired with Dobinson's IMS shocks? I'm currently running Bilstein B8 5160 shocks and SOF2RH Slee Rear Coil Springs, which is too stiff and jarring for me, especially on the crappy Los Angeles streets, which have potholes, bumps, dips, and cracks everywhere.

Thanks,

Daniel
C59-175V give 2.5" of lift with 220lbs added on and behind the rear axle. Sounds like you're probably 300lbs with the bumper and tire on the back. So you'd probably be 2-2.25"

You add up how much constant added weight you've got, then choose a spring that suits that weight range and the lift height that you want.

I've never ran these springs myself, but they're not a very high spring rate, so they would ride quite comfortably, and the ride of the IMS shocks has proven to be very good on and offroad.
 
C59-175V give 2.5" of lift with 220lbs added on and behind the rear axle. Sounds like you're probably 300lbs with the bumper and tire on the back. So you'd probably be 2-2.25"

You add up how much constant added weight you've got, then choose a spring that suits that weight range and the lift height that you want.

I've never ran these springs myself, but they're not a very high spring rate, so they would ride quite comfortably, and the ride of the IMS shocks has proven to be very good on and offroad.
Great, thanks. So I'm leaning towards the extended travel shock. Will I need to extend my brake lines and add bump stops? Any other modifications I might need to make?
 
Great, thanks. So I'm leaning towards the extended travel shock. Will I need to extend my brake lines and add bump stops? Any other modifications I might need to make?
If you run longer rear shocks than I have listed in the first post, then yes, you'll need to extend brake lines and bump stops. You'll be trading up travel for down travel, so unless you're rock crawling the cruiser, it won't be very beneficial to add that extra down travel, and to limit the up travel.
 
I'm running a similar setup:
Dissent rear as you have it, rock sliders, no skids though.

The C59-167 I bought 1.5 years ago generally ride fine, but having the car empty it sits fairly level (so hanging down packed...). Debating at the moment whether to just use spacers, add an airbag or just the 175V...

Regarding the rear shocks: I chose the 3-way MRA (IMS front). This allows me to adjust between daily driver and loaded trips.
 
If you run longer rear shocks than I have listed in the first post, then yes, you'll need to extend brake lines and bump stops. You'll be trading up travel for down travel, so unless you're rock crawling the cruiser, it won't be very beneficial to add that extra down travel, and to limit the up travel.
Got it thanks!

You mentioned that the 175V’s are a softer spring… I’m now considering the 185’s. Thoughts? With a constant load of 350lbs behind the rear axle, what amount of lift am I looking at? Your website says 2in at 440lbs, but I’d be a tad lighter than that.
 
Got it thanks!

You mentioned that the 175V’s are a softer spring… I’m now considering the 185’s. Thoughts? With a constant load of 350lbs behind the rear axle, what amount of lift am I looking at? Your website says 2in at 440lbs, but I’d be a tad lighter than that.
Not my site. My site says this:

  • 100 Series and Lexus LX470 (1998-2007) – Dobinsons C59-185 – 1.5″ lift, linear rate, with 440LBS constant rear weight
Same info as on the first post of this whole thread.

With less weight than listed, you'll get more lift.
 
Not my site. My site says this:

  • 100 Series and Lexus LX470 (1998-2007) – Dobinsons C59-185 – 1.5″ lift, linear rate, with 440LBS constant rear weight
Same info as on the first post of this whole thread.

With less weight than listed, you'll get more lift.
Interesting. Why the discrepancy? Any way you can estimate how much lift I’ll have with the C59-185’s given 350lbs of constant weight? Seems like there should be some sort of formula to figure this out so we don’t have to bother and ask.
 
Just swapped c59-185s in to replace the c59-167s. The c59-167s were perfect before when I was more stock.

C59-167 - 2" lift with stock weight inc 3rd row seat, 1.5" lift with 150-220LBS constant rear weight, linear rate (485/495mm free height, 227LB rate)
C59-185 - 1.5" lift, linear rate, with 440LBS constant rear weight (480/490mm free height, 277LB rate)

Also have Dobinsons 15mm spacers.

