Help on offset calculations for new wheels
#1
Help on offset calculations for new wheels
Just got a brand new 997-2 S Artic Silver 6 spd.
The car currently has the OEM S wheels:
8X19 offset 57 and 5 mm spacer
11x19 offset 67 and 5 mm spacer
Looking to buy Victor Zehn wheels of
8X18 offset 45
11x18 offset 55
Questions:
1-Will the new wheels move inside or out ?
2-Will the new wheels rub on fender or suspension ?
3-Do you recommend this ?
4-Do I substract or add the spacer to the wheel in order to calcualte OEM offset ?
Thanks a lot!!!
The car currently has the OEM S wheels:
8X19 offset 57 and 5 mm spacer
11x19 offset 67 and 5 mm spacer
Looking to buy Victor Zehn wheels of
8X18 offset 45
11x18 offset 55
Questions:
1-Will the new wheels move inside or out ?
2-Will the new wheels rub on fender or suspension ?
3-Do you recommend this ?
4-Do I substract or add the spacer to the wheel in order to calcualte OEM offset ?
Thanks a lot!!!
#2
Rennlist Member
Spacers move wheels out reducing offset - so 5mm spacer on 67mm wheel gives an effective offset of 62mm. You can go here and plug in your options and see what happens - http://1010tires.com/WheelOffsetCalculator.asp
#4
Addict
Rennlist Member
Rennlist Member
Not a bad looking rim. You sure you want to drop down to 18inch config though ? ET55 will be close to outboard of your fender line in the rear. Definitely no need for spacers.
#6
Got a look at the web site you suggested.
Here is my understanding:
OEM set up in FRONT:
57 ET - 5 spacer = actual 52.
New wheels
45 ET - 0 spacer. Only difference of 7 outwards so will clear the suspension
for sure, and should note rub the fender.
Same thing applies to the rear.
Thanks Oups.
Here is my understanding:
OEM set up in FRONT:
57 ET - 5 spacer = actual 52.
New wheels
45 ET - 0 spacer. Only difference of 7 outwards so will clear the suspension
for sure, and should note rub the fender.
Same thing applies to the rear.
Thanks Oups.
#7
Rennlist Member
HELP! i am looking for a set of 19", matte black, street rims and am settled on a style like the champion RS171's which are out of my price range, so i need to compromise. i, too, am looking at the victor zehn's but i have a feeling they'll be too outboard. can someone please check my numbers/logic?
stock '06 997S lobsters: 19x8 ET57, 19x11 ET 67
new zehns: 19x8 ET45, 19x11 ET 55
i dont think i have any spacers (i.e. wouldnt i be able to see them if i did?) and i think this is the only offset they offer in that style/size.
so by the online calcs, wont that will be 12mm OUTWARD for each wheel?? and wouldnt that put the tire (or at least the curb-rash lip) right at or even a little past fender edge? i'm thinkin it's a little much.
or anyone have any cheaper suggestions styled like RS171's? someone told me about AMT tech 110.
penny for your thoughts...
stock '06 997S lobsters: 19x8 ET57, 19x11 ET 67
new zehns: 19x8 ET45, 19x11 ET 55
i dont think i have any spacers (i.e. wouldnt i be able to see them if i did?) and i think this is the only offset they offer in that style/size.
so by the online calcs, wont that will be 12mm OUTWARD for each wheel?? and wouldnt that put the tire (or at least the curb-rash lip) right at or even a little past fender edge? i'm thinkin it's a little much.
or anyone have any cheaper suggestions styled like RS171's? someone told me about AMT tech 110.
penny for your thoughts...
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#8
Rennlist Member
HELP! i am looking for a set of 19", matte black, street rims and am settled on a style like the champion RS171's which are out of my price range, so i need to compromise. i, too, am looking at the victor zehn's but i have a feeling they'll be too outboard. can someone please check my numbers/logic?
stock '06 997S lobsters: 19x8 ET57, 19x11 ET 67
new zehns: 19x8 ET45, 19x11 ET 55
i dont think i have any spacers (i.e. wouldnt i be able to see them if i did?) and i think this is the only offset they offer in that style/size.
so by the online calcs, wont that will be 12mm OUTWARD for each wheel?? and wouldnt that put the tire (or at least the curb-rash lip) right at or even a little past fender edge? i'm thinkin it's a little much.
or anyone have any cheaper suggestions styled like RS171's? someone told me about AMT tech 110.
penny for your thoughts...
stock '06 997S lobsters: 19x8 ET57, 19x11 ET 67
new zehns: 19x8 ET45, 19x11 ET 55
i dont think i have any spacers (i.e. wouldnt i be able to see them if i did?) and i think this is the only offset they offer in that style/size.
so by the online calcs, wont that will be 12mm OUTWARD for each wheel?? and wouldnt that put the tire (or at least the curb-rash lip) right at or even a little past fender edge? i'm thinkin it's a little much.
or anyone have any cheaper suggestions styled like RS171's? someone told me about AMT tech 110.
penny for your thoughts...
#9
ET45 will either be right or just passed that edge of the fender. On a 11" wide wheel you will probably not want to go bigger than a 295 series tire to avoid any outside rubbing issues. ET48 to about ET51 is perfect on a NB 997.
Jason
Jason