i fitted the hub to the BBS alloys with the hub centre touching the edge of the chamfered alloy bore.
the hub to alloy gap is 7.8mm so I'd need an 8mm spacer :/
this moves the tyre closer to the wheel arch lip when the suspension bottoms out and I'm not sure bout the extra stresses on the bearings on the track with such large offset.
the available spacers are either 2 x unversal spacer for £31 but not much metal for transferring brake heat
http://www.ebay.co.uk/itm/WHEEL-SPA...=AU_Car_Parts_Accessories&hash=item3cc8267047
or a pair of solid Alu spacers for um, £54
http://www.ebay.co.uk/itm/HUBCENTRI...r_Truck_Parts_Accessories&hash=item25725acdf0
the standard wheel studs are 46mm long and the alloy wheel nut has 30mm of available thread.
I measured the nuts are using 21.2mm of the thread on the Rotas and only 13mm of thread on the BBS with spacers. With such a high stress sticky tyre and pushing the wheel 8mm further out from the hub, it doesn't sound very safe
the stud would have to be extended by 8mm so that using the BBS on track the wheel nuts will screw in by 21mm, same as the rotas now, and when i swap back to the rotas going home the nuts will screw in almost fully at 29.2mm
these 16 x extended 63mm studs are £38
http://www.ebay.co.uk/itm/Nissan-Mi...Wheels_tyres_Trim_Nuts_ET&hash=item2ebf9a6928
so the options here are:
1- to fit the sticky BBS wheels on with extra £31-54 spacers and £38 longer studs = £69-92 on top of the £368 i paid for the wheels = £460.
This would retain the wheels resale value of potentially £50 per wheel = £400 so I'd have only spent £60 overall in the end to use 7 r888's
But it'd be slightly compromising safety/reliability of the wheel bearings and fouling the wheel arch (could be fixed by adjusting bumpstop)
2- to get the BBS wheel bore proper machined for est £50 & labour of remove/fit/balance tyres for £60 = £110 on top of £368 for the wheels = £478.
The enlarged bore might affect its resale value down to maybe £40 per wheel? = £300 so I'd spent £178 overall in the end to use 7 r888's
This option is much safer and reliable
financially for just £178 overall to go get the wheels machined for safety sake, in the end it's pretty clear & logical decision cos in comparison I would've originally been spending say £184 on a pair of federal 595rsr and £200 on a pair of new rota's and £30 to fit em = £414
tis a no brainer