JB's MT's

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JB, good advice there from Clive. So even if you have the rims doing
nothing and put a set of MT's on, you still have the risk of them
deteriorating prematurely whilst they sit in the shed between each
outing to the local bog. But there again, that is a cost you will
have to put on your hobby of playdays with your mates. Deterioration
of tyres is something we have to acknowledge, and don't look now, but
the EU are intending to bring in laws that force us to renew them by
a new 'use by' date that will appear on the sidewall moulding. (I
think it may already be there for some EU markets).
You are lucky in having a spare set of rims as they are expensive to
buy for the 80. So why not buy a set of cheap knobbly MT remoulds
from Colway;and as Julian suggests, just bolt them on for the
off-road events only. But I still seem to get everywhere on my Dunlop
AT's. Though last week I had to fit a Turkish Lassa 'Competus' AT in
a hurry when a machine screw found its way into a rear tyre and
parted the steel cords. But there again, judging by the cracks on the
edge of the tread I think my Dunlops are near their demise. It gave
me a chance to rotate them around the axles whilst I was at it.
Cheers
Jon
'92 HZJ80 ex UN Bosnia surplus
 
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John et al,
Rubber compounds are attacked by Ultra Violet light. If you have a spare set of wheels / tyres I would reccomend partial deflation to literally - take the pressure of the side walls, then store them with a light proof cover over them.
Gareth Jones.
 
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Hi Gareth and Jon-C-W
So Gareth you reakon it will be fine to store them in the shed covered in
the dark, much like my wine really.
As long as I dont have to sing to them I dont mind at all. But now Jon -C-W
has thrown in some more info that I will ahve to think about.
Jon I have seen a few sets of the cruiser wheels on ebay of late and they
are going quite reasonable at time, they come of other vehicles as well such
as surfs and prados, some even come with tyres.
I reakon I have about another two or so years left in the tyres I have on so
maybe buying now may not be the best idea after all unles Gareth your idea
works then my idea is great.
Gareth are there tyres places open on the Bank Holiday weekend if I was to
bring my rims and then get the tyres put on .
cheers
John
92HDJ 80 1HDT Rep of Ireland
 
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John, regarding getting the tyres fitted. Some places will be open on the Saturday. We will do some telephoning to double check. Remember that 5 tyres on their rims are going to weigh a lot and take up a considerable amount of room.
Gareth.
 
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Hi Guys
Are the center holes in the cruiser wheels where the hubs are, the same size
in all jap 4x4s. Are all six stud wheels the same.
The reason im asking is there are a number of wheel /tyre combinations for
sale on ebay which are off or suitable for jap 4x4s.
So I just wondered if there is any difference .
cheers
john
92HDJ 80 1HDT
 
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John , I can't comment about the holes centres, but one thing to remember about 80's is that if you want to run 285 wide tyres you need 8 inch wide rims - marked I beleive as 8JJ. Lots of rims on EBAY are 7 inch wide. Fitment of a 285 wide tyre on these will result in a bulging sidewall that is easily damaged.
Check the Birfield archives for compatability issues with other makes.
Gareth.
 
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Thanks Gareth
I did think that some were too wide for the old 7 inch rims but am unsure
even if I get a cheap set of 16s that all the center holes are the same. Now
to me anyway I would think they are but then me being me there is a good
chance im totally wrong as I usually am.
cheers
john
 
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Gareth,
Mine are 285's on standard rims. When I sought advice about this
I was told that a tyre that big is almost a truck tyre and to run them
at 38/40 PSI. I do this and there is no noticeable side wall bulge.
285 is only one size up from standard.
Regards, Clive.
On 3/13/06, John Byrne <[Email address removed]> wrote:
Now
 
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Clive, my standard 16 alloy wheels are 8JJ which is spot on from the BF Goodrich chart for 285 / 85 tyres. I run mine at 40 psi.
Regards Gareth.
 
