7.50's is as large as you can go on a series without looking foolish and people thinking you are trying to make it look like the defender you cannot afford.

Unless you have a military chassis or the equivilent civillian 1ton variant. If that is the case you can fit 9.00's and ex-military bar grips look very good in that size.
 
Always a risky business having big wheels for no other reason than vanity.

People could mistake you for a nob

Other than that it would depend on how much your willing to change the chassis and bodywork.
 
I think it also depends what engine you have. I have 7.50 R16 tyres on LWB size rims. I wouldn't want to go any bigger with them powered by a 2.25d. With a more powerful engine you could potentially go bigger but in my humble opinion I think they look wrong on a short wheel base Series Landy. You also need to consider the condition of your steering too - bigger wheels / tyres may mean more steering wander and possible small extra ware on your wheel bearings. Width is equally an important consideration - personal opinion but I think Series Landy's look better on thinner tyres. You also don't want them wider than your arches. Google images is always useful to browse to help you achieve the 'right look'.
 
I think it also depends what engine you have. I have 7.50 R16 tyres on LWB size rims. I wouldn't want to go any bigger with them powered by a 2.25d. With a more powerful engine you could potentially go bigger but in my humble opinion I think they look wrong on a short wheel base Series Landy. You also need to consider the condition of your steering too - bigger wheels / tyres may mean more steering wander and possible small extra ware on your wheel bearings. Width is equally an important consideration - personal opinion but I think Series Landy's look better on thinner tyres. You also don't want them wider than your arches. Google images is always useful to browse to help you achieve the 'right look'.

I would also agree with that, I went from 205's to 7.50's on my 2.25 diesel and it made acceleration noticeable slower. I didn't notice any other difference in terms of steering wander or turning circle, but 7.50 is a standard landrover size fitted to the LWB
 
I would also be wary of the load on the halfshafts, The final overload protection of the halfshafts is wheel slip and a smaller dia narrower wheel will slip sooner. If you put a lot of torque into a large dia wheel you may find a halfshaft gives up before the wheel slips, I'm sure there's some margin, but climbing a hill with bigger wheels requires more transmission torque.
 
think it depends on how much work you're prepared to put in to make things work? My s3 truck cab had 265/75r16 fitted with spacers, any bigger and you might have to shave something/ lose steering lock bla bla bla? Personally i thought it looked pretty cool but i changed them out for fear of falling foul of insurance. Plus it was a t**t to turn.
 

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