To fit 850 wheels on a 740, you have two options. One: buy 20mm spacers and longer wheel studs (expensive and labor intensive to swap the studs). Option two: buy 23mm wheel adapters, which are spacers with separate studs. Then you just bolt the adapter to the hub (keeping the stock wheel studs) and then you bolt the wheel onto the adapter, so you use twice as many lug nuts as usual. For wheel adapters, I would recommend <A HREF="http://www.wheeladapters.com" TARGET=_blank>www.wheeladapters.com</A> <P>Good luck.<P>