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tonyevans

az supporter
Joined: Sun Jan 16, 2011 11:18 pm Posts: 1998 Location: Lightning Ridge NSW
Vehicle: SJ40 - LJ50 - LJ50V - Vitara
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 Posted: Sat Apr 16, 2011 6:47 am |
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Silly question I guess but if you want bigger dia tyres why not use 16" rims?

_________________ Old farts sometimes know some stuff you don't.
Last edited by tonyevans on Sat Apr 16, 2011 7:00 am, edited 1 time in total.
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royce

omnipotent being
Joined: Sun Jun 11, 2006 11:30 pm Posts: 17216 Location: Pluto
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 Posted: Sat Apr 16, 2011 6:50 am |
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hard to get and dearer tyres and rims
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vitzookman
Joined: Wed Feb 16, 2011 6:14 am Posts: 347 Location: Bris
Vehicle: 2001 XL7
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 Posted: Sat Apr 16, 2011 7:06 am |
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Depends on the vehicle and if you want some nice rims, no point going bigger if your just using steel rims
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cairns27
Joined: Thu Dec 23, 2010 7:42 pm Posts: 489 Location: Macleay Island
Vehicle: '95 Vitara JXI LWB G16B
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 Posted: Sat Apr 16, 2011 8:37 am |
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yea,
16' tyres are just laying around everywhere,I'm running 235's, and they're rare up here.
Where do I get the 16' rims.
bye
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12997 Location: Melbourne
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 Posted: Sat Apr 16, 2011 8:49 am |
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tonyevans wrote: Silly question I guess but if you want bigger dia tyres why not use 16" rims? 
Because tyre diameter has nothing to do with rim diameter. In fact, there are more tall tyres available for 15 and 17" rims than 16's
Another issue is that tyres for 16" rims often have higher load ratings than 15" rim tyres. That's a bad thing for a suzuki.
There's also a slightly odd selection of tyre sizes and tread patterns for 16"rims.
Also, sidewall height is an issue too. A bigger rim means a shorter sidewall for the same tyre diameter. That reduces compliance and increases the risk of rim damage.
Up to 35", 15" rims are fine. At that diameter, you might as well jump straight to 17". I'll add though that in a light car like a suzuki, the loss of lateral stability from smaller rims and taller sidewalls has less of an effect. In a heavy car, very tall sidewalls lead to yucky performance on side angles.
Steve.
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cairns27
Joined: Thu Dec 23, 2010 7:42 pm Posts: 489 Location: Macleay Island
Vehicle: '95 Vitara JXI LWB G16B
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 Posted: Sat Apr 16, 2011 9:16 am |
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Gwagensteve.....I'm not worried about height or looks, It's just that everywhere ya go there's hundreds of L/C tyre and rims laying around; It'd be nice if I could fit those tyres to my cars.
bye
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SuziBlu
Joined: Mon Sep 14, 2009 11:30 pm Posts: 4268 Location: Eyre Peninsula
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 Posted: Sat Apr 16, 2011 9:20 am |
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When you air down the diff shows, a large dia wheel, like Steve says, has far less side wall to bounce around, than a small dia wheel on the same tyres.
I like the idea of a large side wall, aired down, has great numatic suspension.
_________________ Bad decisions make good stories.
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2stroker
Joined: Sun Sep 07, 2008 11:30 pm Posts: 2689 Location: North Brisbane
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 Posted: Sat Apr 16, 2011 10:08 am |
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Well actually it is only 1/2 of an inch difference in sidewall height between a tyre of same diameter on a 15 or 16 so wall height difference is negligable especially with larger tyres
