Wheel size and Tyre question

Submitted: Thursday, Aug 21, 2008 at 21:01

ThreadID: 60966 Views:4512 Replies:5 FollowUps:7

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Member - Porl

Well yes dumb question but I'd rather go to a dealer without needing to ask the truly dumb question.

My hilux has aftermarket wheels and tyres, but these are different from the spare (damn). So I am trying to work out what size tyre I can fit on the wheels. The spare is a 16" with a Bridgestone Dueller on it.

The actual wheels on the lux are aftermarket alloys and the tyre markings are 31x10.50 R15 - now that tells me it is a 15" tyre, so question is, does that mean it's a 15" wheel which I'd find weird but then I can't find info that tells me if this tyre fits on what I hope is a 16" wheel so I can standardise with my spare.

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Reply By: Member - Troll 81 (QLD) - Thursday, Aug 21, 2008 at 21:05

Thursday, Aug 21, 2008 at 21:05

Yes it's a 15inch wheel if you had a 16 it will be something like 285X75R16

AnswerID: 321599

Follow Up By: titl4 - Thursday, Aug 21, 2008 at 21:23

Thursday, Aug 21, 2008 at 21:23

Maybe a 265 x 70R16 would be closer

FollowupID: 588457

Follow Up By: Member - Troll 81 (QLD) - Thursday, Aug 21, 2008 at 21:57

Thursday, Aug 21, 2008 at 21:57

I have a 285x75 on my 16's

FollowupID: 588478

Reply By: Bonz (Vic) - Thursday, Aug 21, 2008 at 21:29

Thursday, Aug 21, 2008 at 21:29

Theyre not 15" tyres, theyre 31" tyres on 15" rims. 31 x 10.5 R15 means 31" outside diameter, 10.5 inches wide R for Radial and 15 for 15" rims.

If your spare rim is 16" you'll need 265/75 R16 tyres which are also 31" tyres.

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AnswerID: 321603

Follow Up By: Member - Porl - Friday, Aug 22, 2008 at 08:08

Friday, Aug 22, 2008 at 08:08

Ok, so are we saying 265/75 R16 tyres fit on a 15" rim or are you saying if I want to standardise I got to get rid of the 4 wheels, or the change the spare, and the respective tyre/s.

thanks

FollowupID: 588526

Follow Up By: Mark S (cns) - Friday, Aug 22, 2008 at 10:12

Friday, Aug 22, 2008 at 10:12

Porl

"Ok, so are we saying 265/75 R16 tyres fit on a 15" rim...."
No

"if I want to standardise I got to get rid of the 4 wheels...."
No

"or the change the spare, and the respective tyre/s...."
Maybe yes

Let me get this straight
You are happy with the current 4 wheels & tyres on the vehicle (with 15" rims) but want to make sure the spare is compatable with these 4 ?
If so, then Bonz gave you ther answer above.
The only thing that would stop you putting a 265/75R16 on your spare is if the spare is a skinny split rim. A 265/75R16 would most likely be too wide for this type of rim.
If this is the case, better off getting a second hand 15" rim and tyre that is the same as the current 4 on the vehicle.

Tried to keep it simple for ya, hope it helps

Mark

FollowupID: 588544

Follow Up By: Bonz (Vic) - Saturday, Aug 23, 2008 at 08:36

Saturday, Aug 23, 2008 at 08:36

No anywhere you see 14 15 16 17 18 19 20 etc thats the rim size

15" rims need 15" tyres

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FollowupID: 588708

Reply By: Towie - Friday, Aug 22, 2008 at 08:42

Friday, Aug 22, 2008 at 08:42

You have to stick with R15 or change all your rims to R16.. A sixteen inch tyre wont go onto a 15 inch rim..
When talking to the shop man you want 265 width - 75 % of width as side wall depth and R15 is a 15 inch rim.... or take it in tell him to go look at it and measure it to see what will fit....
I recently found that a 305 tyre would go on my 16 inch rims which i thought impossible... they are the experts so let them work it out.... cheers

AnswerID: 321666

Follow Up By: Member - Porl - Friday, Aug 22, 2008 at 10:04

Friday, Aug 22, 2008 at 10:04

OMG i bought a ute with a spare wheel different size to the rest of the four carrying me, now to find a rock to hide under and renew my membership in a different name ...

FollowupID: 588542

Follow Up By: HGMonaro - Friday, Aug 22, 2008 at 10:58

Friday, Aug 22, 2008 at 10:58

while the wheel my be of a different diameter (16" vs 15") withthe correct tyre you can still have the same overall diameter (or very close). Having said that, I'd be finding a 15" wheel and matching tyre.

FollowupID: 588554