Spare Tyre Options for Australian GT

Gnome said:

OK here is where I am up to on my search.

Simmons do a 19 x 7.0 ET + 20 that they think will fit over the Brembos, I am organising a test fit with them. There is a 175/60 R19 tyre available from JAX tyres that should fit this rim.

Diameter of the tyre is 693mm compared to 703mm on the standard rear tyre, this equates to 740 revs per mile compared to 730 revs per mile on the standard one.
I have asked my dealer to fire off an email internally to Ford to get confirmation from them on what speed and distance limitations they would place on using wheels with this sort of diameter difference.

If all my measurements are correct this should just fit in the wheel well and the cover sit flush in the boot if the foam is removed from the back of the cover.


Now the painful part, the wheel will be $400.00 and the tyre $280.00 so not a cheap solution, but failing any other options becoming available I will be going down this path if it works, and I have one more who will also be doing it.

My question to the audience is, would anyone else be prepared to spend this amount for this? Maybe they can bring the price down a little if I was to order more than 2.

If anyone has any other suggestions let me know, but please don't pollute the thread with, "Ford should have a solution available for this from the factory type replies" we all know that, I am interested in numbers so I have something to work with when I go see Simmons.

Thanks

John

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Hi John,

I am interested in your spare wheel option.

Would the spare wheel fit in the spare wheel well, if it was left flat or partially inflated?

If required, it could be inflated by the provided compressor.

I live in southern Sydney.

My car is due to be delivered in July, (at this time).

If the wheel is guaranteed to fit the car and a reasonable fit in the spare wheel well, I would be prepared to buy before my car is delivered.

Graeme

Great pioneering work John!!!! My car is God knows how long away (dealer says Sept, being ordered in early Sept), but I'm thinking lucky by Christmas.

Just to confirm: you envisage this rim + rubber combo working for the the front AND the rear as a sort of emergency solution, i.e., to be used until you can safely replace the problematic tyre?

If so, I'd definitely be interested to purchase down the track. A lot cheaper than the rubbishy space saver for the EB owners, so I don't think the price unreasonable for a bit of peace of mind.

MC said:

Great pioneering work John!!!! My car is God knows how long away (dealer says Sept, being ordered in early Sept), but I'm thinking lucky by Christmas.

Just to confirm: you envisage this rim + rubber combo working for the the front AND the rear as a sort of emergency solution, i.e., to be used until you can safely replace the problematic tyre?

If so, I'd definitely be interested to purchase down the track. A lot cheaper than the rubbishy space saver for the EB owners, so I don't think the price unreasonable for a bit of peace of mind.

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Yes the plan is that it will work on the front and the rear. Ideally I was after a 6.0 or 6.5 rim, but the 7.0 may also just fit the depth. Simmons list a 6.5 but they don't seem to have it available to test. I will be doing a test fit tomorrow and then will know if this actually works. Then there are a few other things to check, such as how the diff will handle the small diameter difference and also load rating of the tyre and so on, but to be honest if it fits I will be taking one in any case as I am driving up to the back of Oberon to a mates place this weekend. Some of the trip is out of mobile range so I rather have something to get me out of trouble if needed.

Gnome said:

Yes the plan is that it will work on the front and the rear. Ideally I was after a 6.0 or 6.5 rim, but the 7.0 may also just fit the depth. Simmons list a 6.5 but they don't seem to have it available to test. I will be doing a test fit tomorrow and then will know if this actually works. Then there are a few other things to check, such as how the diff will handle the small diameter difference and also load rating of the tyre and so on, but to be honest if it fits I will be taking one in any case as I am driving up to the back of Oberon to a mates place this weekend. Some of the trip is out of mobile range so I rather have something to get me out of trouble if needed.

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Post up the pics of the wheels on your car I wonder if they will look good on the race red

Yuvraj said:

Post up the pics of the wheels on your car I wonder if they will look good on the race red

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He's just getting one for a spare Yuvraj. Putting an entire set of these Simmons would look pretty old-school. Wouldn't mind seeing it done.

On this whole not having a spare tyre in the GT, not having one means that you can't really do any Gran Turismo with confidence outside mobile range.