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SuziBlu
Joined: Mon Sep 14, 2009 11:30 pm Posts: 4268 Location: Eyre Peninsula
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 Posted: Sat Apr 16, 2011 3:31 pm |
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Every little bit helps.
_________________ Bad decisions make good stories.
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cairns27
Joined: Thu Dec 23, 2010 7:42 pm Posts: 489 Location: Macleay Island
Vehicle: '95 Vitara JXI LWB G16B
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 Posted: Sat Apr 16, 2011 7:27 pm |
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I seem to rip the sides of my tyres.There is any amount of 16" tyres laying around.
Is there a rim I can use ?
bye
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matty_wall
Joined: Sun Feb 15, 2009 10:30 pm Posts: 989 Location: Blue Mountains
Vehicle: SJ51T
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 Posted: Sat Apr 16, 2011 9:30 pm |
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Yes you can go GV rims. i'm fairly sure all of them run slightly positive offsets. I have Steel GV rims and i think i worked them out to be +5. not much of a drama for me as i drve a vitara, but most sierra driver usually look for negative offset rims..
Oh yeah you can get 16 sunnies but there super expensive compared to 15s
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3cyl
Joined: Tue Jan 29, 2008 10:30 pm Posts: 2054 Location: Ipswich
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 Posted: Sat Apr 16, 2011 9:49 pm |
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My problem with 15" sizes is over 30" diameter they're all too fat. If I could get 32x9.5/15 I wouldn't have needed to spend up on 16"rims. I have loads of 15" rims but 10.5" is too wide for an LJ50 while 235/85 should be just okay. 750/16 is the ideal but pretty much all 14 ply.
_________________ awesome only comes in 2 colours, camo & bare metal
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2stroker
Joined: Sun Sep 07, 2008 11:30 pm Posts: 2689 Location: North Brisbane
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 Posted: Sat Apr 16, 2011 9:57 pm |
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Just buy some 16 x 7 f100 rims, King wheels have them for around $60 each
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12997 Location: Melbourne
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 Posted: Sat Apr 16, 2011 9:58 pm |
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Using 16" rims to run 7.50 16 tyres (landcruiser) size is a great idea. GV rims are the best way of doing this. They are positive offset so they do actually increase track width slightly over stock. They allow an affordable, narrow and aggressive range of tyres to be run.
However, a 7.50R16 isn't really a "tall" tyre at under 32", and it's at that point using 16" rims stops being an advantage. It's hard to find tyres for 16" rims over 32", and they nearly all require an 8" rim.
There are two exceptions I can think of that can run in under an 8" rim- 255 85 16 (only available in 2 trad patterns) and 9/34 swamper. Neither are easy to come by, or cheap, and you end up building the car around a tyre that can't easily be replaced. That's where I am with my car - I'm running offset, beadlocked 2WD F100 rims to run 9/34 swampers, but to change to a taller or wider tyre I have to change rims as well.
Price a 16X8" rim for a sierra. It starts to make 15's look pretty attractive if you want to go over 32".
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3cyl
Joined: Tue Jan 29, 2008 10:30 pm Posts: 2054 Location: Ipswich
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 Posted: Sun Apr 17, 2011 8:52 am |
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I ended up with 255/85 r 16 Bighorns on the Defender (33.3"), know what you mean on availability and also price when you buy 6 tyres and rims. Lots of 7.50s are 32.2" but none are tubeless.
_________________ awesome only comes in 2 colours, camo & bare metal
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Fatzook

