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Wheel size for a coily
http://auszookers.com/forum/viewtopic.php?f=37&t=45050
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Author:  Jack98 [ Tue Feb 11, 2014 4:47 pm ]
Post subject:  Wheel size for a coily

Hey guys,

Just wondering how big you can go in terms of wheels for a 98 sierra before you would need more power or to muck with the gear box etc.. any help would be good.
cheers

Author:  Reubs [ Tue Feb 11, 2014 5:47 pm ]
Post subject:  Re: Wheel size for a coily

215/75R15...

Author:  1DYX [ Tue Feb 11, 2014 6:25 pm ]
Post subject:  Re: Wheel size for a coily

I'm running 235/75R15's on mine, but I should have put on the 215's as above.
Around town, it not much of an issue, but on a decent country run, the smaller tyre will make the trip more enjoyable...

With the 235's speed drops quite rapidly up hills, and in head winds...

Author:  petes 80 [ Tue Feb 11, 2014 9:05 pm ]
Post subject:  Re: Wheel size for a coily

1DYX wrote:
I'm running 235/75R15's on mine, but I should have put on the 215's as above.
Around town, it not much of an issue, but on a decent country run, the smaller tyre will make the trip more enjoyable...

With the 235's speed drops quite rapidly up hills, and in head winds...


hey mate is that the same as a leafy?

as i was looking at the 235's for a 96 sj70

Author:  1DYX [ Tue Feb 11, 2014 10:16 pm ]
Post subject:  Re: Wheel size for a coily

Same engine. Same massive horsepower.

If you have money to spare, try the 235's. Then try the 215's.

I bought the 235's in a M/T, because they were DIRT cheap. (Brand new from the warehouse, 80 bucks each.) (dirt cheap for WA, that is)
I fitted and balanced them myself.
If the 215's could have been got for the same money, I would had them instead, definately.
My last Sierra, I also ran 235's, so I knew what I was getting in to, but I am not a hard core offroader, and simply play a bit, in the dunes, on the beach, some minor 4wd tracks.
I know if I get off me arse and buy the headers, and maybe a carby, it'll have better performance on the hills, but currently, I am happy enough, not to bother.

Author:  want33s [ Thu Feb 13, 2014 3:37 pm ]
Post subject:  Re: Wheel size for a coily

The OP asked about wheels.
Every reply is about tyres... :?


Jack98, are you asking about larger wheels/rims or tyres???

Stock coily rim is 15x5.5"
Stock coily tyre is 205/70-15.

Author:  1DYX [ Thu Feb 13, 2014 7:11 pm ]
Post subject:  Re: Wheel size for a coily

Yeah, but we knew he meant what size Wheels, as in "tyre and rim assembly". And that always translates to how big a tyre can (we) put on...
And anyways, even a 20" rim wont suck horsepower if you continue to maintain original tyre diameter... (about a 245/30r20.)

HA! :)

But, yeah, possibly you are correct....
BUT... my coily came fitted with 15x7 alloys, dealer installed option.

Author:  Jack98 [ Thu Feb 13, 2014 9:50 pm ]
Post subject:  Re: Wheel size for a coily

Yeah thanks for the help guys, i mean just the overall diameter of the wheel so question answered. If you wanted to go bigger what is the first step in terms of engine/gearbox to deal with a bigger wheel?

Author:  Reubs [ Fri Feb 14, 2014 8:02 am ]
Post subject:  Re: Wheel size for a coily

Jack98 wrote:
If you wanted to go bigger what is the first step in terms of engine/gearbox to deal with a bigger wheel?

Neither. Reduction gears in the transfer case - a 'leafy' transfer case in a 'coily'...

Author:  petes 80 [ Sun Mar 02, 2014 8:07 pm ]
Post subject:  Re: Wheel size for a coily

Reubs wrote:
Jack98 wrote:
If you wanted to go bigger what is the first step in terms of engine/gearbox to deal with a bigger wheel?

Neither. Reduction gears in the transfer case - a 'leafy' transfer case in a 'coily'...


Hey Reubs,

So are you saying just to put a sj70 transfer case in a sj80 this will do the trick if running 235/75/15's????????

Author:  killazook [ Mon Mar 03, 2014 5:51 am ]
Post subject:  Re: Wheel size for a coily

Hey Reubs,

So are you saying just to put a sj70 transfer case in a sj80 this will do the trick if running 235/75/15's????????[/quote]


Not quite you have to put reduction gears in the sj70 transfer case

To get a usable reduction out of it

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