This a hard one to explain . If its an Et 40 your going to need atleast a 25mm spacer to get it down to an ET15 (cyclones =ET15) but tbh if its an aftermarket wheel id want a ET 10 there for needing a 30mm spacer.
Just to give you an idea. Iv ran 15mm spacers on cyclons on the rear (which makes it a ET 0) and it was only just and just catching
TOM LUM. If your wheels are ET20 and your running a 20mm spacer. All together you are running at ET-0
For example: Cspellow's wheels are a ET-0 ge has added 20mm spacers so now he is running at ET MINUS -20
Just to give you an idea. Iv ran 15mm spacers on cyclons on the rear (which makes it a ET 0) and it was only just and just catching
TOM LUM. If your wheels are ET20 and your running a 20mm spacer. All together you are running at ET-0
For example: Cspellow's wheels are a ET-0 ge has added 20mm spacers so now he is running at ET MINUS -20
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