Fitting 33'' tyre thread.

[hendoshane]

Cheers

[EASTCOAST]

Do we all still agree that a 0 offset is the best offset to have with 33's ?????????????????

[KTM525EXC]

Do we all still agree that a 0 offset is the best offset to have with 33's ?????????????????

depends on the width of the 33

[Hilux Max]

Exactly what KTM said.

Ideally I think if your gonna run a 285 a 16x8 wheel with a +10 offset with the factory upper control arms would be ideal.

Patrol wheels are a 16x8 with +10 offset.

when I bought my sunnies I asked them for the sunraysia wheel to suit a patrol but they said it wouldnt fit because of the design of the wheel center and the brake calipers on the hilux.

But I beleive factory patrol 16x8's steel wheels do fit.

you'll fit a 33/10.5x15 KM2 on standard SR5 rims...check out DLUX's shed for details.

zero offset is the most easily and readily available which is why most of us have opted for this.

[scottsr20]

The thing I don't get is if you have full travel with your 33s on the right offset rims , what does it matter what your ride height is ? As far as I understand , if it doesn't scrub when articulating , then it shouldn't matter - you should be able to drive at standard height . Am I missing something ?

[Hilux Max]

The thing I don't get is if you have full travel with your 33s on the right offset rims , what does it matter what your ride height is ? As far as I understand , if it doesn't scrub when articulating , then it shouldn't matter - you should be able to drive at standard height . Am I missing something ?

At standard height your front struts are stock height....they wont articulate/travel the same distance as a lifted hilux will because the lifted hilux has longer strut fitted.

Most lifted suspensions are stiffer and wont allow the suspension to compress as much as a standard hilux suspension will...this helps in keeping the 33" tyres off the guards.

If they do compress alot, then the 33" tyre will hit the flare on full compression. And most likely depending on the tyre will clip the bodymount with the wheels turned....

Ther is no point in making 33" tyres fit for only driving on the street and the wheel in the straight ahead position. If your gonna fit 33" tyres, you have to make sure that there is clearance from everywhere with the wheels turned and the front suspension fully compressed at the same time.

I have some good reading posted up regarding tyre clearances and suspension travel in my Swaybar removal Thread linked here --> http://www.newhilux.net/phpbb/viewtopic.php?f=28&t=2971&hilit=sway+bar+removal

Here are some pics from it to help me explain this better....

Full suspension compression I refer to is when the lower control arm contacts the bump stop....not when the coilover cant compress anymore because its very stiff....



With the swaybar removed and the lower control arm in the position above this is how the tyre was sitting fully compressed in the guard -




And with the wheels turned in the following position -


The outer lugz of the tyre were contacting the bodymount -


Nothing mind you that trimming the bodymount cant fix, but even then it doesn avoid the fact that your tyre will hit the guard if you go over a smooth rise in the road that drops off suddenly, causing you to hit the guard with your tyre.

NOTE: Let me also mention here to those reading that removing the sway bar is not only technically illegal but it does also give you a good 1.5 " or so more uptravel.

I did this just to explain a worst case scenario.

An extra benefit of the swaybar being installed is that it also limits uptravel slightly which helps with bigger tyre.....

I fitted a 6mm thick wahser under the bumpstop which limits uptravel by double that, so 12mm.

This was enough to keep the tyre off the guard under full compression as you can see the pics below as I put the hilux in the same position to compress the front end fully -

6mm spacer fitted -


Lower control arm on the bump stop with 6mm spacer fitted -


Position of tyre against the body mount now after spacer fitted -


Position of tyre in the guard after spacer fitted with full compression -


I hope that helps understand things abit more....if you do manage to fit 285's on standard suspension you will get both less up and down travel due to the size of the factory strut. which means you will also lift wheel off the ground more, and factory suspension being softer, will not only wear ouit quicker(sagg) but you'll have more chance of the tyre hitting the guard on a hard landing causing damage.

With the right offset wheel, all the necessary trimming including the bodymount and not having flares, I honestly beleive you could successfully run a 34/10.5x16 tyre......there is "just" enough room to do this for thise adventurous enough.

[scottsr20]

Thanks for the indepth explaination Maxx , it does make it clearer . I'm not trying to run 285s at factory ride height , I'm looking at whether a body lift or UCAs are a better spend to get maximum articulation and clearance - It seems from reading everyone with 285s build ups that cutting the body mount may be neccessary with either depending on the tyre . I realise correct offset and wheel alignment helps with this... If you were to start again how would you go about it...

[Hilux Max]

Put it this way, its always better to go only as high as you have to for the tyre you want to run......

