Is this size tyre okay as a spare for my Hilux 4x4?
Submitted: Saturday, Dec 03, 2011 at 08:49
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Monomeeth
Howdy all,
I recently got 4 new Yokohamas for my Hilux 4x4. The tyres, as per manufacturer's specs, are: 255/70 R15.
However, my spare tyre is currently an old Coopers tyre I previously had on the car, but since this uses the older imperial measurements, the size is 31x10.5 R15.
Now, when I had all Coopers tyres on my car that was fine, but now that I have 4 Yokohamas with the metric 255/70 R15 measurement on the car, I am wondering whether the Coopers imperial 31x10.5 R15 is going to cause a problem as a spare tyre, because the rolling radius, diameter and circumference will be different?
Also just curious as to whether it would only be a problem on-road as to off-road. In other words, what I'm asking is whether this tyre is safe to use as a spare at all times and, if not, whether it's safe to use as a spare when off-road only?
Hope this makes sense!
:)
Reply By: Athol W - Saturday, Dec 03, 2011 at 09:14
Saturday, Dec 03, 2011 at 09:14
Monomeeth
I would avoid using this tyre on your vehicle if at all possable, and certainly never whilst in a 4wd situation. The OD of your new tyres 255/70r15 is 739mm wilst the 31-10.5r15 has on od of 778mm. The only time I would use this as a spare would be for a short distance in 2WD and only if fitted to a front wheel, as fitting it to the rear will destroy the limited slip diff in a very short time/distance.
Hope this helps
AnswerID:
471618
Reply By: Member - nick b - Saturday, Dec 03, 2011 at 09:15
Saturday, Dec 03, 2011 at 09:15
I think you need to get another tyre ,this is to big a differance in 4x4 or on the back , maybe ok for a short spell, you will get big wind up in trans , unwise to use.
cheers nick
AnswerID:
471619
Reply By: Member - Craig F (WA) - Saturday, Dec 03, 2011 at 12:51
Saturday, Dec 03, 2011 at 12:51
Why do we carry spare tyre??? so when things go to S$#T we can get out of trouble. Until then you will never need it. But when you do!
Recovery equipment and spare tyres are # one on my list. Cars need 5 good tyres not 4.
Second thing is when you do need it you dont need the lecture from the better half of why did you buy XXX instead of a proper spare.
Regards
Craig
AnswerID:
471627
Reply By: desray (WA - Saturday, Dec 03, 2011 at 21:36
Reply By: Bill BD - Sunday, Dec 04, 2011 at 18:31
Sunday, Dec 04, 2011 at 18:31
Having just tried something similar in my jeep I can assure you it is a terrible idea. You get diff wind-up very quickly. Then you can't get out of 4WD. I went back, forward, backwards circles, forward circles, crying, wailing, etc. Fortunately the jeep has a on road 4wd function and I drove it
home on that. It didn't like it though. It took quite a while to settle down.
AnswerID:
471695
Reply By: Monomeeth - Sunday, Dec 04, 2011 at 21:17
Sunday, Dec 04, 2011 at 21:17
Hi Everyone
Thank you so much for your responses. Tomorrow I will be replacing the Coopers Tyre from my spare wheel with another tyre.
Thanks again!
:)
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471709