I'm not sure Funkeh, I'm assuming they used +25 - +30 offset, so to get the rim out that far, you'd need at least an 11", maybe 12" rim on the rear to fill those guards. My 9" rims on the back are f-l-u-s-h with the wheel arch with +35 offset on the standard guards, you'd at least need a couple more inches on that width to fill out those BN rear guards. As for the front... same. My 8" sit a tad in from the stock front guards, so I would've thought another couple of inches to fill out the BN guards... at +35 or +40 offset...Why don't I just e-mail them...:confused: