 Vaughn
"11th Year" Gold Supporting Member
Posts: 13560
Loc: Colorado Springs, CO
Reg: 08-08-04
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06-24-12 01:17 PM - Post#2240809
In response to gchemist
Wheels have been hub centric since the 70s. If you have an 84, it already uses hub centric wheels.
Hub centric means that the wheel isn't located on the rotor (or drum) by the lug nuts. It is located on the center of the rotor/drum, and only held on by the lugs. The reason that vehicles started doing this is because the wheels (when centered by lugs) tended to be slightly (or in some cases badly) off center from the drum/rotor - causing the wheels to make a rump-rump-rump noise while going down the road, and it makes you feel like you are on one of those kiddie roller coasters that just go up and down a little bit.
Back when bias ply tires were the only tires out there, that was perfectly acceptable because bias ply tires are always a little off center (unless you had them shaved on the car with special tire equipment) - so the car companies didn't bother with hub centric wheels. However, once radial tires came on the scene - and radials are self centering when rolling down the road due to their construction - hub centric designs became necessary.
You may have to use different lug nuts to get the wheels to bolt up. 84 wheels had a straight taper, while the mid 90s trucks had a rounded taper on the lug. Using straight taper lugs on a rounded wheel significantly reduces the contact area, which can cause the lug nuts to loosen over time, and possibly fail. You should be able to get the right lug nuts from Autozone or O'Reillys or whatever parts store chain you have nearby.
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