what are spacers for rims?

 

Its something that extends the axle so you can put rims with different offsets like the new camaro or corvette wheels.

 

how badly does new rims/tires mess up your speedo and stuff?

 

if you don't change the overall dimensions I dont think it changes anything. So if you went with bigger rims but thinner tires they'd be the same size.

------------------
90 IROC 5.7l (L98)
ram air, K&N's, air foil,Flows

LIKE A ROC

http://members.nbci.com/IrocZgarage/home.htm

 

does anyone know the dimensions or anything for a stock 92 RS?

what would thinner tires do? sorry so many dumb questions, im not a rim person...
heh

 

thinner tires with the bigger rims would keep the overall diameter of the wheel/tire combo the same. They just have a bigger hole to accept the larger wheel and have the same outside diameter.