Author Topic: Changing from Inflation Kit to space saver tyre  (Read 1326 times)

Maraz

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Changing from Inflation Kit to space saver tyre
« on: February 16, 2020, 07:18:31 PM »
Hi, I'm new here (and also new to the Jazz brand - but I love IT!).
The biggest issue I got with my new car is the absence of a spare tyre.
I know this issue was already been contentious in this forum, and I've read some very good posts. However, after looking under the trunk's board and removing the plastic structure - I was surprised to see no bolt or hole for a bolt. It seems impossible to convert to space saver without damaging the car, isn't it? Any suggestion how to safely secure the tyre?

Kenneve

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Re: Changing from Inflation Kit to space saver tyre
« Reply #1 on: February 16, 2020, 08:02:01 PM »
Assuming you have brought a brand new car, the under board volume has been reduced, such that it will not accommodate a normal spare wheel. Iím not familiar with the space saver wheel dimensions, but I doubt it will accept that either, hence the supply of tyre repair gunge!

I was initially concerned myself when I brought my Mk3 Ex, but simmered down, when I realised how old I was (80+) and would probably be incapable of changed a wheel, by the roadside myself, not to mention the safety issues involved with the general standard of driving  nowadays 🤠

peteo48

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Re: Changing from Inflation Kit to space saver tyre
« Reply #2 on: February 16, 2020, 08:21:02 PM »
Yes - I'm 71 with a bad back amongst other things and wouldn't change a wheel myself these days. I'd call out the rescue service if the gunk couldn't get me home or to the nearest garage.

Maraz

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Re: Changing from Inflation Kit to space saver tyre
« Reply #3 on: February 17, 2020, 07:03:43 PM »
Thanks. Am I the only one feeling irritated by having no backup in the trunk?

John Ratsey

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Re: Changing from Inflation Kit to space saver tyre
« Reply #4 on: February 17, 2020, 10:09:24 PM »
If the space is big enough then put a spare wheel in there (current production of European Jazzes don't have a big enough space). There should be a hole for a fixing bolt under the carpet (if there is one) but if there isn't then don't lose any sleep. Pack some old clothes and tools around the wheel to stop it moving around when you are driving. OK. It's not secured in event of a crash but is still restrained by the boot floor and if you turn the vehicle upside down then a moving spare wheel is well down the list of worries.

peteo48

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Re: Changing from Inflation Kit to space saver tyre
« Reply #5 on: February 17, 2020, 10:11:01 PM »
No, to be fair Maraz, I think you make a good point. It's just that as an old geezer I wouldn't be changing a wheel myself these days. I have done so, several times, in the past.

John A

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Re: Changing from Inflation Kit to space saver tyre
« Reply #6 on: February 18, 2020, 06:28:53 AM »
Yes - I'm 71 with a bad back amongst other things and wouldn't change a wheel myself these days. I'd call out the rescue service if the gunk couldn't get me home or to the nearest garage.

If you have a spare wheel, then if the gunk doesn't work, a rescue service could fit your space saver wheel and get you on your way a lot quicker than if they have to get a recovery truck out to you.

I bought a space saver wheel, though the last puncture was many years ago, but a couple of years ago I hit a pothole that not only flattend the tyre, but damaged the wheel, and having a space saver meant I was mobile very quickly

ColinS

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Re: Changing from Inflation Kit to space saver tyre
« Reply #7 on: February 18, 2020, 08:50:40 AM »
I went for 3 years in my Jazz without getting a puncture and without a spare wheel but I was anxious about not having one.

So when I bought my HR-V, I ordered one with the car.  After a few weeks I got a puncture and used the space saver to get me to the garage.  They fixed the puncture and sent me on my way.  The repairer commented that if I had used the 'gunk' then he would not have been able to repair it and I would have been faced with the cost of a new tyre to replace one that had done less that 1,000 miles.  What a good decision that turned out to be.

culzean

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Re: Changing from Inflation Kit to space saver tyre
« Reply #8 on: February 18, 2020, 09:09:39 AM »
I went for 3 years in my Jazz without getting a puncture and without a spare wheel but I was anxious about not having one.

So when I bought my HR-V, I ordered one with the car.  After a few weeks I got a puncture and used the space saver to get me to the garage.  They fixed the puncture and sent me on my way.  The repairer commented that if I had used the 'gunk' then he would not have been able to repair it and I would have been faced with the cost of a new tyre to replace one that had done less that 1,000 miles.  What a good decision that turned out to be.

Gunk is deadly to those integral ( direct ) TPMS sensors as well...... but not the ABS version  :)
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

Roddy0000

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Re: Changing from Inflation Kit to space saver tyre
« Reply #9 on: February 18, 2020, 12:39:01 PM »
I went for 3 years in my Jazz without getting a puncture and without a spare wheel but I was anxious about not having one.

So when I bought my HR-V, I ordered one with the car.  After a few weeks I got a puncture and used the space saver to get me to the garage.  They fixed the puncture and sent me on my way.  The repairer commented that if I had used the 'gunk' then he would not have been able to repair it and I would have been faced with the cost of a new tyre to replace one that had done less that 1,000 miles.  What a good decision that turned out to be.

