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Wheel offset

  • Thread starter Thread starter CeceT798988
  • Start date Start date Jan 16, 2026
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CeceT798988

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Jan 16, 2026
#1
  • Jan 16, 2026
  • #1
Need help! Will a 18x9 wheel with a 30mm offset fit my 1988 Mustang gt convertible? Thanks
 

AeroCoupe

lube between the nut and the face. I know my lubes
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Jan 17, 2026
#2
  • Jan 17, 2026
  • #2
Front or rear and have you changed to five lug?
 

KRUISR

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#3
  • Jan 17, 2026
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If 5 lug, which spindle are you using? Wheel spacer or not? What tire size are you looking at?
 
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CeceT798988

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#4
  • Jan 18, 2026
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Im sorry 5 lug conversion 255/35 R18 front 275/35 R18 rear.
 
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CeceT798988

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#5
  • Jan 18, 2026
  • #5
KRUISR said:
If 5 lug, which spindle are you using? Wheel spacer or not? What tire size are you looking at?
Click to expand...
Five lug conversion
 
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CeceT798988

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Jan 18, 2026
#6
  • Jan 18, 2026
  • #6
CeceT798988 said:
Need help! Will a 18x9 wheel with a 30mm offset fit my 1988 Mustang gt convertible? Thanks
Click to expand...
Five lug conversion, think I might need 1/4 spacers to make it work?
 

KRUISR

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#7
  • Jan 18, 2026
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I have the same tires on 18x9s. Only difference is my rims are +24mm offset. I used 8mm spacers front and rear to get a better look in the wheel well. The front needed the spacer to clear the coil over springs I have, the rear I did just for looks. If I didn't have coil overs I would not have needed the spacer for clearance.

Are you using SN95 spindles or stock spindle and ranger rotors?

Further to what I have listed above, I also have 2001 spindles which move the wheels further out compared to 94/95 and stock spindles.
 
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CeceT798988

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#8
  • Jan 18, 2026
  • #8
KRUISR said:
I have the same tires on 18x9s. Only difference is my rims are +24mm offset. I used 8mm spacers front and rear to get a better look in the wheel well. The front needed the spacer to clear the coil over springs I have, the rear I did just for looks. If I didn't have coil overs I would not have needed the spacer for clearance.

Are you using SN95 spindles or stock spindle and ranger rotors?

Further to what I have listed above, I also have 2001 spindles which move the wheels further out compared to 94/95 and stock spindles.
Click to expand...
Stock spindles
 

KRUISR

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#9
  • Jan 18, 2026
  • #9
With your current set up, I would go with a bolt on hub centric spacer 15-20mm thick (if you are not planning suspension changes).



That should get your wheel in the wheel well similar to mine.

 
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CeceT798988

Member
Nov 10, 2025
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Jan 18, 2026
#10
  • Jan 18, 2026
  • #10
KRUISR said:
I have the same tires on 18x9s. Only difference is my rims are +24mm offset. I used 8mm spacers front and rear to get a better look in the wheel well. The front needed the spacer to clear the coil over springs I have, the rear I did just for looks. If I didn't have coil overs I would not have needed the spacer for clearance.

Are you using SN95 spindles or stock spindle and ranger rotors?

Further to what I have listed above, I also have 2001 spindles which move the wheels further out compared to 94/95 and stock spindles.
Click to expand...
I was thinking I needed the 1/4 spacers based on your wheel offset of +24 so I may need spacers bigger than that to get the same look you have. I have an all new stock suspension.
 
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CeceT798988

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Jan 18, 2026
#11
  • Jan 18, 2026
  • #11
KRUISR said:
With your current set up, I would go with a bolt on hub centric spacer 15-20mm thick (if you are not planning suspension changes).



That should get your wheel in the wheel well similar to mine.

Click to expand...
Thank you I have a stock all new suspension and the wheels are 18x9 +30 offset
 

KRUISR

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#12
  • Jan 18, 2026
  • #12
Probably. My spindles move the wheel outboard 8mm more than the stock spindles (according to Maximum Motorsports Tech Article on spindle swaps). Plus I am using an 8mm (5/16") spacer. So to achieve the look I have you would need 16mm. I don't think they make that size so your would need to go 15 or 20mm.

Ahh wait a second. Just remembered that I also moved my lower control arm inboard 1/2" (12mm) to gain some camber adjustment. So re-thinking my above comment, you should be pretty good with a 1/4" (6mm) to 5/16" (8mm) spacer.
 
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CeceT798988

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#13
  • Jan 18, 2026
  • #13
AeroCoupe said:
Front or rear and have you changed to five lug?
Click to expand...
Yes
KRUISR said:
I have the same tires on 18x9s. Only difference is my rims are +24mm offset. I used 8mm spacers front and rear to get a better look in the wheel well. The front needed the spacer to clear the coil over springs I have, the rear I did just for looks. If I didn't have coil overs I would not have needed the spacer for clearance.

Are you using SN95 spindles or stock spindle and ranger rotors?

Further to what I have listed above, I also have 2001 spindles which move the wheels further out compared to 94/95 and stock spindles.
Click to expand...
yes I was copying your setup. Lol
 
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CeceT798988

Member
Nov 10, 2025
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Pittsburgh
Jan 20, 2026
#14
  • Jan 20, 2026
  • #14
T
KRUISR said:
Probably. My spindles move the wheel outboard 8mm more than the stock spindles (according to Maximum Motorsports Tech Article on spindle swaps). Plus I am using an 8mm (5/16") spacer. So to achieve the look I have you would need 16mm. I don't think they make that size so your would need to go 15 or 20mm.

Ahh wait a second. Just remembered that I also moved my lower control arm inboard 1/2" (12mm) to gain some camber adjustment. So re-thinking my above comment, you should be pretty good with a 1/4" (6mm) to 5/16" (8mm) spacer.
Click to expand...
Thanks sounds good will try 6mm or 8mm.
 
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