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ZookiBoi
Joined: Fri Dec 09, 2011 10:10 am Posts: 79 Location: Bundaberg Queensland
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 Posted: Wed Mar 07, 2012 12:52 pm |
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Hi people,
What is the biggest size all terrain tyre i can put on my sierra 1.3ltr without having to change gearing or having it affect my top end speed?
Thanks.
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mnemonix

az supporter
Joined: Sun Aug 16, 2009 11:30 pm Posts: 1409 Location: Newcastle NSW
Vehicle: '96 LWB trayback
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 Posted: Wed Mar 07, 2012 12:54 pm |
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If you specifically want AT's, without gearing or changes to your onroad characteristics, you'd be best advised to stick to the factory size.
_________________ Twin charged twin cam twin locked webwheeler
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ZookiBoi
Joined: Fri Dec 09, 2011 10:10 am Posts: 79 Location: Bundaberg Queensland
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 Posted: Wed Mar 07, 2012 1:00 pm |
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So I can't go ANY bigger without changing anything?
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mnemonix

az supporter
Joined: Sun Aug 16, 2009 11:30 pm Posts: 1409 Location: Newcastle NSW
Vehicle: '96 LWB trayback
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 Posted: Wed Mar 07, 2012 1:05 pm |
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You can, but why do you want to? You could go from 205/70 to 215/70, but with AT's the offroad experience will barely improve if at all, and you'll have a smaller selection of tyres to choose from.
_________________ Twin charged twin cam twin locked webwheeler
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abclarke
Joined: Mon Feb 14, 2011 8:19 am Posts: 1966 Location: Couridjah
Vehicle: 1985 Holden Drover
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 Posted: Wed Mar 07, 2012 1:08 pm |
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Someone can correct me if im wrong, but if he HAS to stay to that size, wouldnt it be better going for a mud terrain? Dunno what hes after though, better off road or just something bigger?
_________________ 1989 WT Sierra.
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Rossco
Joined: Fri May 28, 2010 10:28 am Posts: 529 Location: Townsville, QLD
Vehicle: 91 WT 1.6EFI
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 Posted: Wed Mar 07, 2012 1:13 pm |
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Do they even make a mud terrain in 205/70? But what's the point? I would save my money for when I destroyed something for lack of ground clearance.
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ZookiBoi
Joined: Fri Dec 09, 2011 10:10 am Posts: 79 Location: Bundaberg Queensland
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 Posted: Wed Mar 07, 2012 1:57 pm |
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I mainly want just bigger tyres bit more clearance and stuff I hardly ever drive in really muddy stuff
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royce

omnipotent being
Joined: Sun Jun 11, 2006 11:30 pm Posts: 17216 Location: Pluto
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 Posted: Wed Mar 07, 2012 2:01 pm |
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Sierras have no power and barely good enough gearing standard, if I ever owned one again I would change the gearing even if I planned to keep standard tyres on it
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ZookiBoi
Joined: Fri Dec 09, 2011 10:10 am Posts: 79 Location: Bundaberg Queensland
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 Posted: Wed Mar 07, 2012 2:23 pm |
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Well I would change gearing I guess If I had any clue how to do it. But I dont
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abclarke
Joined: Mon Feb 14, 2011 8:19 am Posts: 1966 Location: Couridjah
Vehicle: 1985 Holden Drover
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 Posted: Wed Mar 07, 2012 3:02 pm |
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Thered be plenty of guys on here who wouldnt mind helping out for a beer... or a case 
_________________ 1989 WT Sierra.
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Reubs
Joined: Wed Sep 09, 2009 11:30 pm Posts: 1522 Location: Brisbane
Vehicle: SJ80, SE416
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 Posted: Wed Mar 07, 2012 3:19 pm |
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ZookiBoi wrote: What is the biggest size all terrain tyre i can put on my sierra 1.3ltr without having to change gearing or having it affect my top end speed?
IMO 215/75R15. I run M/Ts in this size with standard gearing and a 1.3 and have no trouble cruising on the highway at the speed limit - even up Brisbane's Gateway Bridge.
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whincup

az supporter
Joined: Sat Apr 17, 2010 11:30 pm Posts: 1588 Location: Gracemere, QLD
Vehicle: '94 suzuki maruti
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 Posted: Wed Mar 07, 2012 7:37 pm |
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x2 on the 215/75... no bigger if you plan on doing rockcrawling. having said that, i ran 31's on stock WT gearing for a while, and its fine on sand and in mud, just be warned, low range gets a lot of use, and 5th gear wont get touched even on highways  BFG does AT and MT tyres in the 215/75 size, dont know what other companies do
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ZookiBoi
Joined: Fri Dec 09, 2011 10:10 am Posts: 79 Location: Bundaberg Queensland
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 Posted: Thu Mar 08, 2012 10:51 am |
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Ok thanks very much guys I really appreciate it 
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fully sick coily
Joined: Tue Feb 14, 2012 7:47 pm Posts: 474 Location: brisbane
Vehicle: chick magnet coily
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 Posted: Thu Mar 08, 2012 4:12 pm |
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mate, i gotta stock as a rock coily with 30" maxxis buckshots no lift or any thing and its fine
_________________ when in doubt... HOLD IT PINNED!!! :)
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