34's on stock setup - it's done, now some advice...

[Willy beamin]

I ordered mine through Slee and attached is the link to the kit I went with per Christos suggestion - there's a front and rear to answer your inquiry. If you have questions I suggest you give the Slee guys a call for further info. Remember the benefit to these is when you're traveling at speed and your suspension cycles upward these will slow down / absorb your up travel so the tire doesn't destroy your wheel well, liners or other objects in its path. Plus with hauling your trailer these can be a nice secondary support for your suspension should you be overloaded
Timbren

I had to trim the rear baseplate that the timbrens mount to and came with because the plate was wide and would get in contact with my rear springs during compression. So if you decide to go with this system and install these just keep that in mind and be on the look out. Maybe my truck was set up different or who knows point is its not a big deal and is an easy fix with a cut off wheel and some spray paint. good luck

 

[linuxgod]

I ordered mine through Slee and attached is the link to the kit I went with per Christos suggestion - there's a front and rear to answer your inquiry.

I'll ask Christo about the front. With airbags in the rear I can't use the stock rear stops - in order to install the air bags you actually cut off most of the rear bump stop, so the air bag (which is taller) has ~5psi in it all the time and partially acts as a bump stop and already limits up-travel. Unless the Timbrens are nearly as tall as the spring they won't help in the rear.

 

[Willy beamin]

the spring is taller for sure

 

[Taco2Cruiser]

When I fit larger tires, I remove the coil over and then can freely test the entire movement of the wheel.

I really recommend that so you don't damage your sheet metal should the tire make contact.

Also, Timbren like bump stops do NOT extend your bump stops! I'm sorry to say this as I mean the utmost respect to everyone on this forums. But using a timbren like bump stop as a extended bump stop is a half assed way, and doesn't actually solve the problem. It will still compress to the same height as a stock bump stop under enough compression. And if you are delivering enough compression to do that, your are also hitting hard enough to let those tires do some really damage to your body.

6, six! Times I've had to cut inner fender aprons off of Modern Toyotas because of that misconception.

If you want to extend your bump stops to safely run larger tires, a solid spacer between the bump stop and the frame is the only way. Some thing that STOPS the compression, not just a firmer bumper stop, is what is needed.

 

[kreiten]

Ok, opinion time. I rolled the front of the truck up onto the curb, and then stacked every trailer leveling block I had on top of that. I should have measured, but the front right tire is probably ~18" off the ground.

Front right:
View attachment 1495152

Rear right:View attachment 1495153
Rear left:
View attachment 1495154

Rear left, close up shot:View attachment 1495155

It's gonna flex way more than that out of the trail!!! I'm not saying to run them or not run them man, but here's the math! I run a 285/70 R18 KM2 on a set of 18x9 with 20mm offset, damn near identical to what you are running I just have an additional 5mm of offset. Which in theory should make your setup more ideal than mine for clearing the fenders while flexin. I have a lift but no additional bump stops added so once I'm fully flexed I'm right back on the factory bump stops where you would be also! We have flexed the F outta this thing, jumped it, been offroad on more trails than I can count, crawling, high speed etc and have never hit the fender! I'm not saying what will happen on your exact setup, just simply giving ya the numbers buddy, hope that helps!

 

[kreiten]

 

[linuxgod]

Thanks @Taco2Cruiser, good to know.

 

[linuxgod]

It's gonna flex way more than that out of the trail!!! I'm not saying to run them or not run them man, but here's the math! I run a 285/70 R18 KM2 on a set of 18x9 with 20mm offset, damn near identical to what you are running I just have an additional 5mm of offset. Which in theory should make your setup more ideal than mine for clearing the fenders while flexin. I have a lift but no additional bump stops added so once I'm fully flexed I'm right back on the factory bump stops where you would be also! We have flexed the F outta this thing, jumped it, been offroad on more trails than I can count, crawling, high speed etc and have never hit the fender! I'm not saying what will happen on your exact setup, just simply giving ya the numbers buddy, hope that helps!

Yeah I have to admit Kreiten, I tried to duplicate much of your setup. By spec my tires are 0.1" taller and the wheels tucked 0.2" more inward, so yeah basically the same (which admittedly is why I tried this setup). Wondering how much you would have rubbed in the above photo without your lift (or in my case with ~1/2" to 3/4" lift in the front from the Toyota spring spacers).

(Yeah ok guys so I should probably just bite the damn bullet and lift it already)

 

[Willy beamin]

Timbrens are fine for most everyone on this forum and what we really do with these rigs - I have racked up over 60,000 miles and thrown everything I want at them without failure or regret. now if you are more adventurous then me you may need to go a different route. but to answer your question these work well with bigger tires then what you have.

 

[TonyP]

You can also dial in compression on shocks to help lessen/alleviate hard hits resulting in hitting bump stops. This obviously won't help with slow stuff and it's only a bandaid fix.

 

[4gotalot]

Reading this last page or two has brought up a question about tire height and printed tire height.

What is the most accurate way to measure tire height? I have just leaned them against the wall with a straight edge that kind looks like our kitchen wall with the kids names. Mounted or not, pressure, load and or dia(3.14). To many variables. Each mfg prints something different for the same size, this I understand but there must be some kind of "standard" method other than the wall.