Right after the 185s were installed:
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With the 167s:
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In both sets of pics the rear has a fridge, fridge slide, rear drawers full with some stuff but not a bunch of heavy tools/spares. I have Firestone air bags for when it’s fully loaded if necessary. No air in either set of pics.
 
Long time lurker here, love all the information on this forum. I just installed Dobinsons MRR shocks on all 4 corners (thanks ExitOffRoad for the Black Friday sale) and I am having a heck of a time finding the correct position for the remote reservoir in the rear with the piggy back mount and I cannot find any images of where people have mounted these on the LX470/LC100

If I mount it following the LC105 instructions, I am fairly confident it will contact the LCA and Sway Bar. I currently have it mounted near the top of the shock body, facing the driveshaft, parallel with the spring. This gives me 7 1/2" of travel before the LCA could contact the reservoir, but measuring axle to bump stop is also 7 1/2" which concerns me that I could potentially make contact with the reservoir at full stuff. Anyone have pictures of their setup?

I will be trying to find some ditches and loading docks to test it out on, but wanted to see other's setup as well.
TIA
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Long time lurker here, love all the information on this forum. I just installed Dobinsons MRR shocks on all 4 corners (thanks ExitOffRoad for the Black Friday sale) and I am having a heck of a time finding the correct position for the remote reservoir in the rear with the piggy back mount and I cannot find any images of where people have mounted these on the LX470/LC100

If I mount it following the LC105 instructions, I am fairly confident it will contact the LCA and Sway Bar. I currently have it mounted near the top of the shock body, facing the driveshaft, parallel with the spring. This gives me 7 1/2" of travel before the LCA could contact the reservoir, but measuring axle to bump stop is also 7 1/2" which concerns me that I could potentially make contact with the reservoir at full stuff. Anyone have pictures of their setup?

I will be trying to find some ditches and loading docks to test it out on, but wanted to see other's setup as well.
TIAView attachment 4041205View attachment 4041206View attachment 4041205View attachment 4041206
I looked and I don't have any other installed photos saved. I would still recommend the 105 series position from the instructions.

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Ultimately the best option is to go and flex it out and move the resi in a location at full stuff that it isn't touching anything, and it will be safe there for the rest of the time.
 
Hey Guys, since the thread has years of people's experience with the Dobinsons parts now, can we get some longer-term measurements for rear lift heights? (Since front height is adjustable and based on where the TB's are set to). Measuring from the center of the hub to fender edge, what rear coils are you running, how much added weight, and what's your measurement?

Something like this as an example:
Coils: C59-169
Hub to Fender: 22.5"
Added weight: Just 3rd row seats
 
Purchased in April 2021
Coils - C59-185
(Shocks) - Dobisons GS59-682
Hub to Fender - 23 / 23.5"
Weight - Detailed below

This setup was advertised to handle a 400lb additional constant load over stock and provide a 1.5" lift for the 100 series. For me its providing more like a 3" lift.. Its a solid product all around and hasn't sagged at all over 5 years. Shocks are doing good too..... but I believe it requires more weight to get the 185's sitting at 1-2" lift..... what do you think?


I haven't done the math in a while but maybe now is a good time to do it:
- Rear bumper - 150lbs
- Swing outs - 50lbs each x 2 = 100lbs total
- 15 gallons of fuel on 1 side - 90lbs
- Spare tire on the other side ( Not really adding weight? Just moving it from under vehicle ) - 80 lbs?
---- Total on bumper - 420lbs ---

  • All seats have been removed. But replaced with a sleeper platform and drawer. So In my mind that just cancels itself out
  • The gear I carry isn't too heavy, maybe adds up to 200-300lbs and its spread all around the vehicle
  • My roof has a rack and it holds 8 gallons of water and traction boards so that should be considered

Vehicle weight fully loaded. I'd be curious how this rear weight compares to a stock 100's rear weight. Maybe I'm not 400lbs over stock?
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