I am looking at the various models that have the compact spare tire.. I know the XJR fits - but does any of the other "X" models fit a '71 XJ as well?


I have XJ40 wheels that are seven inches wide and a spare tire on the same wheel will not fit as it makes the floor wood stick up.


Also, will the jack etc that comes in the foam with those tires fit in the old spare tire wells?

 

Roger, after an exhaustive search for a compact spare, which failed to produce Anything that would fit the hubs (well, except that the wrecking yard use ALL the compact spares they could find for customer hand carts), husband gave up, got a stock rim and had a narrow tire mounted on it. It fits in the spare well, is completely road worthy, but still screams, "GET THAT TIRE FIXED!!"

If I stumble across the "donut" spare that fits, I'll snap it up of course, but I can't devote any more time and energy to such a futile search.
(';')

 

I can use the "tools" that package nicely with the compact spare. Do not
want any of the Jag tools/jack in the trunk area.


It is being upholstered with "grooved" vinyl and I want to make it neater.

 

I nested the jack inside the spare rim.







Of course this only works if you don't use the hold-down bolt, which mine is too short to be of any use and is only there for show.

There's quite a lot of space in my tire well, with the 205/65/15 spare.
(';')

 

Well, the lattice XJS 7'ers are way too fat for my spare well.


Mine came with a really old 215 x 70 x 1t on a Kent wheel.
Still too fat, but not as much.


The board rides high.


When it got new tires on the 7" lattice XJS wheels, I tried
a "younger" tire on one of the displaced Kents. Too tall.


Back to the original old "hockey puck hard tire on the Kent.


The black plastic Dzus like fastener was to short to do anything.
I made a longer facsimilie. Works. But, the cover still rides high.


My durn near pristine original "scissor" jack is in it's
original tool roll strapped to the left boot wall.


I've a lot of gear in the boot. Reasonably neatly stored.
A lady complimented me at the market a while back.


Room for four or five grocery bags is there and all I need.


Emergency gear, yeah, why????


Carl

 

I just cannot believe that I am the only one who has a donut spare that fits a Series 3 ?

 

It's just that you happened to be in the right place at the right time, Jose.

From the time you first posted that tire, we have looked everywhere, even exhausted our online resources and have found *Nothing* that will fit any Series Jaguar! Not even the right bolt pattern!

There are plenty of X-type and S-type donuts out there, cheap. Husband even asked around at the wrecking yards in the region, they "say" they leave them in the cars. HA! Maybe the management does, but then the yard crew ****** them weld another rim to them and make stands for holding up cars, or they make 2-wheeled courtesy carts with them.

Husband even made up a list of possible candidates that he could possibly modify to make work. Nada. So after 6 months we gave up and went the direction you see above.
(';')

 

LnrB, yes I can see how one can get discouraged when exploring for parts, but never give up, those donut spares are out there in Craigslist. If your Series 2 spare tire holdown is too short for the Kent wheel, the Series 3 holdown will work.

 

There are lots of compact spares for Jaguars out there.. but shipping is problem... if I knew which ones would actually fit our older model(s) I could
choose one. XJR, XJ8 or as they say "X" models...

 

the donuts are light in weight when inflated to their 60 psi spec, so if shipped uninflated, they weigh less, and they can be shipped wrapped in Saran wrap like tires are shipped. Any donut that fits a Series 3 will fit a Series 2.

 

Jose:


Is it you or is it me ? A deflated donut weighs less than
an inflated one?


And, shipping may not be all bad... UPS delivered a trailer hitch
for my Jeep from CA's central valley. Heavy critter. I forgot how much. Twas reasonable, though.


It is surplus now, anyone need a hitch for a mid 90's Grand
Cherokee???


Carl

 

PS,


I think Jaguar lug pattern is compatible with a lot of Chevrolets and probably other GM cars....


Carl

 

Carl, its you.

 

Jose:


Mebbe not ??? An interesting problem in basic
theory???


Discuss here, mebbe. After the holidays.


Enjoy them!


Xmas shopping done, I think??? Done a bit ad hoc. Two gals and a guy to shop for. Each vastly different??? Not only in gender, but, in interests.


I think my son is a genius or close to it??? Extreme modifications of an ancient CNC mill. Modern electronics to manage the old iron.
Programs X, Z and Z movements of the bit. Results in alloy and plastic manifold spacers. For sale in his on line store. His machines are huge... Exceed the capacity 5.000 # of his ancient fork lift. Not in lift, but, counter balance!!!


Carl

 

Carl,. so air has no mass, therefore no weight?. What if air is combined with mass? Does it affect the weight of the mass? I confess that I don't have a scale to test an inflated vs a deflated tire, but a deflated tire FEELS lighter.

 

Jose:


The air isn't combined with the mass of the tire and wheel !
It is merely confined in a chamber.


Is it air density? More dense at 30 PSI than at atmospheric?


Or is an inflated tire actually "lighter" than a flat one?


Think of an inflated balloon vs one sans any air?


Or, lighter than air craft, ie blimps and dirigibles !


I've not reached a conclusion, one way or another.


No flat tires around here to experiment with using my bath scale.


Mebbe next week or next year year????


Carl..

 

When I was in about the second grade this question came up, Does air have weight, so the teacher set up an experiment.

First a balanced rod, then an empty party balloon straight out of the box was hung off one end. Another similar balloon filled with air from the shop compressor (country schools have some advantages) was hung off the other end. The inflated balloon was heavier.

I found a bicyclist site dealing with this question and the math to prove it if anyone is interested. It deals with pressures, temperatures and various dimensions and volumes of torsuses (should be tori) but I don't speak math very well.
How much does tire pressure affect the weight of the wheels - Bicycles Stack Exchange

Blimps and such do float because they're filled with helium, which is a Lot lighter than air, an oxygen/nitrogen mix.


Sorry, Roger.
(';')

 

Ok so filling a tire with helium would make it cheaper to ship??? I like this idea, gonna invent a helium filled shipping bladder to beat the system!!!

 

Ugh, what did I and Joe start ?


1. The second grade balancing experiment is convincing.


2. Concede blimps and dirigibles rely on lighter gases. Helium or in a disaterous past, Hydrogen.


3. Air as we know it in the atmosphere is mostly nitrogen. But, Oxygen is only one of the many other gases.


So, extraction and sales of each is such a great business. The raw material is free!!!


So, when tire stores offer nitrogen inflation, it isn't much different than just "plain" air. Air that isn't so "plain".


A further "conclusion". The difference in weight of an inflated donut vs a flat one is so insignificant so as to not matter.


Further, I would prefer a spare of any type that was inflated, o'wise why have it????


HAPPY HOLIDAYS TO ALL.


Carl

 

I think LnrB just proved the theory, the darned tire is heavier when inflated to recommended psi. Whether Darren gets arrested for trying to ship tires filled with Helium, that will surface in another thread !