 

[Taco2Cruiser]

@Willy beamin and @TonyP bring up great points. And I'm all about getting wild on pushing the limits. I've already decided that should I have an expensive KDSS failure, I'm SASing and running 40s.

I'm not saying a timbren isn't a good bump stop (I greatly prefer Wheelers over timbren, much softer and smaller to not hit the coil over) and you can increase shock pressure to minimize bottoming out. But that's not what I'm trying to focus on.

But at the end of the day, a lift, a stiff bump stop, driving easy, is not what lets you fit a larger tire without any possible body collision issues. The bump stop is just that, a stop, a final last ditch effort to stop uptravel and save the shocks/body.

I think we need to acknowledge that fact when we recommended large tire sizes. If the uptravel is still stock, because we haven't seen anyone extend the front bump stops yet. Then whatever tire fits under it when stock is all that you can fit. If you can fit 35s and have the lower control arm pressed up to the factory bump stop/timbren at full squish and the tire won't hit the fender, then great. Que the Beyoncé music "If you like it then you should of put a 35 on it!"

I'm not really talking rubbing on the bumper, or control arms, or body mounts and sway bars. I'm talking larger tires that destroy the fenders when at full compression.

I just think it's a bad idea to say to that a stiff bump stop and a lift allows you to safely run a big tire. I think 285/75r17 are still safe for the clearance from when I had coils removed for testing a 295/70r17. But 35s, who knows, maybe, but there is only one way to know, that's to really test.

A solid build is one that does not have any possible issues at the end, no matter the situation. A learning/in progress build is one that it works... as long is you don't drive it too hard.

Imagine if Toyota said "the rear end of our 200s offers great flex for most, but don't flex it too much because we didn't limit the axle enough and the spring could fall out." Maybe this is where @gaijin and I are closer in thought. If your going to do it, do it right.

 

[TonyP]

There's something to be said about a rock solid, reliable, hassle free setup. That's what most of us strive for. It's the best of all worlds. Driving down a trail and knowing you won't have any issues is worth far more than any tire/suspension setup can provide. Conversely, there is the few of us that enjoy pushing limits and trying different routes.

Neither strategies are wrong, so as long as you have realistic expectations and know what you're getting into.

The issue will come when you arrive at Breck and see all the cool rigs on this forum and start pricing out your next mod that you didn't know you wanted. At least I can definitely see that happening to me

 

[Taco2Cruiser]

There's something to be said about a rock solid, reliable, hassle free setup. That's what most of us strive for. It's the best of all worlds. Driving down a trail and knowing you won't have any issues is worth far more than any tire/suspension setup can provide. Conversely, there is the few of us that enjoy pushing limits and trying different routes.

Neither strategies are wrong, so as long as you have realistic expectations and know what you're getting into.

The issue will come when you arrive at Breck and see all the cool rigs on this forum and start pricing out your next mod that you didn't know you wanted. At least I can definitely see that happening to me

So agree, and I'm not saying trying things is bad. Hell, I'm the epidomy of "well, that didn't work."

And experience is that thing you get right after you need it.

This forum is great, we all are helping each other, learning from others mistake, even though we have some "dynamic discussions" along the way.

I learned the hard way about tire sizes, lifting, and clearances many moons ago. Spending over 100k on cars and everything I have been able to do to them over the years and tens of thousands of hours working on and repairing them.

I just don't what someone to think they are good, for even years, then comes one bump too hard, and 8k of damage.

Ok I'm done, you guys are awesome.

 

[Markuson]

FWIW...no bumps were added to my rears. I do want to fully test and reduce front bumps to the extent possible.

At 34", my "35’s" are only slightly taller than the 285/75/17...so I think with some careful tweaking, I'll get to almost full stuff, if not full.

 

[TonyP]

Spending over 100k on cars and everything I have been able to do to them over the years and tens of thousands of hours working on and repairing them.

Ugh, you and me both. Those damn kids giving me a ride in their Skyline GTS-T at my first assignment (Okinawa) put a permanent hole in my bank account for automotive stuffs for the past 16 years. I should have joined the Navy or something so instead of cars I'd learn how to do my nails or whatever they do on the boat for months on end.

 

[linuxgod]

25mph over some semi-gradual-type speed bumps this evening. The front dives pretty far (not sure if it hits the bump stops) but I took it fast enough the rear end bounced off the ground. No rubbing or noises. If I'm taking anything as fast as I did tonight I need to slow the **** down.

That said, Jason at Trail Tailor hooked me up, and the 45mm Tough Dog lift is now in the works within the next 3 weeks. Now to order some UCAs and taller firestone airbags...

 

[Willy beamin]

Atta boy

 

[Markuson]

There ya go.

 

[ikeb]

25mph over some semi-gradual-type speed bumps this evening. The front dives pretty far (not sure if it hits the bump stops) but I took it fast enough the rear end bounced off the ground. No rubbing or noises. If I'm taking anything as fast as I did tonight I need to slow the **** down.

That said, Jason at Trail Tailor hooked me up, and the 45mm Tough Dog lift is now in the works within the next 3 weeks. Now to order some UCAs and taller firestone airbags...