largest tyres for IFS LC100

Hi Robert,
I have 285x75x16 (33" ?) on an IFS LC100. No problems without a lift. At 35" your gearing and speedo will be noticeably affected.
Good luck

Legalities for most states, if not Australia wide, is no more than 15mm larger in diameter.

Above that I guess you would have to seek engineering approval.

Both replies so far are correct and really its up to you and how much money and work you want to do or stay within the law in which case you already have had a reply. Darren's (slee off-road)diff drop kit will help with keeping the drive shafts within acceptable tollerance and allow bigger tyres, one of the other problems associated with the bigger tyres is that they get wider as they get taller ie: from 270 to about a 315 when you get to a 35. You will find that you will need to find rims with a different offset or the tyres will rub while articulating. Darren I believe is looking into this and has already started using the rims of the lexus which have a different offset and is looking at other options from overseas. Do keep in mind that the taller tyre will take its toll on the gearing, not to bad on the level ground but much more effort going up hills and much less engine braking going down hills, not to mention the increase on the brake effort to stop the larger mass. Again this can be easily fixed by changing the ratios in the diff.
Hoped this doesn't put you off but good to know what to look out for if you go down this road.
Cheers Walter - MEL

Robert,

I have 305/70/16 Pro Comp muddies on my 100 series Ifs and have no major dramas with clearances to anything,only time it touches the fibre guard under the front end is at 15 psi on full lock on hard surfaces.otherwise no issues.cheers Paul