32's still rub with Ulti Lift

[hcr83]

Hey gents,

I gota a set of 32's on my rig yesterday and even with the Ultimate sussy lift they still rub (only very slightly) on the mudguard when full lock. Would this be normal??

Going by what everyone says on this forum I thort they would clear no problems.

Anyway no too worried because it looks so much better

look forward to any answers on this.

Cheers

[FredSmith]

You will probably have to fit wheel spacers. Have a look on fleabay. Make sure you do some measurements of thickness required. I think the PCD of the rims is 139.7 mm, 6 stud. Also if you do this will the tires extend outside the guards?

[macca002]

What rims are you running? The offset must be different than stock 16/17's as I am running 32's on the stock rims and still have plenty of room.

[Cowboy Dave]

And please don't fit wheel spacers.

[Tony81]

What rims are you running? The offset must be different than stock 16/17's as I am running 32's on the stock rims and still have plenty of room.

X2 no problems at all.

[hcr83]

The rims are 18" - Tyres are 275/65/R18

the offset wouldn't make any difference I wouldn't think??

it hits mudflap so the tyre needs to go forward not outward...

I stand to be corrected tho.

[borngeek]

Start here. viewtopic.php?f=36&t=8337

[hcr83]

Hey borngeek - I did look at this thread however I cant make head nor tail of it

[Homer]

Your offset is wrong. When that happens it hits the back inside (or outside) corner of your mudflap on full lock.

[Sootie]

And please don't fit wheel spacers.

+1

and I know thats a useless forum post so here is something about offsets


http://www.worldoneperformance.com/blog ... sets-work/

[Cowboy Dave]

Yeah sorry if my post was a bit brief, but I was on a phone in the car. Wheel spacers are bad news. Illegal and dangerous as I understand it. This is different to a hub spacer which fills in the space where your centre hole is the wrong size. On the wheel spacers I am aware of a case in Sydney where an imported vehicle lost its wheel due to use of an alloy spacer and it almost killed a kid waiting for a bus.

[hcr83]

Mate i'm

I am pretty thick tho

Doesn't an offset mean the in and out - so if it was offset 20mm for arguments sake wouldn't the wheel just hit 20mm further in or out????

SORRY im hopeless

[borngeek]

Yes offset is in and out. This still affects the range in which the wheel is operational when turning left and right.

If you move a object in and turn it left and right it has a different path to before. Just try it with a ruler on a table with some chalk. You will see what I mean. Clearly the offset you have makes it within range of the mud flap.

This is not really much of a issue, you can trim the mud flap (or remove it).

Like others have said do not use a spacer as they are dangerous and in your case unnecessary, as you can work around the issue.

hope that helps.

[hcr83]

Thanks Bud!!

I will let the tyre make its own track

like I say its only juuust rubbing

[NowForThe5th]

This drawing will help to explain offset, which is the amount by which the face of the wheel that contacts the hub is moved in or out from the centre of the rim.

offset.jpg

Now, if you look at the diagram where the offset is positive you can imagine that the the wheel rotates, when steering, around the point at which it contacts the hub - it doesn't, but just for this exercise, we'll say that it does. You'll see that the back of the wheel describes a bigger arc (because it is further away) than would be the case where the offset is negative.

So, if the back of your tyre is contacting the mudflap or a part of the body you need to move the offset in, that is make it less positive. For example, if it's now +40, maybe +20 would work better. Conversely, if the front of the tyre (front meaning outside) contacts, then you need a wheel which has more positive offset.

[snowman]

i'll almost bet he has too much negative offset already (which is what a wheel spacer will do).

As we run 38mm positive offset and most wheels are far less than this (towards neutral or negative) that this has pushed his wheel too far outboard and why it's arc is now contacting the wheel arch. compounded by the 275mm wide tyre.

most people running 33's 'just' rub as well.

you need to find the spec on your rim.

there is probably very little you can do about it apart from trimming the mudflap area like many have had to do with 33's without changing your rims.

[snowman]

offset.jpg

what this diagram fails to identify well is the outside face of the wheel.

on these diagrams the part of the wheel you could see from looking at it on the car is the right hand side of the diagram in each section.

our cars run a lot of the brake assembly within the wheel itself (large positive offset), unlike some old falcons etc that use to have 'deep dish' wheels which were effectively big negative offset.

[Homer]

He will be zero offset.

Do your tyres stick out close to the guards? Looks good like that though

[hcr83]

This drawing will help to explain offset, which is the amount by which the face of the wheel that contacts the hub is moved in or out from the centre of the rim.

offset.jpg

i think my offset is negative cos my rims look more like the pic on the right

[hcr83]

Also rather then start another thread can someone tell me how much gap should be under the top front bump stop....mine is only about 5-8mm how does this allow any downward travel????

[hcr83]

Sorry correction

i was looking at the picture wrong - DUH!

My rim is definately a zero or maybe a small positive. Does this make sense why it would rub??

[ag9111]

The rims will have an ET No on the back. That is your offset

[hcr83]

Also rather then start another thread can someone tell me how much gap should be under the top front bump stop....mine is only about 5-8mm how does this allow any downward travel????

Bump

[NowForThe5th]

Also rather then start another thread can someone tell me how much gap should be under the top front bump stop....mine is only about 5-8mm how does this allow any downward travel????

Bump

No definitive answer for this hcr - it varies from vehicle to vehicle. With a lift it doesn't sound too wrong though. Remember that your wheel is further out than the bump stop so will traverse a greater distance and you also have the compression of the rubber itself, as well. It's a limiting factor on IFS vehicles, but still works quite well.

[Spearsyjr]

Would my stock 17x7.5 rims fit 32s good without a lift? i plan on a 2'' lift sometime but i would like to get before and after photos with the new tyres on. I cant afford to the tyres and lift all at once