I want to run a 245/40/18 on a 9inch for front and a 295/35/18 on a 11inch for rea on my fc any idea on offset. I don't care about the fenders and quarter panels I already planned on wide fenders front and rear. Any advice would be greatly appreciated.

 

Lol even gamers are into wheel fitment now... I must admit this looks pretty cool

 

So I'm running an 8" wheel, and I'm curious what size offset I would need to fit modded knuckles without hitting the LCA or anything.

 

You could run a zero and have about an inch of clearance with just the standard angle mod.

Modded knuckles, you'll have to see and order the right spacers

I took my setup out a few times this month and my wheels actually rubbed the powdercoat off the spring! Lol. Going to put a 5mm slip on up front soon. They've got them at advanced auto believe it or not for like $10 each!

 

My offset is currently +35. So getting to a 0 would be tough...

Anyone DD with modded knuckles?

 

stack bolt-on spacers. or buy different wheels

 

Hi all,

I have been reading this thread - got to 50 pages and found it fascinating to say the least. So much great info.

I have a thread in the 20B forum (doing an FC 20BT conversion) and I'm recording every step in the name of helping the next guy. I want to add a spreadsheet to show people some known good rear width and offset combinations. Making the spreadsheet was easy as pie, but what I'm not sure what the maximum safe backspace and frontspace is. For example; I know on the rear RETed has used 5.6" backspace (10.5"+9mm offset), which gives 5.9" frontspacing, but he theorised 5.84" backspace (using +15 offset on the same width) would be a safe max. Is that still the case?
I also have no idea how much frontspace is available (with/without rolled guards) on the FC. Dose anyone have this info (ie: max back/ frontspacing available on the rear of the standard FC?)

Many thanks for the help.

 

Clearance is heavily influenced by the size of tire you run, and other factors - the most we can do is give you measurements to ensure the wheel itself doesn't come in contact with any suspension components or body panels. There's really no 'concrete' max or min: only approximates.

 

Hiya and thanks for the reply!
Totally agree =) The finite max is the distance from the face of the hub to the point where something gets in the way - suspension side or fender side. Thankfully I'm only talking about the back here, but I very much hear what you're saying though. Different brand wheels and tires (which are the same size on paper) will of course always be different in practice.
I'm happy to use the max backspacing figure derived from RETed's post - as it's the biggest I've seen on a stock FC, but I might need to measure the frontspace by hand, then take 5 mil off that for the murphy factor.

What's the largest wheel / tire combo you've seen on an unmodified FC?

Cheers!

 

My definition of unmodified also includes rolling the fenders (not pulled), so:

Widest tire I've seen is on BlueTII's FC, he's running a 255/275 stagger. I'm also running the same 255/275 until I purchase new tires, during which I'll go with a square 255 all around. If you modify your rear trailing arms and use ingall camber bolts up front, you MIGHT be able to squeeze 285's in the rear and 265's in the front.

 

Hahaha - that's why I said unmodified =) But all good - I've rolled mine as well, only because the offset I'm starting with isn't ideal, is a bit close. Just talking about the rears (because I haven't done any calculations re the fronts - yet), I totally agree above 275 is a difficult process - nay on impossible - until someone does it =) What rear offset and wheel width were you running? 9, 9.5? 10's??

Just wondering, why go back to 255 all round - did you have handeling problems with the 275's?

Cheers and thanks =)

 

I'm running on 18x10 +25 (255/35/18) with unrolled fenders, was going to roll them, but decided i didn't have to. with rolling fenders and bending the mufflers heat shield a little, you could do 18x11 +24/+25, and id say 275/35/18

 

I'm running 17x9 +17 all around. I'm running a square tire setup because it's easier to sort out the handling without having to compensate for differing widths of tire. I can also rotate the tires to get the most use out of them.

 

i kno this has been covered alot but 184 pages!! lol i made it through 7....anyways....looking at getting some wheels....17x8 +35 all around with 225/50/17's all around...this work ok?

 

I'm looking at a set of 18" x 8.5" with a +30 offset. I am thinking about using a 245/40-18 tire to keep it in as close to spec diameter as I can. Will this work? if not, what would a recommended tire be?

 

No, you need 225 45s

 

That may be too tall in front. you might want to go with a 35 series tire.

 

with 45's it will be fine tho?

 

Why would it be too tall if this size retaines the same over all diameter as the stock 205/60-15s?

 

245/35/18 on the rear retains original diametre - 628.7mm. Stock is 205/60/15- 627mm.
Toyo make the 245/35/18 - not sure who else, but I'm sure they arent alone

 

Makes sense, thanks for the info.
When you had larger rears, what wheel and offset did you run? And that was with rolled fenders right?

Cheers!

 

What I am seeing is that:

205/60-15s = 627mm (stock)

235/35-18s = 621mm (This is a horrible size to use due to the fact that there are not very many choices to choose from and what there is is really expensive.

245/35-18s = 629mm (This closer to stock and has far more choices in tire and better prices.)

What I want to know is will those tires and the 18" x 8.5" offset +30 work with stock fenders or is there modification needed?

I could however use 225/40-18s, but this size is 10mm bigger in overall diameter bigger then stock size. I'm just no sure how well these will work with the 8.5" wide wheels. Also the prices here are even better then the 245/35-18s.

Suggestions please.

 

18x8.5 with +30 will fit without modifications. Has a backspace of 5.43" and a front space of 3.07" - it will be fairly flush also, should look nice. I'm not sure if 245 would be a better tire choice than 255 - I'd lean towards the 245/35 as it retains rolling diamtre. I certainly wouldn't go bigger than 255 on an 8.5 though =)

Are your rear fenders rolled? You get an extra 1/4 to 1/3" frontspaceif you do.

 

Work VS-XX 17"x8J ET22 front, 17"x9J ET22 rear. 215/45's front, 245/40's rear.
Tokico's with Tanabe springs, RB strutmounts in the front and stock camber settings (camber bolts front, TCsportline rear camber arm). Slight rubbing in the front when driving over speedbumps, should be fixed with a slight roll (or more negative camber).

 

You got a pic from the side? Just wondering how they look. Would appreciat it if you have one.

Cheers