[Tigers] Wheels

[CoolVT at aol.com]

Found this definition/article on some site.  Now I know why my  Cragers 
aren't easy to keep vibration free...they're lugcentric.
Mark L.
 
Hub Bore Hub bore is the diameter of the  central hole in your wheels. This 
hole fits over the central projection on your  hub. Since the wheel is centered 
on the hub it is called hubcentric. Since  manufacturers use different hub 
bores aftermarket wheel manufactuers usually do  one of two things. Both involve 
making the hub bore relatively large. In the  first case the wheel 
manufacturer makes the hub bore large, so it fits a variety  of cars, then supplies 
Hubcentric rings, that fit inside the bore and  adapt it down to the size of the 
hub projection on various cars. This way they  can make/stock 25 different 
hubcentric rings instead of 25 different wheels. The  "one size fits all" wheel, 
plus the correct ring, makes the wheels hubcentric  for a specific car. The 
other option is to leave the hub bore large, and not  supply rings. In this case 
the wheel becomes Lugcentric because the wheel  is not centered on the hub, 
but instead the lug nuts/bolts. Lugcentric wheels  are much harder to center 
than hubcentric wheels due to the fact that it is not  centered on a central 
projection. For this reason lugcentric wheels are more  prone to vibration and 
shimmys at speed, if mounted correctly however,  lugcentric wheels can be trouble 
free.
 
 



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