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I was walking past my 993 yesterday (I hate the winter) and noticed that my wheels were a little more inward then I’d like. A little more poke would give it an even better stance so I’m considering spacers but I know little about them. Will a 5mm spacer push the wheel out 5mm? Is it as simple as that? Any safety or performance concerns when using spacers(Don’t want to do anything that will be detrimental to handling or ride quality)? What’s the best way to decide what size I need for both front and rear? Also, what brand is recommended and is any additional hardware requested like longer studs?
Here is how the car sits now. What do you guys think?
I have installed spacers on just about every car I have owned. You might find that 10mm will not be enough but just put a straight edge across the wheel arch and measure the gap between it and the tyre. In any case you will probably need longer wheel studs and make sure the spacers are hubcentric to avoid any problems.
The C2S had spacers on the rear as standard so if these are still being used I would just replace them for some say 15mm thicker, you dont really want a spacer on a spacer. Most 993's will take 7mm front and 15mm rear with standard wheel and tyre sizes (I say "Most")
Curious if you put the spacers in, how it changes the look.
i have a guards red w 18” fikse wheels and feel the same way, mine looks to have a similar ride height as well.
Offsets are 18x8 ET50 for the fronts and 18x10 ET60 for the rears
F: You can easily add 5mm spacers to push the wheels outboard.
R: You’re currently at 10” et 50. I would stay as is. Adding 5mm spacers here would give you a final ET 55 which is very tight. Chances are you will rub with suspension travel and will limit how low you can go. You can remedy the rubbing by trying different tire brands or start tweaking for more negative camber- not worth the trouble IMO.
F: You can easily add 5mm spacers to push the wheels outboard.
R: You’re currently at 10” et 50. I would stay as is. Adding 5mm spacers here would give you a final ET 55 which is very tight. Chances are you will rub with suspension travel and will limit how low you can go. You can remedy the rubbing by trying different tire brands or start tweaking for more negative camber- not worth the trouble IMO.
F: You can easily add 5mm spacers to push the wheels outboard.
R: You’re currently at 10” et 50. I would stay as is. Adding 5mm spacers here would give you a final ET 55 which is very tight. Chances are you will rub with suspension travel and will limit how low you can go. You can remedy the rubbing by trying different tire brands or start tweaking for more negative camber- not worth the trouble IMO.
Spacer width is subtract from the numerical value of the wheel ET, The lower the ET the more outboard the wheel.
A 10ET50 w/ a 5mm spacer becomes a 10ET45
The best fit for a low 993 is 10ET65, These have the outer face plane(AKA f/s 74.7mm out from the hub face and b/s(AKA backspace) 204.7mm from the same hub face. This is close to max on both sides. The tire generally projects a bit more on each side but that depends on the tire specifics.
The higher the ride height the more flexibility you have for width and ET
a10 ET 50 has a f/s of 89.7mm and a b/s of 189.7mm
a10 ET 45 has a f/s of 94.7mm and a b/s of 184.7mm
I was walking past my 993 yesterday (I hate the winter) and noticed that my wheels were a little more inward then I’d like. A little more poke would give it an even better stance so I’m considering spacers but I know little about them. Will a 5mm spacer push the wheel out 5mm? Is it as simple as that? Any safety or performance concerns when using spacers(Don’t want to do anything that will be detrimental to handling or ride quality)? What’s the best way to decide what size I need for both front and rear? Also, what brand is recommended and is any additional hardware requested like longer studs?
Here is how the car sits now. What do you guys think?
Yes the wheel/tire assembly is pushed outboard by the spacer thicknessThe more outboard the wheel center line the more stress on the bearings, usually not a big dealThe more outboard the wheel center line the more scrub radius is reduced, a stock 993 front w/ 7ET55 has a scrub radius of -10, 8ET50 changes that to -15, scrub radius needs to stay below 0 for ABS to work, The higher the absolute value of scrub the more steering feed back is passed through the steering wheelThe thicker the spacer the less thread engagement for the lug nuts, I like to have the nuts fully engaged ie flush w/ the bolt end. It's possible to ooch that a bit but the less engagement the worse it is.The thicker the spacer the more unsprung rotating mass, this degrades performance a bit in several areas.
I have a 2006 4S. I had 19x8.5 front and 11.5 rear then i was told that the Wheels were damaged so i put on 19x8.5 front and 11 rear i searched for 17mm spacers for the rear but i could not find and so I order 18mm from ECS is that to big or should i havd order 15mm I just want the wheels to sit flush with the fenders. Any help please.
03-08-2019, 07:09 AM
Spacers
