Mark, no spacer kit will be able to lift your belly!
Actually it
will give you more ground clearance (belly wise), but your lower control arms are still exposed and get very little benefit out of the lift. A lift will slightly improve your approach / departure and break-over angles. Bigger tyres certainly help ... they lift the whole vehicle including the control arms / rear diff by a few centimetres .... not a lot, but it does help and can make all the difference between clearance or snagging. Also, bigger wheels don't fall as deep into a depression / rut as a smaller wheel would .... that in itself minimises the need for lift in such a circumstance. If one wants to get technical, bigger wheels also weigh a little more, adding to the unsprung weight, which generally reduces ride comfort a little but also slightly lowers the COG .... just a tiny bit .... and sometimes again it's just that little bit that prevents the tipping of the COG scales.
So really it's what suits your needs .... are you doing a lot of rough terrain where you need ground clearance, or are you doing severe side angles / sideway rocking where COG is extremely important .... or somewhere in between? Your individual requirements are what determines what is too much or too little lift. Normally somewhere around 100mm lift is a good average.
60mm Lift isn't bad ... (I thought that a 30mm spacer should give a little more), and it's also not going to put too much strain on your CV joints.
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