[GTony]

When I got my wheels from the USA they had a Centre Bore of 74.1mm so I was supplied with Hub Rings to match my cars 72.56mm C/Bore.
Because of my concern for some rough installer just banging the wheel onto the hub I got 2 sets of H/Rings in case they damaged one, taking into consideration virtually impossible to get in Australia and how long they would take to come from O/Seas.
In fact will put wheels in other car, get tyres put on and balanced then take home to put on X1 myself using my torque wrench 120nm I believe. Will then take back for wheel alignment. At least knowing no H/Rings are damaged.
Decided on Hard Plastic because the seller said they were better, more flexible than Metal ones. What thoughts on Metal or Hard Plastic ??
SPACERS - Are these supplied to exactly fit your Centre Bore or do some have to have H/Rings also?
Just wondering - If your new wheels and spacers both need H/Rings + longer bolts, is that safe as long as there torqued, balanced and aligned correctly?
Not considering Spacers but might have to if I want a bigger Tread Width.