Spare tyre

[Bantam]

The spare wheel 18 inch from the Wheel Shop has arrived and fits in the boot fine. It came with the tool kit which was worth the money extra £20 Jack ,with ratchet raising bar, wheel, brace extending chrome type and 2 sockets that have 4 different nut sizes 2 on each socket.
The jack is rated at 3 tons and it has a rubber locating block cut to shape so it fits either side of the sill seam. Looking at it makes me think that I need to carry a rubber locating block for this type of sill ( like BMW do) so the sill seam is not crushed by a trolley jack if the time arrives one is used to lift the car.
Looking under the car there is no place to put a second jack as the underneath is completely covered with shielding, so it looks like its the sill points for a 4 post lift. or an extra scissor jack if you want a bit extra support on a wheel change, I've got a second jack in the boot they both fit either side of the spare wheel.
I've put 2 climbing slings across the spare from each anchor point in the boot X shape across the wheel as there is no way to hold the wheel to the boot floor, the boot floor fits fine across the wheel as if there was nothing underneath and the items tray for the goo and air pump can still stay in position.
Have measured the bolt holes with a Vernier caliper with nuts in place and the distance between 2 points is the same as the wheels on the car and the spare is dished so the caliper will fit but when the weather is better will try it out on the front first.

However, if you are still not convinced:

'Honestly darling you don't expect me to fix that wheel with my best sports jacket and trousers on!!' I can hear Raymond Baxter commenting on this invention although I don't think some how he would be impressed!!

 

[shadowman]

The spare wheel 18 inch from the Wheel Shop has arrived and fits in the boot fine. It came with the tool kit which was worth the money extra £20 Jack ,with ratchet raising bar, wheel, brace extending chrome type and 2 sockets that have 4 different nut sizes 2 on each socket.
The jack is rated at 3 tons and it has a rubber locating block cut to shape so it fits either side of the sill seam. Looking at it makes me think that I need to carry a rubber locating block for this type of sill ( like BMW do) so the sill seam is not crushed by a trolley jack if the time arrives one is used to lift the car.
Looking under the car there is no place to put a second jack as the underneath is completely covered with shielding, so it looks like its the sill points for a 4 post lift. or an extra scissor jack if you want a bit extra support on a wheel change, I've got a second jack in the boot they both fit either side of the spare wheel.
I've put 2 climbing slings across the spare from each anchor point in the boot X shape across the wheel as there is no way to hold the wheel to the boot floor, the boot floor fits fine across the wheel as if there was nothing underneath and the items tray for the goo and air pump can still stay in position.
Have measured the bolt holes with a Vernier caliper with nuts in place and the distance between 2 points is the same as the wheels on the car and the spare is dished so the caliper will fit but when the weather is better will try it out on the front first.

As a matter of interest, what centre bore is in the wheel? And what tyre is fitted ?

 

[TimothyN]

I wonder why they told me it had to be 17”?

 

[Bantam]

More info on the spare wheel tyre T125/70R 18 99M. make LINGLONG rim 57mm/112 car wheel hub hole in the middle 57mm/112 measured with Vernier caliper.
'Wheel shop' asked for registration number and said hub same as the MGZS 2024 /2025. the wheel was £139.95 with the tool kit £159.95 free delivery, the tool kit was well worth the extra £20.

Have found jacking pucks on eBay with a slot in the center for the sill strip for £5 worth buying and carrying with you. 112 is the stud the pattern is described as 5 112, full info is on their web site

The tyre looks well made tread is a bit thin but looks par for the course on a space saver and I suppose it could be rare that you would want to travel a great distance on it but needs must I suppose depends on time of day or night.
When I have chance next week will jack up the car and try the wheel on the hub.
Cheap Spare Wheels & Space Saver Wheels - Thewheelshop.co.uk for full info.

 

[Alb]

LINGLONG is a very low quality make but perhaps that doesn't matter for its intended use.

 

[salty]

LINGLONG is a very low quality make but perhaps that doesn't matter for its intended use.

Linglong is a budget tyre. Not necessarily low quality. And perfect for your use.

 

[Lovemyev]

More info on the spare wheel tyre T125/70R 18 99M. make LINGLONG rim 57mm/112 car wheel hub hole in the middle 57mm/112 measured with Vernier caliper.
'Wheel shop' asked for registration number and said hub same as the MGZS 2024 /2025. the wheel was £139.95 with the tool kit £159.95 free delivery, the tool kit was well worth the extra £20.

Have found jacking pucks on eBay with a slot in the center for the sill strip for £5 worth buying and carrying with you. 112 is the stud the pattern is described as 5 112, full info is on their web site

The tyre looks well made tread is a bit thin but looks par for the course on a space saver and I suppose it could be rare that you would want to travel a great distance on it but needs must I suppose depends on time of day or night.
When I have chance next week will jack up the car and try the wheel on the hub.
Cheap Spare Wheels & Space Saver Wheels - Thewheelshop.co.uk for full info.

