Juddering after wheel & tyre change

Yes I know its a tyre question

Been searching for a couple of hours but cant find my answer?

Just fitted some bigger tyres to my disco. The tyres are 235/85/16 Insa Turbo Dakar's

I had to trim the lower front bumper and a small part of the rear arch to make sure they don't catch but I still have a problem with a severe judder??

It only occurs when manoeuvring at very low speeds like parking? normal driving it seems ok but I have only done a few miles. It seems to happen as soon as I start turning the wheel. Is it the tread pattern skipping across the road surface? or are the tyres catching something I have missed like the radius arms. I know there are steering stops somewhere could that be my problem?

A friend of mine has the same size tyres (BFG's) and he has made no modifications like cutting etc and his are fine, we both have a 2" lift.

Only driven it at 30mph and it corners and seems fine at that speed no juddering ??? I thought if it was hitting something I would still feel it?

Over to you guys, what's the bet its something simple!

I expect the tyres are catching on full lock.

screw the lock adjusting nuts! on the front hubs/axle, i had to do mine on the old 1 when i went from 16's to 18's

They will be catching on the radius arms so you need to adjust the lock stops. If you leave it I think it will be an MoT fail.

cheers guys looking up how to do it now

Hi there, I´ve got 235 85´s on mine and you will definitely have to wind the steering stops out to stop the tyres catching the radius arms on full lock. Simply wind the nuts out until the tyres stop hitting. I have the ranger tread pattern fitted which is less aggressive but as a word of caution you may find that when under full articulation and with some steering lock you may get some rubbing on the rear edge of the front wheel arch. If not doing serious off roading you won´t notice so depends on what you´re going to use it for.

cheers for the info so far.

I can see today where it is clearly catching the arms, the only bolt that looks like it may be a stop is this bolt arrowed
http://www.landyzone.co.uk/lz/attachment.php?attachmentid=55703&stc=1&d=1393269263

I wound it out a bit tried it on full lock and it bent the bolt upwards So if that is the correct bolt I need a stronger longer bolt