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JB you will see a lot of rims advertised "suitable for Jap 4X4's". I
can't talk about alloys as I have never had them on my 80 or Pajero.
But remember that if you are looking at steel rims - which you most
probably are - apart from the hole dimensions, the critical
measurements are first the offset of the centre and second, that of
the thickness of the steel itself as used by Toy is 8mm. I would
suggest very few of the cheapos that you see advertised are that thick.
Cheers
Jon
'92 HZJ80 ex UN Bosnia surplus
 
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Hey Jon-c-w
What is an off set for a wheel.
john 92HDJ 80 1HDT
SNIP
But remember that if you are looking at steel rims - which you most
probably are - apart from the hole dimensions, the critical
measurements are first the offset of the centre and second, that of
the thickness of the steel itself as used by Toy is 8mm. I would
suggest very few of the cheapos that you see advertised are that thick.
 
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John,
See http://www.tirerack.com/wheels/tech/techpage.jsp?techid=3D101
Offset is not a critical parameter - I've run on hilux wheels for
some time and didn't notice any particular symptoms, but at at least
it makes the LC look better if the proper rims arre fitted. The
cheapest aftermarket rims are the eight white spoke. Not very strong
but in France can be bought for EUR65 each for the 7x16
--
Rgds,
Roman (London, UK)
'92 HDJ80
On 3/13/06, John Byrne <[Email address removed]> wrote:
 
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JB,
Thanks to me having the digest your question to me has been
admirably answered in my absence.
I would only add that I have seen what grief an apparently 'right'
accessory wheel has come to on an 80. Its easy to measure, don't cut corners.
Cheers
Jon
'92 HZJ80 ex UN Bosnia surplus
 
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Hey Jon-c-w
Are you saying stay away from the 8 spoke wheels.
What do you think or any one else for that matter about the ability of the
modular steel wheel to keep going without getting all bent out of shape.
Its amazing the info you can get by asking all the silly questions.
It would seem that to keep the below axle height of my cruiser I cant use
the spare rims that are only 7 inch wide.
Nobody that I have been in toutch with recommends going over the size of
31/10.5/15.
That would mean a drop of 1 inch under the axle and although it seems its
only one inch what the hell is he on about, it would mean 1 inch less
ground clearance for the axles etc, which could mean passing over an object
or hitting it.
So all I have to do is find the right cheap wheels with the right cheap
tyres with the right off set and hey im happy again.
cheers
john
92HDJ 80 1HDT
 
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Hi Guys
Is anyone running tyres in the size 33/12.5/16 with a 2 inch body lift. Just
wonering if the 12.5 will have enough room to fully turn as these seem to be
the only width I can get in the MTs if I go for the 33 inch.
cheers
john 92HDJ 80 1HDt rep of Ireland
 
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JB wrote...
Most of the MTs are made that way with the rims of
tread onthe inside and the lugs on the outside. I was looking at the General
MTs which are a good price and seem fairly chunky but not sure now if the
tread pattern is correct to prevent side ways slipping. I have thought about
the retreads for the off roading but have read they are very hard to
balance.
SNIP
JB don't get me wrong now. Most of the MT's have this type of tread
but they also have a blocky pattern in a wide band or two in the
centre and they are just right for the mud. The sort I mean are sold
as an alternative or mid-way tyre for mud and road use, so they have
a skinny type of continuous rib or ribs in the centre to give better
- quieter - road performance and lower wear. But like all compromises
they are very limited in options.
Don't worry too much about the deterioration of remoulds, for the
limited use you give them it will be a small cost. New ones also
deteriorate too. You will come to the point where you have to accept
some cost for your enjoyment. You are right that they are not the
best to balance, but they can be balanced; though if you only put
them on for playing then it will not be so much of a problem when you
are steaming round the bog at 5mph will it? I think its a minor
issue. Also remember that you might not like spending your spare time
playing in the mud - maybe your wife won't like you doing it either.
So be cautious on how much you spend at first. Overhauling your
brakes and more rigorous maintenance sounds like a higher priority
just at present !
By the way, thanks for your tip about wheel cleaning. I was just
trying to perpetuate my Scots proclivity to avoid spending anything ;-)
And Julian wrote...
Yes I have Goodyear Wrangler MTs and personally wouldn't have them
again as a day to day tyre. I find them too slippery in the wet on
tarmac, very noisey and not much use on slippery mud and grass.
One of the key things with the BFG ATs is the tyre pressures. Many
people seem to run them at very high pressures around the 40-45psi
mark, I think for economy or something (not really looked that deeply
at is but a quick search of the 80 list archives on Birfield.com will
bring up some reasoning), but at that pressure I found they preformance
on slippy mud, slippery roads was diminished.
If, however you run them at the recommended pressures for the car (off
the top of my head around 30-32psi) they perform a lot better.
SNIP
Thanks Julian, I was just referring to mud performance as it was JB's
topic. I agree about their performance outside the conditions for
which they were designed. That's why I still prefer AT's with the
addition of snow chains in mud if I really have to. Pressures too, 32
is what I stick too unless heavily laden, especially with the trailer.
Cheers
Jon
'92 HZJ80 ex UN Bosnia surplus
 
