I am running 15mm up front and 20mm in the rear. Spacers are fine and any bearing wear is minimal. The bearings on the X5 are very heavy duty.
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"An on ramp is a terrible thing to waste"
EuroCharged Tune--QTP 3" Cutouts--V1 Hardwire--K&N Carbon Delete
OEM Muffler Mod--(Best Mod Ever) 15mm Front Spacer--20MM Rear Spacer
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