Gunk is deadly to those integral ( direct ) TPMS sensors as well...... but not the ABS version  :)

Can u please explain further. Ty

John A

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Re: Changing from Inflation Kit to space saver tyre
« Reply #10 on: February 18, 2020, 02:04:44 PM »
I went for 3 years in my Jazz without getting a puncture and without a spare wheel but I was anxious about not having one.

So when I bought my HR-V, I ordered one with the car.  After a few weeks I got a puncture and used the space saver to get me to the garage.  They fixed the puncture and sent me on my way.  The repairer commented that if I had used the 'gunk' then he would not have been able to repair it and I would have been faced with the cost of a new tyre to replace one that had done less that 1,000 miles.  What a good decision that turned out to be.

Gunk is deadly to those integral ( direct ) TPMS sensors as well...... but not the ABS version  :)

Can u please explain further. Ty

One system measures the actual tyre pressure - direct, the other detects changes in wheel speed relative to its opposite one that might be due to a tyre deflation.

culzean

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Re: Changing from Inflation Kit to space saver tyre
« Reply #11 on: February 18, 2020, 03:40:47 PM »
There are 2 main kinds of TPMS (tyre pressure monitoring system )

1.  Direct - this has a battery powered pressure sensor inside the rim that transmits pressure information to a receiver in the car. The direct measurement of pressure means this can display actual tyre pressure when car is stationary.

2. Indirect - this relies on the pulses from the ABS sensors on each wheel hub,  when a tyre starts to lose pressure ( goes flat at the bottom ) the 'rolling radius  ( distance from centre or hub to the road surface ) reduces,  this means for any given speed the wheel has to rotate faster ( it is in effect a smaller diameter wheel ) - this means that the rate at which the pulses arrive at the ECU from that wheel increases,  when the ECU compares the frequency of the pulses it will see a mis-match from the punctured wheel and flash up an icon of a flat tyre on the display. 
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

Roddy0000

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Re: Changing from Inflation Kit to space saver tyre
« Reply #12 on: February 18, 2020, 08:18:48 PM »
There are 2 main kinds of TPMS (tyre pressure monitoring system )

1.  Direct - this has a battery powered pressure sensor inside the rim that transmits pressure information to a receiver in the car. The direct measurement of pressure means this can display actual tyre pressure when car is stationary.

2. Indirect - this relies on the pulses from the ABS sensors on each wheel hub,  when a tyre starts to lose pressure ( goes flat at the bottom ) the 'rolling radius  ( distance from centre or hub to the road surface ) reduces,  this means for any given speed the wheel has to rotate faster ( it is in effect a smaller diameter wheel ) - this means that the rate at which the pulses arrive at the ECU from that wheel increases,  when the ECU compares the frequency of the pulses it will see a mis-match from the punctured wheel and flash up an icon of a flat tyre on the display.
Does that mean at some point the battery will run out? Ty

culzean

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Re: Changing from Inflation Kit to space saver tyre
« Reply #13 on: February 18, 2020, 09:22:20 PM »
There are 2 main kinds of TPMS (tyre pressure monitoring system )

1.  Direct - this has a battery powered pressure sensor inside the rim that transmits pressure information to a receiver in the car. The direct measurement of pressure means this can display actual tyre pressure when car is stationary.

2. Indirect - this relies on the pulses from the ABS sensors on each wheel hub,  when a tyre starts to lose pressure ( goes flat at the bottom ) the 'rolling radius  ( distance from centre or hub to the road surface ) reduces,  this means for any given speed the wheel has to rotate faster ( it is in effect a smaller diameter wheel ) - this means that the rate at which the pulses arrive at the ECU from that wheel increases,  when the ECU compares the frequency of the pulses it will see a mis-match from the punctured wheel and flash up an icon of a flat tyre on the display.
Does that mean at some point the battery will run out? Ty

The Jazz has the indirect ABS system ( except for model year 2015, when they tried direct TPMS but then went back to ABS system ),  so no battery to worry about - you can change from winter to summer wheels and re-calibrate the TPMS from the car display.  Problem with the direct method is that the battery will run out ( they say they last 5+ years ) but other than that if you want to fit summer and winter wheels you need to buy another compatible set of sensors for new wheels and the ECU can only remember 4 sensors at a time,  so when wheels get changed in spring and autumn you have to take car to a specialist to get the different sensors programmed into system,  which is normally about £50 twice a year.  Many people with direct TPMS opt for 'all season' tyres and keep same wheels all year round,  it is a lot cheaper.
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

pidj

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Re: Changing from Inflation Kit to space saver tyre
« Reply #14 on: February 20, 2020, 10:14:52 AM »
I've just bought a 2016 Jazz EX (66 reg), without a spare wheel, and have the same concern about tyre repair kit vs spare tyre. I've always carried a spare, even though I've rarely needed one, but just feel happier with the reassurance it gives when driving further afield.

Now I can't decide between the space saver kit or a full size spare. I'm sure the well is deep enough in my car for a full size one, but when I phoned a Honda dealer to check, he said it wouldn't be and the boot floor would have a bump in it. He recommended the space saver kit instead at a cost of £334 incl tools & fitting, which I though a bit high!!

I looked at the Cox Motor Parts site (as recommended by a few people on this forum) and it suggests that a full size one will fit, but I don't want the hassle of getting one that doesn't and then having to return it.

Anyone got the same model as me and carry a full size spare? Or would the space saver be a better option?

« Last Edit: February 20, 2020, 10:16:32 AM by pidj »

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