That being said......with aftermarket upper control arms....this gives you more room on the inner side of the tyre to run a less offset wheel than those of us that have factory upper control arms have to due to clearances issues with the factory UCA.

There is quite abit of romm on the inner side of the hilux guards that CAN be made use off but you need the aftermarket UCA's to benefit from it.

You'd be able to run (and this is going off what Ive read on Yank Tacoma and FJ Cruiser forums...same front ends) a 2.5" front lift and 285/75x17 (34.1x11.6x17 Toyo's) with aftermarket UCA's and a bodymount trim.

The reason many people dont do this is because aftermarket UCA's cost a hell of alot on top of everything else...if you can afford them, good, go for it.

Also, I dont beleive a bodylift of more than an inch is effective....yeah it looks good, but you still have that mount at the rear of the front guard, even if cut, you cant get away from it...its the limitation to tyre diameter.....inch bodylift will help the tyre clear the top of the guard under full suspension compression.

less offset equals smaller turning arc by having the wheel/tyre combo more tucked in and less prone to collecting that mount even if trimmed.

like I mentioned earlier...I honestly beleive that you can successfully run a full 34/10.5 tyre as long as you can get the width of the tyre to tuck inside the guard itself....to do this you need aftermarket UCA's and an offset wheel to suit.

just my opinion and what I have seen. others may disagree.

[scottsr20]

I was discussing this with Rod on the weekend while we were fitting my chip , and he told me his 265s 0n +20 offset could just kiss the swaybar on occasion , so ( once again dependant on which tyre ) I would think a +10 would be about the most a 285 could go in at full lock . Do your silverstones go close to the swaybar at full lock ?

[blownlux]

just to put it out there i just got mickey tompson 4 ribs 285/75/16 (about 33" tall) fitted on 16x8 with +20 offset (hang in 20mm from centre) and they fit well they slightly just under conpression touch the body mount bar at the back of the wheel arch and had to remove mud flaps, also have 2 inch lift but even compressed they dont touch much. I am very happy and i measured the tread and it is only 10mm less in width than my 33x12.5 inch tyres i have on my older hilux. I will be doing the upder bump stop mod though as mmaaxx mentioned.

[Hilux Max]

blownlux...id be interested to know how close the tyre is at full steering lock the closest to the factory upper control arm....I think the front end of the UCA is the closest side.

[blownlux]

at full lock there is about 5mm from upper controll arm

[blownlux]

Mmaxx just to add i did try a second hand tire before spending $350 each on mickey tompsons and it had only about 2 mm gap at full lock at the front of the controll arm but the mickeys have about 5mm slightly different shape to the tyre. I went with a +20 offset to try and stop the 33" tire hitting the back of the guard etc and while also keeping away from the controll arm. If you want some pics let me know and i can add some tomorrow.

[Hilux Max]

yeah that'd be great if you could add some pics, it'd help others here aswell.

Id be interested to see where on the tyre (sidewall) is the closest to the UCA for future reference if theres any more room to go taller with that offset.

Thing with Mickey Thompson tyres and Coopers, is they are the narrowest of all tyres in a particular size....for example, their 285's are stated as 11.3 wide which helps alot.....mine are 12 inches wide....most others are around 11.6/11.7 all this makes a difference when you have so little room to play with.

[Hilux Max]

Ive merged both threads about fitting 33" tyres together...since they cover the same issues.

So if you got any queries about fitting 33" tyres, continue on here please.

We'll keep it in the one thread.

[9W6VX]

Max,

Thanks for the housekeeping......

[blownlux]

[blownlux]

Hi every one, above are the pics i said i would put up sorry took so long been moving house.
These are 285/75/16 micheys 4 ribs on 8 inch rims with +20 offset. Iam very happy with this option. i do not have flares and just hang out a little. will get some flares soon, if any one has some cheep ones let me know.
car has 2inch lift. mut flaps removed. and that is about it. no rubbing under normal conditions.

[Hilux Max]

At full steering lock, theres no way that that tyre doesnt hit the Upper control arm...with it being that close with the wheels straight ahead, it only gets closer on the front side when at full lock.

looks good otherwise and as long as your happy with it.

[SerbLux]

Hey Max I am running a 3ich lift with 265/75/16 ATZ 4 rib with +25 off set rim and when doing hard core 4wding i notice a slight rib on my UCA so blownlux would have to rub with that set up. i have about the same clearance between my tyre and the UCA when wheels a straight.

Can you post some pics of UCA after you have done some real 4wding to kill all our curiousity blownlux??

If your set up does not touch I will change my rims and to run the bigger tyres and not have to do any trimming when I change my tyres early next year. Something like a +10 off set rim with those tyres would mean no trimming?

Ivan