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width of tyre...
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Author:  31zook [ Thu Mar 18, 2010 4:11 pm ]
Post subject:  width of tyre...

hey fellas, i want to know what is the widest tyre you can legally fit to a 5.5inch sierra rim. Will a 29x9.5 work???

Author:  Ben_Sierra [ Thu Mar 18, 2010 4:31 pm ]
Post subject:  Re: width of tyre...

I have a mate with 235/75s on 5.5 inch rims....

No dramas at all, though I don't know about legalities in NSW...

Author:  31zook [ Thu Mar 18, 2010 4:41 pm ]
Post subject:  Re: width of tyre...

so in ol money thats 9.3inch's wide... hmm in the km2 catalogue they think that you need a 10inch rim for a 12.5 and 7.5inch rim for a 9.5 tyre... just don't make sense with me....

Author:  BlueSuzy [ Thu Mar 18, 2010 5:07 pm ]
Post subject:  Re: width of tyre...

12.5 tyres normally want a 8.5" rim. My rims are 8"wide.. = 4.5" of difference to my tyres...

5.5"rims with 9.5" tyres is only 4" of difference.

Author:  Ben_Sierra [ Thu Mar 18, 2010 5:10 pm ]
Post subject:  Re: width of tyre...

Its not reccomended by the tyre companies to put a 235 wide tyre on a 5.5 rim, but it can be done... So I don't see why you couldn't get a 29x9.5 on there, its almost a identical size tyre...

Also, the size lineup for KM2s doesn't list a 29x9.5 tyre on the Australian website.... Only a 235/75/15 which is 28.8x9.3, so its probably the same tyre anyway...

And it also says for the 235: Min Rim: 6.0, Recommended: 6.5, Max: 8.0

So 5.5 is only half an inch outside anyway....

Author:  31zook [ Thu Mar 18, 2010 5:15 pm ]
Post subject:  Re: width of tyre...

cheers tim. But the reason everyone uses 8" rims is because 8 is the biggest legal size you can go.

also on a side note, Vit PS can be passed on my sierra by athol mullen. just some trivia.

Author:  31zook [ Thu Mar 18, 2010 5:23 pm ]
Post subject:  Re: width of tyre...

sorry, should have made this clear that i was keen for a tyre around that height, it was more a question of how wide can i go on zook rims. I want to run my zook as a DD, so narrow rims, and not big ass heavy tyres are what im after.

Im thinking about treps or KM2's in that size...

Author:  Ben_Sierra [ Thu Mar 18, 2010 5:24 pm ]
Post subject:  Re: width of tyre...

Ok well around that height in KM2 is the 235/75... I've never heard of a 29x9.5, though there is a 30x9.5...

5.5's will work, in fact my mate prefers his tyres on the 5.5 to the 7 inch rims he had before...

Author:  31zook [ Thu Mar 18, 2010 5:27 pm ]
Post subject:  Re: width of tyre...

why? was it the handleing?

Author:  BlueSuzy [ Thu Mar 18, 2010 5:28 pm ]
Post subject:  Re: width of tyre...

Cool about the ps!

Might get mine done..ha..

Ive been told 7" rim is legal only for a sierra!.. I think i need to see other engineers..He also wouldnt body swap the jim to sierra lwb without changing..everything....Yet a guys coming down to pickup the jim diffcentre, for his jimny chassis LJ!!Wtf!

Author:  31zook [ Thu Mar 18, 2010 5:37 pm ]
Post subject:  Re: width of tyre...

haha, he prolly won't engineer the LJ...

There is weight restrictions on rim width.

(I was told this by Athol about a year and a half ago, so i could be out with my numbers)
tare weight extra rim width
-900kgs..........+1"
+900kgs.........+1.5"
+1200kgs.......+2"
8" is the biggest rim you can run, and no matter how wide the rim the outer lip must not exceed 25mm wider then stock track.

Author:  Ben_Sierra [ Thu Mar 18, 2010 5:42 pm ]
Post subject:  Re: width of tyre...

He found on the 7 inch tyres his KMs *always* used to get the beads full of mud at low pressures an end up deflating, but it doesn't happen on the 5.5s...

Author:  eldo [ Thu Mar 18, 2010 6:00 pm ]
Post subject:  Re: width of tyre...

on skinny rims you get more balooning of the tyre which is better for us when we let them down

Author:  31zook [ Thu Mar 18, 2010 6:09 pm ]
Post subject:  Re: width of tyre...

hmm, good call luke, thats another plus for not having to buy rims :D im thinking ill go treps as there a stack cheaper :D

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