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Username Post: 1965 Panel Truck
someotherguy 
Senior Moderator
Posts: 29352
someotherguy
Loc: Texas
Reg: 08-01-03
01-13-20 12:22 PM - Post#2784332    
    In response to Chevy_Stepside

Also generally the wrong backspacing. Modern GM trucks have a wider track and to go with that, the centerline of the wheel is much farther towards the outside of the hoop. This trend began with the 1988-1998 (GMT400) 4WD trucks, but is part of the design RWD or 4WD with the 1999-up (GMT800) generation.

They may sit too far inboard on your older model, including tire rubbing on frame during steering, wheel hoop rubbing on control arm/ball joint, etc. it may not be obvious if just test-fitting and turning steering lock to lock while not driving...

Of course, same-pattern bolt-on spacers might solve the issue if you really want to run the late model wheels. Would also eliminate any hub bore size issues, as well as center cap fitment issue due to front hub dust cap interference. Remember the modern trucks have unit wheel bearings with no protruding dust cap at the hub, so they often have very small center caps that are not compatible with older hubs.

Richard
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

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