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Optimum Performance has some 25MM spacers coming in soon!!!

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Bill Pemberton

0ld Ford Automotive Racing Terror
8,422
8,346
Exp. Type
Time Attack
Exp. Level
20+ Years
Blair, Nebraska
Seems like many folks out there carry the 1/2 inch or 1/4 inch , but if you get a set of 18x11s ( say Apex rims as an example) you will need this size spacer. OP has been one of the go to places to go to get them and he is priced right. Just a little note of interest for those that may need a set , as often they seem to be out of stock with many suppliers and we always need them one week before we go to the track. Trying to help out my fellow procrastinators , as now is the time to organize and buy those 2020 track necessities.
 

ArizonaBOSS

Because racecar.
Moderator
8,730
2,734
Arizona, USA
I have run OP's 25mm and 31mm spacers in the front without issue. 31mm was combined with OP's GT350R MSI studded-hub offering.
 
301
360
Exp. Type
HPDE
Exp. Level
3-5 Years
Raleigh, NC
So I think spacers are in my future. My MPSS’s are ok but thinking I need to go with a stickier tire which might have a wider section width. Things are close now with 275/35/19s. Maybe 3/8” clearance tops, might be closer to 1/4”. Have never used spacers. Looks like OP are what y’all are using? Recommendations appreciated. What I see on the OP website is sets with longer studs and open lugs. Thinking of going with 1” studs just so they fit everything and 20mm in front.
 
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Bill Pemberton

0ld Ford Automotive Racing Terror
8,422
8,346
Exp. Type
Time Attack
Exp. Level
20+ Years
Blair, Nebraska
Not sure I understand your decision on the studs but would suggest a 3 inch ARP --- call OP on Monday or email them from their contact page and they will guide you.
 

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