I guess you have been supplied a 18” rim shod with a suitable sized spacesaver tyre to suit.
The S5 LR Trophy has 18” rims as standard, as you know, so I guess that using a 18” steel wheel and suitable tyre should ( when put along side your rear wheel fitted to the car right now ) should be close in overhaul height.
Maybe just a little bit taller of course, because there is no weight on the spacesaver.
I have the original MG OEM space saver wheel from our previous ZS EV in the boot of our S5 but it’s only a 16” rim.
Although it will fit okay, because the hubs on the ZS EV and S5 have the same centre hole size and wheel bolt hole pitches, it obviously lacking in height when put along side the wheel on the car right now.
I have a concern that if found a need to fit the wheel from the ZS EV, when driving the car it would not be happy !.
The rotation speed of that 16” wheel would differ a lot from the other three 18” wheels still on the car.
This is very likely that the ABS system would be throwing up all sorts of warnings, bings and bongs and logging them in system of the cars modules.
Would you mind checking your new spacesaver against the rear wheel on the car, to see if the overhaul height is the same please ?.
I may reluctantly have to consider upgrading to the 18” rim to achieve this though.
It would be very interesting to know if the car detects any issues when you test drive with the spacesaver fitted ?.
I fully expect it to pick up an issue with the tpms system, as the original wheel is not on the car, but this should resolve itself when you refit the factory 18” rim.
It will need a short drive around the block for the tpms to detect the wheel and relearn the system.
Many thanks !.

 

[Slumppy]

This may have been covered before. I have just purchased a new MGS5. The important consideration for a spare wheel is the PCD (Pitch circle diameter), centre bore and rim diameter +/- 1" of the original. This being PCD 5x112 and has a bore 57.1mm.
The VW group of vehicles use the same sizes. I just purchased an 18" space saver from an Audi A3. Fits perfectly under the boot floor (highest position). It also clears the front discs. The items in the brown bag are a jack and a wheel brace. Hope this is of help.

PCD 5x112 57.1 wheels -Wheelfitment.eu | PCD, Offset, Center Bore, mounting and tire size data

Wheelfitment.eu 5x112 naaf 57.1 Search by PCD - de grootste database met velgen steek, ET waarde, naaf diameter, montage en bandenmaat voor vrijwel iedere auto

www.wheelfitment.eu

 

[MG Clive]

Thanks @Slumppy, it's good to know the VAG space saver fits the MGS5.

 

[Bantam]

Interesting question if you have an axle with a wheel on each end and the 'diff' rotates each half axle at the same speed why would this effect a smaller wheel on one end ? YES just got it now the diff will turn one half axle quicker because of the smaller wheel so the abs will think its in a skid mode??? This would be the same for the front the hub with the smaller wheel will turn faster.
Have checked the 18inch space saver diameter it is 2 cm less in diameter than the standard road wheel. All space savers must be like this Can you turn off the abs ? but really why worry as long as it solved a problem short term of a puncture and gets you to a garage. But there is a chance the abs will be upset Must happen on other vehicles so any info from Audi VW BMW ?? about this ?

If you don't like the LINGLONG tyre Continental do a 17inch tyre for £60, no 18inch on their list must be other makes? but the LINGLONG has enough tread for at least a good distance How many miles can you drive on each 1mm of tyre tread? on a normal tyre 2 maybe 3 thousand miles?

 

[Lovemyev]

Thanks @Slumppy, it's good to know the VAG space saver fits the MGS5.

Just remember, if you intend to use a VAG spacesaver on your MG - you will need to carry 4 x Off VAG wheel bolts to be use when that wheel is required.
Why, because the countersink differs between VAG and MG.

 

[Lovemyev]

Interesting question if you have an axle with a wheel on each end and the 'diff' rotates each half axle at the same speed why would this effect a smaller wheel on one end ? YES just got it now the diff will turn one half axle quicker because of the smaller wheel so the abs will think its in a skid mode??? This would be the same for the front the hub with the smaller wheel will turn faster.
Have checked the 18inch space saver diameter it is 2 cm less in diameter than the standard road wheel. All space savers must be like this Can you turn off the abs ? but really why worry as long as it solved a problem short term of a puncture and gets you to a garage. But there is a chance the abs will be upset Must happen on other vehicles so any info from Audi VW BMW ?? about this ?

If you don't like the LINGLONG tyre Continental do a 17inch tyre for £60, no 18inch on their list must be other makes? but the LINGLONG has enough tread for at least a good distance How many miles can you drive on each 1mm of tyre tread? on a normal tyre 2 maybe 3 thousand miles?

