Speedworks

I've bought myself some tires at a very good price, but I need some wheels. settigns anyway, because I got my eye on a set already


Tires are Dunlop Sp9000 235/35/19 and 265/30/19

I'm thinking of a 8X19 and 9X19 combo (but the 235 will be quite wide for a 8" in the front

or 8.5X19 and 9.5X19 combo.

What offets do I use? 38 for the rear and 40/42 in the front?

thanks for your help

Section8

iTrader: (6)

Wow 19" wheels on an FD? That's huge.

oneflytrini

iTrader: (1)

I had 18's on my FD, and it didnt feel as "nimble" as with the stockers on. I sold the 18's and put the stockers back on, and I am happy as ever. 19's are pretty big, they look nice, but can create alot of problems (rubbing, weight, etc.) compared to 16's and 17's. 17's are the ideal choice .

ALI

Speedworks

the car is a weekend driver, and certainly no track car.
To be honest I'll use it to promote my shop.

There's another FD here in belgium with 19's with thesame measures for tires but his offset is fairly narrow, so the wheels are very deep in the wheelarches.

dclin

iTrader: (4)

The numbers you quoted will work fine. (19x8 +40 or +42 front, 19x9 +38 rear) An 8" wheel should be within a 235/35/19's manufacturer width range, and should be ok. The same offsets will work for the 19x8.5/19x9.5 combo as well, but just 'move' the 'face' of the wheel outboard another 1/4". I'm assuming your limited in your choice of offset/wheel width combos.

You might also consider a symmetrical fitment, say 265/30/19 all four corners on 19x9 +45ish. The Dunlop SP9000 265/30/19's are 25.3" diameter IIRC.

Speedworks

These are the wheels I'm looking for

http://www.dvr.be/wheels/evox/rm4.html

Gunmetal or black centre. The car will be repainted in Titanium silver with black roof so a Black centre is my first option.

265 in all corners would some sight but even with power steering not so easy I guess.

What do you mean with "moving 1.4 outboard"?

dclin

iTrader: (4)

I've had 265/35/18s up front, didn't seem to be any more effort to turn then the 235/40/18 or 255/35/18s I had on there. I also put my 285/30/18s from the back onto the front, just for grins once, and that was not too bad either. This with ps though.

For the same given offsets but different width wheels, the extra width is divided on either side of the wheel. A common misconception is that a whatever x 8" +40 wheel sits the same as a whatever x 10" +40 wheel. In this example, if you were to mount these two different width wheels (but same offset), the whatever x 10" +40 wheel would stick out 1" more on either side then the whatever x 8" +40 wheel.

In the case of the wheels you quoted above, the 1/2" wider wheels would actually add 1/4" on each side compared to the narrower wheel.

That's why you can not talk about offsets without mentioning what specific wheel width.

I really should have said 1/4" added to both sides, but I know from experience that you're closer to the edge on the outside then on the inside (by your suspension bits). Still plenty of room on both sides though, so no worries. Either set will fit fine.

dclin

iTrader: (4)

The only thing I'd might have a tiny bit of concern though, is that your 235/35/19 Dunlop SP9000s are 25.5" diameter. Tiny bit tall, but rolling your fender lip should help prevent the fender lip getting pulled out. That, and BE VERY CAREFUL when turning onto a inclined driveway. The SP9000s have a rounded profile (lower shoulders), so this might help. I've got 245/30/19 SP9000s myself (24.8" diameter), though have not mounted them yet.

Speedworks

owkee I'm getting the picture. So it would be more advisable to use a 42 offset with the 9.5 in the back and a 40 offset with a 9"

Just because the higher the offset number the "narrower" the centre piece of the wheel (where the weel comes against the brake disc)

Fenders will be rolled if necessary as the car will get a new colour

Speedworks

owkee I'm getting the picture. So it would be more advisable to use a 42 offset with the 9.5 in the back and a 40 offset with a 9"

Just because the higher the offset number the "narrower" the centre piece of the wheel (where the weel comes against the brake disc)

Fenders will be rolled if necessary as the car will get a new colour

Speedworks

ohw.. something extra. I still have my Ap Racing front brakes lying around (Stillen Motorsport/RX7store)
These are 330mm rotors

They will be fitted in the future after I have the caliper adaptors machined and the centres for the discs.

I Don't think it has any effect on the offset values as the
Thickness of the Ap disc adaptor will be thesame as the OEM disc thickness

ptrhahn

iTrader: (9)

If I were you, i'd look to run the lightest wheels possible to offset the 19" penalty. Volk CE28N's are now available in 19x8.5 and 19x9.5 sizes that will work best for you as they are about as light as it gets.... and they are available in decent colors like silver, bronze, gunmetal, and my fave mercury silver.

JimLab also got 19" TE37's which would be a good choice as well.

They should both clear about any brake setup you have.

dclin

iTrader: (4)

If you were short on room, that's basically the direction you want to go. In this case, there is still room, and 9.5 +40 would work if you really wanted to use it. I think you get the idea though.


As for the brakes, offsets usually don't have much bearing on caliper clearance in real life. Generally (at least on more expensive wheels), caliper clearance is deteremined by 'disk or pad height' (or any number of other terms I've heard).

More on this in my second to last post here:

https://www.rx7club.com/showthread.p...ght=pad+height

This illustrates the different 'pad heights':

http://www.work-wheels.co.jp/wheels/...p/main_img.jpg

Some wheels have only a couple of pad heights to choose from (hi/low, A disk/B disk, etc), a few have more like the SSR SP1s:

http://www.speedstar.co.jp/collectio...ec/spec_19.htm

The top row of the chart (34mm, 46mm, etc) indicates the lip width. The next row indicates the 'pad height/caliper clearance' (HP, MD, NR, and SL). In this case, HP = high brake caliper clearance, and SL = low caliper clearance. Notice the offset matrix, and how the general order of offsets do not play a roll in determing caliper clearance.

The only reason I can figure for different 'pad heights' is simply cosmetic. More pad height equals less rim lip (usually), and less pad height equals more rim lip (for a deeper dish look for the rear).

The link you gave to the wheels does not indicate this though, and it maybe the manufacturer designed the wheel with maximum brake caliper clearance to begin with. I would contact them directly just to make sure though.

Hope that helps.

Speedworks

If it's any use, the importer of the wheels I showed has them on his Lotus Esprit (see www.dvr.be)

dclin

iTrader: (4)

EVOX is a Belgium company? I can't figure out if this website belongs to a distrbutor, or the actual manufacturer, the contact page has me wondering:

http://www.evoxwheels.com/?referer=TuningGids.be

You should give them a call for the final word, though it's been my experience that it's hard to find someone at a distributor that knows what they are talking about. If it is a distributor (and the info they provide seems vague), kindly ask them for the actual manufacturer's contact info.

Speedworks

Evox are Japan wheels that are being assembled in belgium. DVR is the official distributor.