Tyre size
Submitted by Shane O on Tue, 2017-10-31 21:32
I have these size tyres on my jeep and will need new ones soon.
the size I have is 245/65/r17 and was wondering if the following
size would be ok.
245/75/r16. The car does have a 1 inch lift
scano
Posts: 1246
Date Joined: 31/05/07
Are you replacing all of them at once?
If so, the slightly higher profile will be fine. If you were thinking of only changing 2 tyres, you will run into major dramas with the centre / active differential should it be 4wd. In summary, make sure all 4 tyres are exactly the same size and your will be fine.
scano
MyDisco2
Posts: 102
Date Joined: 28/06/17
No they wont fit - Rim Size
Gday, unless it's a typo they wont fit as the "R" is for rim size, and you'd be trying to put a 16" tyre on a 17"rim.
The first dimensions are for width (245 wide) then height of the rubber (75) which generally doesnt matter a great deal but not sure with your 1" lift as not familiar with Jeeps.
Cheers,
Disco.
resurgence
Posts: 573
Date Joined: 23/04/14
R is for Radial
Actually the R means it’s a radial construction tyre, but your point is still valid, unless he’s changing rims they won’t fit.
MyDisco2
Posts: 102
Date Joined: 28/06/17
Roger that..
Well there you go, I always thought it was R for Rim size not construction type, thanks for the heads up.
resurgence
Posts: 573
Date Joined: 23/04/14
You could upsize
Assuming you are sticking with 17” rims you could go up one size to 245/70/R17. One inch taller overall which would lift the car by half an inch. Legally you can lift the car teo inches overall.
Shane O
Posts: 926
Date Joined: 22/01/10
all tyres
going to replace all 4 tyres, just saw the others on a facebook page an thought they might be ok but will go with the above 245/70/R17
scano
Posts: 1246
Date Joined: 31/05/07
Agreed with above
Forgot to read the fine print and seen just now that the Tyrepower size was 16 inch, instead of being 17 inch.
definately wont fit on 17 inch rims
boora
Posts: 43
Date Joined: 10/02/13
Cheap tyres and rims
Shane- your post reminded me of the jeep tyres I have had sitting in my shed left since I sold my jeep ( Grand Cherokee)
i mucked around with different combinations and still have 4 x 16" inch rims with tyres with minimal tread. I'd take $100 for the set to move them on. i also have 2 x 17" unused tyres on rims (one Michelin 235/65/r17 and one Goodyear Wrangler 245/65r17)that may be of more use if sticking with the 17 " size even if you keep as spares as I don't want much for them.
PM or ring me on 0403558791 if of any interest to you.
Shane O
Posts: 926
Date Joined: 22/01/10
tyres
hey boora
i'll find out what size we will go with first, i'll keep you in mind for the spare goodyear wrangler. where are you located mate
D_d_001
Posts: 1522
Date Joined: 09/03/13
plug your tyre size into here
plug your tyre size into here and compare with others
https://www.exploroz.com/vehicle/tyres/sizecalc.aspx
the 245 is obviously the width
the 65 is the percentage width of height ie 65% of 245mm
and as others have said the 16 is rim size.
so for example you may want to go for something like 235 70 16s. which may give you a similar rolling size tyre.
if you 4x4 a lot sometimes its better to have a higher % wall height ie 70 or 75%
and remember as a rule of thumb for every inch you go up is tyre diameter you loose about 4% torque. (not something to take lightly if you tow a boat or heavy trailer)
start going up too much in tyre height and your car will perform like a slug and use a heap more fuel.
kknlk
Posts: 200
Date Joined: 30/12/08
Shane, shouldn't you put
Shane, shouldn't you put your question to the Jeep forum?
pelagicyachts
Posts: 1299
Date Joined: 23/02/11
another wee thing to remember
another wee thing to remember is when you increase rolling diameter it throws your speedo out - which is probably fine around town - but my bro-inlaw just got a mulitnova fine for 116 in 110 zone
naughty naughty of course but my point is you need to be aware what % it may alter the speedo
if you google there are a few websites that have a rolling diam calculator where you can compare sizes to see how much diff the rolling diameter is
sea-kem
Posts: 14853
Date Joined: 30/11/09
Just about to go through
Just about to go through this exercise of increasing the height of my tyres and a mate told me that same thing as he has done his. I'm going for Cooper STMax. Will also be raising suspension about 30mm.
Love the West!
resurgence
Posts: 573
Date Joined: 23/04/14
Speedo
Good point to keep in mind.
These days speedos are generally calibrated to read about 5km/h under at highway speeds. I found on my Prado and now on the cruiser when I went up a tyre size my speedo now reads dead on (as checked with GPS).
Shane O
Posts: 926
Date Joined: 22/01/10
Tyres
thank you for the info, think we will just stick with the same size Tyre.
as always this forum is way better than any other :)
Dale
Posts: 7930
Date Joined: 13/09/05
Try tyre sales online, generally pay 3/4 the price normally. I just bought new rubber for my Ute, come in just over a grand but about $300 cheaper still that normal tyre shops. Fitting etc is all in the price, just nominate where you want them fitted.
"Just because you are a Character, Doesn't mean you have Character."
Mr Wolf
Shane O
Posts: 926
Date Joined: 22/01/10
Site
what website is that one
Dale
Posts: 7930
Date Joined: 13/09/05
www.tyresales.com.au
"Just because you are a Character, Doesn't mean you have Character."
Mr Wolf
piston broke
Posts: 776
Date Joined: 05/11/08
Thanks Dale
that site is awesome cheers Pete.
Doc
Posts: 691
Date Joined: 29/05/16
Interesting web site, wish I
Interesting web site, wish I had have seen it before outlaying a heap this week on super singles for our motorhome.
Darren253
Posts: 570
Date Joined: 23/07/16
www.tyresales.com.au
I used them for my cruiser tyres...
Ended up being $400 cheaper than a quote from the exact same tyre shop that ended up doing the fitting via Tyresales website booking.
bradz
Posts: 693
Date Joined: 29/10/07
Torque
It may not be a big issue to you but if you increase your rolling diameter, even by a relatively small amount it does have a rather large impact on the torque your engine can get onto the road. I recall seeing a dyno readout from a 4x4 which switched from 265/75/16's to 285/75/16. Dropped about 20% torque. Wouldnt have believed it if I hadnt seen it in the numbers.
I did then the best that I knew how. When I knew better, I did better.
resurgence
Posts: 573
Date Joined: 23/04/14
Not exactly
The amount of torque produced by a force is proportional to the distance, in other words the radius or diameter. So if you double the radius you double the torque.
Increasing the diameter of the tyre by one inch is about a 3% increase in radius, which in turn will produce a 3% decrease in torque applied by the wheel.
Shane O
Posts: 926
Date Joined: 22/01/10
torque
do really need it the car has only been a tarmac queen lately and not towing anything