I think there is a pretty good chance that the ABS system will detect that the spacesaver is turning faster than the other three factory full sized wheels on the car.
I doubt you will be able to turn off the ABS myself ?.
I am not sure about the TPMS sensors on the MGS5 though ?.
On the ZS EV's models, the sensors are located in each one of the wheel rims and it reads the value and sends it back via module in the car.
However, the TPMS system on VAG models uses the ABS system directly to detect the tyre pressure values, by measuring the different rotation speeds of each wheel.
So when the tyre carrying the lower pressure and the rotation speed of the wheel, then triggers the low pressure warning to the driver.
Based on this IF the MGS5 is the same system as the ZS EV ( and it could be ) the ABS may not be affective by the smaller wheel, but it will therefore miss the reading not being sent by the missing TPMS sensor in the spacesaver wheel surely ?.
Either way, the car is likely to ping up some type of issue .
I guess by using the 16" spacesaver wheel from the ZS EV and not the larger 18" rim and tyre with only a 20mm difference, it may limit any faults being logged by the car .
I am thinking that I may upgrade to the 18" wheel and tyre then now, as the 16" set up is going to be a bit too much of a difference.
What are your thoughts on this ?.

 

[Alb]

The size of the wheel is not really relevant.
What matters is the diameter of wheel plus tyre, so smaller wheel paired with a suitable profile tyre can equal the diameter of the original setup.

 

[Lovemyev]

Agreed, but when you are switching from a 16” rim to a 18” rim, then I very much doubt that this much of a differential in wheel diameter, can be recovered in the side wall of another tyre ?.
17 to 18 maybe, but 16 to 18 is a big ask I think.
If it could, then I could explore the possibility of switching / upgrading the tyre with a larger side wall and still retain my original 16” ZS EV rim.
If not, bite the bullet on the 18” combo and sell the 16” unused MG OEM wheel & tyre.
I do carry a Holts repair can as well, but I do like carrying a spare tbh.
Carried it for five years and never needed it, but I am happy to lug it around just in case.

 

[MG Clive]

Just remember, if you intend to use a VAG spacesaver on your MG - you will need to carry 4 x Off VAG wheel bolts to be use when that wheel is required.
Why, because the countersink differs between VAG and MG.

Interesting, I've just had a search around the interweb, and I can't find anything other than the taper on both Audi and MG is 60°, but it wasn't an extensive search?

 

[salty]

Agreed, but when you are switching from a 16” rim to a 18” rim, then I very much doubt that this much of a differential in wheel diameter, can be recovered in the side wall of another tyre ?.
17 to 18 maybe, but 16 to 18 is a big ask I think.

Actually you can 16" to 18" is no problem.
Had a VW Lupo once, went from 14" to 17" and lowered, with no problems.

 

[Lovemyev]

The main aim of increasing the size of the rim from a standard spec, is solely because you have decided to increase the cars handling etc.
The larger rims, are normally wider in there depth, this then allows the fitment of tyres with a greater tread surface, meaning increased grip in the dry and better handling.
Not the case in the snow of course.
Reducing the tyre profile size also increases the handling, but means that the ride quality will suffer, because the reduced depth of the profile, will make the ride harder.
You reduce the profile in order to retain the same overall finished height diameter, when the two wheels are placed back to back, off the car.
Achieving the same height, will mean that the speedo returns the correct speed indicated as before.
The MG OEM spacesaver from the ZS EV is 16” and the emergency tyre size has been calibrated by MG to achieve the same finished running height as the 17” factory alloy with a lower profile - great !.
The MGS5 has 18” rims fitted as factory fit.
So, although the fitment of the 16” from the ZS EV wheel onto the hub and wheel bolts are the same, up sizing the rim two sizes from 16” to 18” it’s likely that finding a tyre with a profile high enough is going to very difficult I think.
Hence the need to use a larger rim.
Hope that makes sense .

 

[Alb]

My Ford Focus had 19" wheels and a 16" Space Saver spare.

 

[Lovemyev]

Interesting, I've just had a search around the interweb, and I can't find anything other than the taper on both Audi and MG is 60°, but it wasn't an extensive search?

There is two different types of wheel bolts from VW to MG I will try a find a photo.
Update :- This was covered on the ZS EV page and a forum member uploaded a photo of the two bolts side by side.
I am unable to locate it right now, but I have uploaded a picture of a VW bolt on sale on eBay and one of my locking bolts from my previous ZS EV.
It’s not the greatest shot, but you can see that style of bolt for the MG is steeper than the more half rounded shape of the VW bolt.
The top photo is the VW bolt.

 

[Ian Key]

My Ford Focus had 19" wheels and a 16" Space Saver spare.

Mine did too which is why you were limited to 50 mph and 50 miles of range.

There is a difference between a space-saver wheel and a spare wheel. Space-savers are only intended for emergency use to get you to the nearest tyre repair garage so the overall diameter isn't important.