Raising the diff

[Fraz]

Ok so the only way I can raise the diffs from the ground is with bigger tyres right... So my question is, how much do I need to go?

I have been recommended to buy 255/85's. This is a 33in tyre as opposed to my 29inch (235mm).

I would go 36ers if it would fit in my garage, but with current tyres I have a 3.9cm clearance above my roof when entering the garage. This is only about 1.5inches. Is this enough?

So, apart from obviously parking in the driveway, what are my options?
Sorry in advance of another tyre war...

Fraz

[long stroke]

Yeah, 255/85/16's seem like the go in a defer, if you go to say 35s you will possibly have to look at gearing correction in your diff's (4:11 diff ratio's)
But if you only have an inch or so of clearance in your garage, i don't think you will be able to fit 33's either;)
33's will roughly lift your whole car 2''s overall if you are running 29's now;)
You say you are running 235's now, are they 235/85/16's or something different?
If they are 235/85's they are closer to 32''s this size comes standard on most defer's i'm pretty shore;)
And in this case it will fit under your garage:)

CHEERS TIM.

[Fraz]

ok I just confused the hell out of myself. Doing so many comparisons using tyre size calculators I dont even know what im trying to achieve ;)

Your post got me thinking, and now having redone the maths, I actually have 31.72in tyres, not 29.

So yes, I do have 32inchers, and increasing the width to 255 will bring it up to 33.06inches. Im not sure why, but thats what the calculator says.

Would you recommend going to a 255/90? That brings it to 34.07inches.
The garage door might be modifiable... ;)
Would I need a diff correction?

Thanks mate

Fraz

[Blknight.aus]

metric tyre sizes are your tread width and then your side wall ratio (expressed as a percentage).

so a tyre thats got a 200/50 profile will be 200 mm across the tread face and the side wall height will be 100mm

this is then followed up with the rim diameter for mounting then any specialist markings.

so 16 LT is a 16 inch rim size in light truck construction. (which is about the most common.

you used to get tyres with an R prefix but this has mainly been dropped all it means is that your tyre has a radial construction.

the full write up for the imaginary tyre I just invented for the example would read

200/50 16LT or
200/50 R 16 LT

if you increase either number you wind up with a taller tyre. one thing to be carefull of is that some tyre manufacturers list the sidewall height measured from the top layer of the tyre carcass (the last bit of banding before the tread face and blocks are applied) and others to the top of the tread after the manufacture process.

[abaddonxi]

Need more diff clearance?

Have you considered a Brazilian?
http://www.aulro.com/afvb/good-oil/56982-diff-thread-lockers-breathers-shaving-removing.html#post781177

Should get you an extra 3/4 inch where it counts, and still get into the garage.

[Psimpson7]

Would you recommend going to a 255/90? That brings it to 34.07inches.

Fraz

No such size in metric. I think 85% is generally regarded to be full height, so if you see a tyre, such as 205r16 it will be @85% sidewall height by default.

255/85 are about the best bet if you dont want to start changing stuff too much.

You can run them, ,albeit with rubbing, at the standard ride height.

[Aussie Mudrat]

Remember seeing reduction hubs (Unimog style) for Landy's on some website recently, not sure if they'd be legal for road use but they'll definitely give you diff clearance

[DeeJay]

You can get about 1.5" lower to get in the garage if you let the tyres down. OK if you put it away for a time, PIA otherwise.

[Fraz]

Thanks guys - Ill start pricing some 255/85's

Any particular make (without trying to start a brand war)
As I said I have BF AT's now - just wondering what others have fun with.

Is an MT worth much more? Do they wear quicker?

Cheers