Thread: 245 75r16's on a manual TD5 Disco

Where did you hear about the law change? I reckon you'd be better off getting a chip rather than doing the diff ratios for thy size tyre.

I called QLD Transport and spoke to a gent at the modifications sections asking if they accepted Certified Engineering work conducted in states outside of QLD and therefore allow me to roadworthy a modified veh in QLD. Short answer yes but only on a case by case basis providing the modifications where not to extreme. While talking the gent from the modifications section I was asked what mod's I was looking at and I was then told that new legislation would be released in Nov this year so it may pay to wait until the change if what I mainly wanted to do was fit larger tyres.

I've run 245 75r16's since new so don't really know exactly the difference but the taking off on anything other than almost flat you need to get the revs up first before you engage the clutch. If I am towing, I usually use the hand brake when stopped and, before taking off, give the accelerator a second's blip to get the turbo spooled up. With that technique I have no problems and the extra clearance is definitely worth it.

I rechipped the ECU which also made a big difference by increasing the oomph at low RPM. Main problem is that, with those larger tyres, the odometer and speedo will now under read by 5% unless you put in one of those speed adjusters (there are lots of posts on this), which means you need to be careful with speed traps etc.

Someone sent me a PM last night about this thread but when I came to reply today, it's disappeared (ie can't find it in my inbox). Whoever it was, if you want a reply, please resend.