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John,
I run Simex Jungle Trackker IIs on 16" rim. 34x10.5 - I believe they work
out to be a 33.5 and not a true 34".
They are very good in mud (not that I c much over here these days - just
bleeding snow!) but not that great on side slopes (maybe John W can chime in
here with his Centipede version - not sure if they are better on a side
slope).
They are 'narrow' (compared to other mud tires for an 80 e.g. MTRs or BFGs)
and bite down - hence part of the reason they are good. However over here
when on snow they get 'down' and often get stuck whereas the other 80s are
running on 25psi BFGs/MTs and they spread quite a bit and allow a better
float. The Simex are very stiff walled and only when I drop below 15psi can
u see a visible difference. It doesn't make any difference on the width (if
u c a picture of one u're see why as with the blocky lugs it ain't gonna get
wider) but makes a difference on the length and that seems to help.
Hoping with all the snow (best in 20 yrs - good if u're a skier!) we've got
over here that I can find some trails over the next few months that I can go
play in (as in snow melt = lotsa water = lotas mud). However although 50% of
the state is public land (forestry and BLM) most of the known trails get
closed down so as not to 'impact' the runoff (with 4x4's chewing it up :)
My body lift is roughly 2-4" (depends on if camping and laden down) but even
when running at 1.5-2" the Simex only ever rubbed in the rear on very odd
(really stuffing it up) occasions. And then it was only very temporarily so
was never bothered. As long as it 'fits' in the well (and not outside a bit
where its gonna pop off the fender covers) its fine.
At the others have indicated, if u can afford it, get another set of wheels
(get cheap ones if u can or 2ndhand but unlikely as 16" rims for an 80
pattern are hard 2 find - unless u can find a crashed one at a junkyard) and
put on some MT remolds - and go have some fun. I've my Simex on a 2nd set.
I'm running road-tires on my normal (OEM) wheels and will go back to AT's
(was running 265 AT's b4) when these wear out.
The other option is run chains on your road/AT tires and c how that works
out. Likely better than MT's but only 4 going slow. Will give u/others
something 2 talk about!
Most of the 80 guys over here (except those pushing the extreme) run
285x12.5 MTs/BFGs and no issues on a (true) 2" lift.
Lal in Colorado
-----Original Message-----
From: [Email address removed]
[mailto:[Email address removed]]On Behalf Of John Byrne
Sent: Sunday, March 26, 2006 3:57 PM
To: [Email address removed]
Subject: Re: [ELCO] JB's MT's
Hi Guys
Is anyone running tyres in the size 33/12.5/16 with a 2 inch body lift. Just
wonering if the 12.5 will have enough room to fully turn as these seem to be
the only width I can get in the MTs if I go for the 33 inch.
cheers
john 92HDJ 80 1HDt rep of Ireland

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