Here it is.
Simmons FR series wheel, it is not a 3 piece just looks like it, and hence the price. They could not do it in a 6.5 so I went with the 7.0, but I don't think it would have made much difference with the tyre fitted in any case. Just fits inside the wheel well but sticks up around 10mm proud of the boot floor, I am going to see if I can get some foam cut at an angle and ramp up the edges of the boot carpet so the cover sits in a bit better. Don't bother removing the foam on the back of the wheel well cover, it is that soft it didn't make any difference when I peeled it off, so I did not gain the 10mm I hoped for and now I have to glue it back on:doh:

Wheel was quoted to me @ $400.00, but I was given a deal as they were keen to get their hands on the car and take a heap of measurement on the brakes and so on to have on record for other customers. Also took a photo so they can put it up on their facebook page telling people that they have a spare wheel available for the 2015 Mustang.

Tyre was $250.00 so they are asking $650.00 incl GST.

Heaps of clearance on the calliper and being so narrow doesn't go anywhere near the strut. I will do a physical measurement of the diameter of the standard and the spare as they do vary a little from what the tyre size calculators say they are supposed to be, but there is no way a larger diameter is going into that wheel well. Well not pumped up in any case.

Ended up with all black so it doesn't stand out too much if I have to use it. It uses 19mm wheel nuts instead of the standard 21mm as they would not fit down the hole in the wheel, but they were thrown in, just need to make sure I get a wheel brace with both sizes on it. They could have machined out the holes to take the 21mm nuts but it would have made a mess of the wheel and been a hassle, I did not think it was such a big deal so did not worry about it.

Tempe Tyres have all the details on file and below is a clip of the machining details that I imagine any Simmons agent should be able to work from. Sam was the guy who looked after me and also the one that took all the measurements. For those interested I have his email address to save trying to explain it to someone else there, if you send an enquiry to Simmons via the website it still ends up with these guys as well. Contact details ;Sam Taleb email [email protected]


Cheers

John

Edit,
So far I do NOT have confirmation from Ford that using a wheel slightly smaller will not damage the LSD, but as the difference is so small I personally believe it will be OK for emergency use at reduced speed. However use this option at your own risk until Ford provide some written feedback on it.

Gnome said:

Here it is.
Simmons FR series wheel, it is not a 3 piece just looks like it, and hence the price. They could not do it in a 6.5 so I went with the 7.0, but I don't think it would have made much difference with the tyre fitted in any case. Just fits inside the wheel well but sticks up around 10mm proud of the boot floor, I am going to see if I can get some foam cut at an angle and ramp up the edges of the boot carpet so the cover sits in a bit better. Don't bother removing the foam on the back of the wheel well cover, it is that soft it didn't make any difference when I peeled it off, so I did not gain the 10mm I hoped for and now I have to glue it back on:doh:

Wheel was quoted to me @ $400.00, but I was given a deal as they were keen to get their hands on the car and take a heap of measurement on the brakes and so on to have on record for other customers. Also took a photo so they can put it up on their facebook page telling people that they have a spare wheel available for the 2015 Mustang.

Tyre was $250.00 so they are asking $650.00 incl GST.

Heaps of clearance on the calliper and being so narrow doesn't go anywhere near the strut. I will do a physical measurement of the diameter of the standard and the spare as they do vary a little from what the tyre size calculators say they are supposed to be, but there is no way a larger diameter is going into that wheel well. Well not pumped up in any case.

Ended up with all black so it doesn't stand out too much if I have to use it. It uses 19mm wheel nuts instead of the standard 21mm as they would not fit down the hole in the wheel, but they were thrown in, just need to make sure I get a wheel brace with both sizes on it. They could have machined out the holes to take the 21mm nuts but it would have made a mess of the wheel and been a hassle, I did not think it was such a big deal so did not worry about it.

Tempe Tyres have all the details on file and below is a clip of the machining details that I imagine any Simmons agent should be able to work from. Sam was the guy who looked after me and also the one that took all the measurements. For those interested I have his email address to save trying to explain it to someone else there, if you send an enquiry to Simmons via the website it still ends up with these guys as well. Contact details ;Sam Taleb email [email protected]


Cheers

John

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Thanks John for all your research and groundwork.

I will probably go down this track.

Do Tempe Tyres have stock of these wheels?

If the tyre was to be fully deflated, would it fit any better into the wheel well?

Is there any fixture in the wheel well to hold the wheel in place or does it just sit in there?

Thanks again
Graeme

[MENTION=19128]Gnome[/MENTION] so the only thing left is to receive confirmation from Ford that this won't upset the LSD?

Thanks John, for all the grunt work...I think I'll be pursuing this option as road trips outside of the metro area are part of my plans so appreciate your efforts.

Red Stang 302 said:

Thanks John for all your research and groundwork.

I will probably go down this track.

Do Tempe Tyres have stock of these wheels?

