Use of bigger tyers

[gazza 1]

Gooday, Help needed, i am currently using 265x75x16" cooper tyers and thinking of upgrading due to the ware factor. Can i go upto say 285x75x16"
with out worrying about diff ratios or loads etc. Thanks in advance,
Gazza

[351ciofgrunt]

Yes you can, you will notice some sluggishnes due to the increase in your final drive ratio but not really great enough to warrant a diff ratio change.

Ware factor?

[thehanko]

Gooday, Help needed, i am currently using 265x75x16" cooper tyers and thinking of upgrading due to the ware factor. Can i go upto say 285x75x16"
with out worrying about diff ratios or loads etc. Thanks in advance,
Gazza

ware factor? assumming you mean wear factor? which i think you mean a bigger tyre has greater circumference and should last longer?

ok if your trying to be more efficient a 285 will give you 6% more circumference and cost more than 6% more to buy. It will also use more fuel.

so in short if your doing it to be $ efficient then your barking up the wrong tree.

But yes a patrol will run a 285/75/16 without any major issues, it will effect your power and ecconomy a little, it will effect your speedo and odo by 6% etc.

this difference is only minor so diff ratios etc will not need changing.

but yes you can.

[DamTriton]

Overall 30mm change in diameter, same as new tread to worn out, increase of 30/803mm = 3.7% from standard. RN wouldn't be able to ping you in Melbourne for being over the limit at an indicated 60 km/h.

[alien]

yup - assuming your coopers are ST or STT, change to a highway terrain tyre (road tyre) and retain the factory size - this would see you getting far improved tread wear and economy... however it will also leave you travelling pretty much exclusively on the road.

[gazza 1]

G'day all,sorry what i meant by wear factor was my tyres are wearing out, so need replacing soon. I did want to continue 4x4 work with what ever tyre i go for. Mind you i suppose 4x4ing = 10% and daily drive the remainder. I must admit i am very disappointed with the coopers st. the way they deteriorate quite quickly on rocky terrain, the chunks just seem to fly off. I had Hercules terratracs previously with no problems. I think from memory they were 3 or 4 ply side walls compared to 2 ply on the Coopers. Anyway, are you guys recommending not to go the bigger tyres when 4x4ing, but other wise ok for the daily drive.
Thanks Gazza

[alien]

i ran STTs for ages (cooper also) and passed my lane change test with them on... they hardly wore too... perhaps the ST you had was a bad batch or your pressures were out?

Otherwise - check out the tyre topic index, theres a lot of tyres there with people's opinions.

[gazza 1]

Gooday, me again thanks all for your advice i wiil give it ago.
Thanks again Gazza