This may be a silly question but does anybody know what size weights you need for each wheel? Ive got new wrx wheels and for some reason the weights are 20s up front with one 10 and one five at the rear. Is this right and does it really make much of a differance?

And if this is a stupid question please move me to the muppet forum!

The weights will vary from wheel to wheel - depending on how far out of balance the wheels/tyres are :)

should be able to help explain, as i fit tyres on weekends.
as ianE said above, the weights depend on how far out of balance the wheels are.
the tyres are fitted to the wheels (no weights at the moment).
the wheels, with tyres fitted, are then (one at a time) clamped onto an electronic balancing machine. this machine spins the wheel to simulate road use, and senses any vibration. when the machine stops spinning, it indicates the value of the weight (ie 20g) and the position where it should be around the circumference of the wheel. a weight is applied to the inner and/or outer of the rim.
and hey presto, no vibration when driving!
hope this has (sort of) explained!

cheers

ian

Thanks guys, the reason i asked was because i needed a new wheel and tire, and a friend told me i shouldnt have one worn and one new tire on the front, so i changed the fronts for the backs. But does it make any differance if the two 20s are now at the front and the 5 and 10 at the rear?

Once the wheel is balanced, it can go on either the front or the back.

But there are other much more serious concerns which you must take note of, such as the direction of rotation. Not all tyres are directional, but most are - look for the direction arrow on the sidewall.

Also, you need four good and evenly matched tyres on a fast car like a Scoob, or you'll be swapping ends and finish up in a hedge. Mixing makes and different amounts of wear on the same axle can also damage the differential, unless you stick it in the hedge first.

Don't skimp on tyres.

If you're still confused, post again with exact details of what tyres you've got and the tread depth.

Richard.