If the tyre was to be fully deflated, would it fit any better into the wheel well?

Is there any fixture in the wheel well to hold the wheel in place or does it just sit in there?

Thanks again
Graeme

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Tempe had it in stock, don't know how many more they had, takes a couple of hours to machine the blank so you cant just rock in and pick one up off the shelf I was there for a while, sorting it out. But now they have what they need I guess you could order it in advance, probably have to pay up front as it is a custom wheel essentially.

Rim and tyre are same height so deflating wont help.

Yes there is a fixture that holds the (cough cough) "mobility kit" but the existing bolt did not reach up to the wheel, this is another thing I need to sort out as well as a jack, wheel brace and basic tool kit.

G RUSH said:

@Gnome so the only thing left is to receive confirmation from Ford that this won't upset the LSD?

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Yes still waiting on that, have asked my dealer to get something in writing but as this is the largest diameter that fits the wheel well I went with it as there is not really anything that will be closer to the rear standard diameter. There is a whole section in the manual about using dissimilar sized wheels and not going over 80 km/h , but as this wheel didn't come with the car from Ford I guess you could not use that as an argument if something did happen to the diff. Personally with the small difference in diameter I don't think it will hurt for short distances at a reduced speed, it is only a few rpm per km difference in the two wheels but I am not going to guarantee that, hopefully Ford do.

The other interesting thing is that the manual mentions that if you use the sealant in the mobility kit it could damage the tyre pressure sensor, and that after using it you MUST have the sensor replaced, so you are screwed either way. Get a flat and use the mobility kit you have to replace the TPMS sensor $$$, or call a tilt tray $$$, or damage the diff $$$.

But your question is valid and I have not forgotten about that point and will update when I hear from them.

I am interested in the solution - but am in WA, so might be impractical to go through the same vendor.

Thanks for all the work you have done.

Ian

Ques for those with a GT - any idea if a 19" rim from an ford g6e turbo would fit over the brembo caliper ?

I just sold my g6e - yes even though the stang hasn't been delivered yet - and kept the spare alloy wheel (currently selling separate) . That said I might keep it if I can use it as effective spare


I'm Not too concerned about it being flush in the shallow well as long as it fits inside the diameter and will clear the front caliper???

More than happy for anyone to try my spare as a test if they are near the northern subs of melbourne

steerage250 said:

I am interested in the solution - but am in WA, so might be impractical to go through the same vendor.

Thanks for all the work you have done.

Ian

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They seem to ship across Australia, or at least I see people saying things were shipped to Canberra and Melbourne. I would give them a call if interested.

My car is a way off (Sept at earliest, and that extremely doubtful) and I'll see how others get along before making a final decision, but this seems to be as good as you'll get for now - unless Ford actually come up with an 'official' solution in the months ahead, which I strongly doubt.

I think this is a must have. If you've had a severe blow out (collapsed side wall or such like) and they drag your car on and off a flat bed, just think of the damage that might be done to the underneath of the car as it hits the bottom as they get it on and off. The give RACQ/NRMA/RACV a call or whatever sounds good in theory, but they surely can't guarantee that they won't damage your car recovering it.

Not having a spare for the GT is a big fail from Ford if you ask me.

Thanks again to John!!!! :clap2:

Gnome said:

Yes still waiting on that, have asked my dealer to get something in writing but as this is the largest diameter that fits the wheel well I went with it as there is not really anything that will be closer to the rear standard diameter. There is a whole section in the manual about using dissimilar sized wheels and not going over 80 km/h , but as this wheel didn't come with the car from Ford I guess you could not use that as an argument if something did happen to the diff. Personally with the small difference in diameter I don't think it will hurt for short distances at a reduced speed, it is only a few rpm per km difference in the two wheels but I am not going to guarantee that, hopefully Ford do.

The other interesting thing is that the manual mentions that if you use the sealant in the mobility kit it could damage the tyre pressure sensor, and that after using it you MUST have the sensor replaced, so you are screwed either way. Get a flat and use the mobility kit you have to replace the TPMS sensor $$$, or call a tilt tray $$$, or damage the diff $$$.

But your question is valid and I have not forgotten about that point and will update when I hear from them.

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Hi John, sensational stuff, thanks again.

Yeh I don't ever recommend using the sealant shit, it gets all over your rim, is hard to take off afterwards, just a general nightmare. Not guaranteed to work, won't work in all situations etc.

And the TPMS replacement is just a slap in the face!!!

Happy to proceed at 80 km/h if something happens anyway, you shouldn't be driving any faster on a wagon wheel anyway