Wheel Spacer Lips & Hub Centricity

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jpitt182

Junior Member
Joined
Mar 6, 2020
Posts
4
Reaction score
3
Location
Tennessee
Ram Year
2019 Classic
Engine
5.7L HEMI
I’ve got a pair of SSBC calipers sitting in my garage waiting to get installed, but when I test fit them this past weekend the inside of the wheel was kissing the outside of the caliper slightly. Long term I’ll most likely end up getting some new wheels that will clear them, but that won’t be for at least a year so in the meantime I need to get some wheel spacers to fit the calipers. I don’t need much, probably 1/4” would do it but I may go up to 1/2” if that still leaves enough thread on the studs. For reference this truck is a 2019 1500 Classic with a 6” lift and 37” tires on 17” Pro Comp 97 steel wheels. I believe the center bore of the wheels is 108mm.

I’ve never used wheel spacers before so I’ve been going through the relevant threads here and on other sites but still have a lingering question or two. When we talk about a spacer being hub centric, are we referring only to the center bore of the spacer meeting the hub, or is the inner lip of the spacer acting as a hub centric ring for the wheel also an important part of the setup? The reason I ask is my wheels have a push through center cap which, best I can tell, won’t fit with a part designed to hub center the wheel, and I don’t want to leave the end of the axle exposed.
 
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