Damn, I didn't know that the UK had beaners too!

As one who rides bikes I think spinners suck.  We watch the rotation of the
front wheels rather than the vehicle itself to make sure that it is stopped at
an intersection.  
 
beekeep

Yar,
I'm not sure it is practical. The conversion is meant for 2500 and 3500 8
lug trucks. On the intended vehicles, the suspension is quite a bit larger
and stronger and they use a 6.5" x 8 lug pattern, not your light duty 5 bolt
you have. Secondly, these wheels alone weigh 65 lbs each and are made out of
6061 T6 Aluminum (aluminium to you). The average wall thickness is 3/4"
(19mm). The mating tires are about 650 pounds sterling each. They will add a
minimum of 3" of vehicle height and will not clear your fender wells without
at least a 3" lift kit. In order to get your ball joint angle of incidence
to intersect the center of the tire patch, .250" must be machined off the
inner bolt face of the wheel. On the rear, the problem is worse, as the tire
hits the rear quarter panels. So drastic body modification is required with
huge flairs or you narrow the rear axle housing by 6", shorten your axles,
remount inboard your spring perches and tub the bed. The increase in
unsprung weight will require much heavier shock absorbers (dampers) as well.
Even on a 3500 dually you are talking $5,000. You would have to double that,
not to mention your gear change would be from 3.55 to effectively a 2.9. If
after this, you are still interested, I can give you firms that might take
on the job, but the safety issues alone should make a brave man retreat.
Steve

Here in the states the Ram SRT-10 rolls from the factory on 22" rim and
305/40 R22 tires. My 05 Ram SLT 4x4 rolls on 20" rims with 275/60R20 tires
(That is 33in from the ground to the top of the tire) With that being said I
can put 24" rims on my truck and 315/35R24 tires (That is 32.7in from the
ground to the top of my tire) That size of tire in the state will cost me
around $590usd each. The cost of 24 inch rims $530usd and on up. Just be on
the look out for pot holes as they will bend your rims at high speeds.

There are NO advantages to big dia. wheels except they can accommodate
bigger brakes.
They look lousy, ride,brake & accelerate poorly!
Buy a racoon tail if you want to look different, its cheaper.