az supporter
Joined: Sat Oct 27, 2007 11:30 pm Posts: 14977 Location: The Hills
Vehicle: Vitara, NGV
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 Posted: Sun Apr 17, 2011 8:54 am |
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I don't mind 16's. Had them on the ute. Still have them on the vit.
_________________ 2013 GV 1998 SV420 ute
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12997 Location: Melbourne
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 Posted: Sun Apr 17, 2011 9:02 am |
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3cyl wrote: I ended up with 255/85 r 16 Bighorns on the Defender (33.3"), know what you mean on availability and also price when you buy 6 tyres and rims. Lots of 7.50s are 32.2" but none are tubeless.
255 85 16's are a great size, but it's KM2's and Bighorns only. If you're committed to a KM2, then a 33 10.5 would be just as good, or better on a suzuki.
I'd disagree that "lots" of 7.50's are 32.2. In my experience it's hard to find them over 32" mounted. I work on 31.75, and many aren't that tall.
Steve.
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Fatzook

az supporter
Joined: Sat Oct 27, 2007 11:30 pm Posts: 14977 Location: The Hills
Vehicle: Vitara, NGV
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 Posted: Sun Apr 17, 2011 9:03 am |
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Yeah the few 750 16's I've measured were about 31.5 new (mounted)
_________________ 2013 GV 1998 SV420 ute
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12997 Location: Melbourne
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 Posted: Sun Apr 17, 2011 9:07 am |
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I had a set of 7.50 16 Firestone SAT's (stunningly good off road tyres) and I don't think they were over 31".
Steve.
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3cyl
Joined: Tue Jan 29, 2008 10:30 pm Posts: 2054 Location: Ipswich
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 Posted: Sun Apr 17, 2011 9:15 am |
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The Dunlop Road Grippers I used on the last desert trip are listed on the spec sheet as 32.2. they were NOT a fantastic tyre though and suffered from continual tube failures when deflated to below 24 psi on a heavily loaded Defender. A mate had 285/75s tubeless at 16psi on a 100 series towing a camper and had no problems (the original reason to buy the 255s).
_________________ awesome only comes in 2 colours, camo & bare metal
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SierraDan

az supporter
Joined: Fri Feb 04, 2011 10:55 pm Posts: 9347 Location: Newcastle
Vehicle: G13BB Jimny
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 Posted: Sun Apr 17, 2011 9:15 am |
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I've seen these single number measurements around.
What unit of measurement is 7.50x16?
_________________ mlm
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Fatzook

az supporter
Joined: Sat Oct 27, 2007 11:30 pm Posts: 14977 Location: The Hills
Vehicle: Vitara, NGV
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 Posted: Sun Apr 17, 2011 9:17 am |
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SierraDan wrote: I've seen these single number measurements around. What unit of measurement is 7.50x16?
7.50 = 7.5" sidewall height
16= 16" rim
_________________ 2013 GV 1998 SV420 ute
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3cyl
Joined: Tue Jan 29, 2008 10:30 pm Posts: 2054 Location: Ipswich
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 Posted: Sun Apr 17, 2011 9:27 am |
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I thought it was section width? I do know that they can vary wildly I once had a old landy with 4 Road Track Majors on it, 3 Dunlop and 1 Olympic (same pattern, different name, same size, 7.50/16) and the Olympic was at least an inch bigger.
_________________ awesome only comes in 2 colours, camo & bare metal
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SierraDan

az supporter
Joined: Fri Feb 04, 2011 10:55 pm Posts: 9347 Location: Newcastle
Vehicle: G13BB Jimny
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 Posted: Sun Apr 17, 2011 9:31 am |
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Fatzook wrote: SierraDan wrote: I've seen these single number measurements around. What unit of measurement is 7.50x16? 7.50 = 7.5" sidewall height 16= 16" rim
Oh that's easy. I thought I was some freaky equation. Cheers 
_________________ mlm
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3cyl
Joined: Tue Jan 29, 2008 10:30 pm Posts: 2054 Location: Ipswich
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 Posted: Sun Apr 17, 2011 9:34 am |
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Actually I think they're supposed to be 100 profile so I guess it's both?
_________________ awesome only comes in 2 colours, camo & bare metal
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12997 Location: Melbourne
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 Posted: Sun Apr 17, 2011 9:45 am |
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You're kinda right. These sizes assume 105% sidewall height, but in reality, it's pretty loose.
The real party starts a 9.00X16 - 9.00 16 Michelins are over 36" tall, even though, on paper, they should be under 35"
I'd love to run 9.00 16's on the F250, but they are pretty hard to find in Australia.
Steve
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