Sputnik

18 inches. The front is 8.5 and the back is 10. The offset is ET52 in the front and ET47 in the back..
Is it right offset fot narrow body?
I will have to get spacers to install these wheels?
Thanks in advance!

kkim

rears won't work, no matter if you use spacers.

Sputnik

thanks!

User 4221

Sputnik,

The fronts are 0.87" wider than stock and the rears are 1.5" wider than stock.

Spacers will make the situation worse.

HTH,
Scott C

Sputnik

What are the stock offsets for narrow 993?
And then...does the lower ET number mean wider wheel?
Will it mean that ET47 wheel is wider then ET 63...on 16 mm?

kkim

1. https://rennlist.com/forums/showthre...hlight=offsets

2. lower et means the wheel is offset more towards the outside of the fender (towards the fender lip) instead of the chassis.

3. no, it means the et47 wheel will be offset 16mm towards the outside of the car than the et65 wheel.

David in LA

IIRC stock offsets for NBs is ET56 and ET65, but I think it depends on whether you are talking about the stock 16" wheels vs. the 17" wheels vs. the optional 18" wheels.

The offset for 993s are actually negative offsets, so actually you are comparing -47 vs -63....this can be confusing as some cars use positive offsets. A reduction in negative offset is a positive move so going from -63 to -47 is moving the wheel 16mm outboard (i.e. towards the fender) .

Sputnik

The relationship between the offsets and tire sizes makes the understanding even more difficult.
Last question about the wheels. I promise.
Will these wheels fit the narrow body:
8x18 ET 50, 225/40-18
11x18 ET 63, 295/30-18
Pirelli P-zero N3
Thanks again!

Sputnik

Since they drop MINUS sign describing the wheels offsets then:

Front will need 6 mm spacer
===================
Stock is ET(-56) ...so it needs 6 mm offset spacer in positive direction to become ET (-50) for the wheel with offset ET 50 (which is actually negative -50)

===================
and the rear will need 2 mm spacer

Stock is ET(-65)...so it needs 2 mm offset spacer in positive direction to become ET (-63) for the wheel with offset ET 63 (which is actually negative -63)

Right?

kkim

You cannot use spacers to go to a larger negative number. The only way to go more negative would be to shave off some of the hub material, which isn't recommended.

The offsets on the wheels you mention are close enough to work, I believe. However the size of the rear tire may cause some problems. Try doing a search and see if anyone else is using that size. Also, different tires have different dimensions, so it's not a hard and fast rule what will work and what won't.

David in LA

Kelly is right WRT spacers...spacers can only move the wheel out - which for a negative offset setup means a smaller ET, but if you are dealing with positive setups means a larger ET. Shaving the wheel face is NOT recommended.

The fronts will fit, but I'm not sure whether the rears will work. I am running 11" wide wheels on the rear of my cab and I believe the offset is ET56 or somewhere thereabouts...check previous threads or the Gemballa website (my wheels are Gemballa Competitions). The wheels not only have to clear the outboard fenders but also the inboard suspension components. I'm currently running 285s with rolled fenders and I think 295s would fit on my setup.

What wheels are you considering? I think almost every common wheel setup has been tired by someone on this forum so disclosing the wheels you are thinking about might get you a fast answer as to whether they will fit.

Sputnik

The wheels are Sport Techno hollow spokes. They were originally designed for 996 models I believe. Aside from offset fitment I am concerned how well they will fit classic look of 993 body shape. Those Sport Techno wheels have something derived from modern "edgy" styled cars...I would tend to see them on cars with look like Ford Mustang or Audi TT. I've photoshoped the images of the wheel on top of 993 (photo of some wide body 993 I found on one of the Rennlist posts). What you think about their look when they are "installed"?

David in LA

I don't think the Sport Technos will fit a NB car. As far as looks...well, they are different and I have yet to see a 993 with them....really not bad, but doesn't do anything for me either. I personally am a fan of 5 spoke wheels on 993s but those just don't do it for me...lots of better looking rims out there IMHO.