Wheel offset chart
08-14-2003, 07:53 AM
#1
Race Car
Thread Starter
Wheel offset chart
I have tried to search for this, but could not find it. I am thinking of getting some Cup wheels for my 85/2 944. I see a lot of references to early and laate offset, but don't know what requires spacers or oews not fit. Anybody know where the chart is? I think there is one on Clark's but it says it is being worked on.
For a specific example, wopuld a set of 17x7 and 17x9 wheels wirh 55mm offset from a 993 work on my car? Sorry for the confusion!
-Bart
For a specific example, wopuld a set of 17x7 and 17x9 wheels wirh 55mm offset from a 993 work on my car? Sorry for the confusion!
-Bart
08-14-2003, 08:28 AM
#2
Drifting
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85/2 has the aluminum control arms but uses the old offset (as does the 86 too). 87 and onwards use the late offset.
Early offset is 23mm, late 52mm or so... and there's enough space for maybe -5mm (outwards) or +10mm (inwards) depending hugely on how wide rim you're considering. With 7" and 9" these margins should work IIRC... apparently the rear wheels could use even less offset in early cars (??)
So if you want to get those 993 wheels, you need approx. 20mm spacers to bring the total offset close enough. In the rear maybe a bit more (25-30mm?) to fill the arch nicely...
Early offset is 23mm, late 52mm or so... and there's enough space for maybe -5mm (outwards) or +10mm (inwards) depending hugely on how wide rim you're considering. With 7" and 9" these margins should work IIRC... apparently the rear wheels could use even less offset in early cars (??)
So if you want to get those 993 wheels, you need approx. 20mm spacers to bring the total offset close enough. In the rear maybe a bit more (25-30mm?) to fill the arch nicely...
08-14-2003, 09:50 AM
#4
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Rennlist Member
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I would recommend that you contact Crow Automotive (use Google to search for them on the web). They have good prices, quality parts, and good service.
Do your homework fist!!! What I mean by that, is get your measurements straight before you order the spacers.
Also, you'll have to make a choice between "bolt-on" spacers that come with their own studs, or spacers that require you to remove your hubs and install new studs in the hubs. The former option is simpler and cheaper; the latter option is more elegant.
I have heard some speculation that the bolt-on spacers are not as safe as replacing the studs. However, PCA allows the bolt-on spacers to be used on the track, and I have seen plenty of people use them on track cars with no problems.
Do your homework fist!!! What I mean by that, is get your measurements straight before you order the spacers.
Also, you'll have to make a choice between "bolt-on" spacers that come with their own studs, or spacers that require you to remove your hubs and install new studs in the hubs. The former option is simpler and cheaper; the latter option is more elegant.
I have heard some speculation that the bolt-on spacers are not as safe as replacing the studs. However, PCA allows the bolt-on spacers to be used on the track, and I have seen plenty of people use them on track cars with no problems.
08-14-2003, 11:23 AM
#6
Former Sponsor
I have 17x7.5 23mm, 225/45 on the front of my car with no rubbing at all. Rears are 17x9 47mm with 2 5/16" generic spacers(8mm), 255/40, longer wheel studs (72mm?) with slight rubbing on the inside. Could probably use one more of the spacers in there.
