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Location:
Rockhampton QLD
Registered:
July 2004
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[AE86] Wheel size and handling
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Thu, 02 December 2004 08:33
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Hi all,
how would throwing 15 by 7inch wheels on my stock sprinter affect its handling? Im thinking more grip, but what else is there to consider? Oh yeah and its geting potenza G3's.
Thanks
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Location:
Melbourne
Registered:
March 2003
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 08:37
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lower profile means it will be more resistant to the sidewall flexing and there will be a larger contact patch on the ground increasing grip. But it will make the car aquaplane a lot more easily so be carefull in the wet
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Location:
Rockhampton QLD
Registered:
July 2004
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 09:00
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cheers 
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Location:
Adelaide
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 09:17
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A much trickier question than it first seems.
Differentiate between handling and grip.
Grip is physically how much friction the tyres can develop.
Handling on the other hand is a much vaguer area. It includes grip but also encompases the feeling, feedback, behavior, efficeiency and transient response of a vehicle.
They ideally work together...
Wider tyres will have more grip but the real art is to modify the suspension so it makes the absolute best use of the cars tyres in terms of contact patch. Then add some wide soft, sticky tyres and you'll be in AE86 heaven.
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Location:
Rockhampton QLD
Registered:
July 2004
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 09:40
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thanks rex, suspension is next on my list. im looking at the whiteline kit, it seems to cover everything.
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 09:57
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15's and 195/50's or 14's and 185/60's are the go
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Location:
Adelaide
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 13:05
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In terms of tyres only, Rex uses Yokie ES100's in 205/50-15.
Generally the widest softest performance based rubber you can fit on a rim is the way to go.
Rex is contemplating on trying something like Advan 032R or A048's in a 205/50-15 as a part time set. Part time because they wont last too long .
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Location:
Perth, WA
Registered:
February 2003
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Re: [AE86] Wheel size and handling
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Thu, 02 December 2004 13:05
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15's and 195/50's or 14's and 185/60's are the go
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I'd second that.
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Location:
Melb
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 03:34
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I thought larger tyres do not actually make a larger contact path but just change the shape of the tyre and contact path
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Location:
Melbourne
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 04:21
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Going to 15's will make your car feel less squirmy, my pro definition. You are chopping out 25mm of sidewall in each tyre, so expect your car to be transformed, unless of course you choose some cheap shit tyres. Don't get SIME austar primas, unless you have a 4AC
dodgydan
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Location:
Darwin
Registered:
April 2003
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 04:28
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| LiL_MiC wrote on Fri, 03 December 2004 13:04 |
I thought larger tyres do not actually make a larger contact path but just change the shape of the tyre and contact path
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I think I see what you're saying here.
Assuming equal tyre pressures and compounds; wider tyres does not mean more grip.
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Location:
Dandenong Ranges, VIC
Registered:
July 2004
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 05:01
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I thought larger tyres do not actually make a larger contact path but just change the shape of the tyre and contact path
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are you sure? if each square cm of rubber in contact with the road generates X amount of friction, surely more square cm of rubber on the road = more friction/grip with the same tyre pressures/compound/tread pattern etc. or am i missing something here?
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Location:
Darwin
Registered:
April 2003
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Location:
Melb
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 06:06
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yeh i was told by c2888 here a while back something like that. And I think I read the same thing in '21st century performance'. Pretty fat book, but very cool read. They have pics to demonstrate it too.
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Location:
Dandenong Ranges, VIC
Registered:
July 2004
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 06:17
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well, if you take this to the extreme, and have a contact that is 100cm wide, according to your philosophy that tyre will not generate any more grip than a contact patch that is say 10cm wide. correct? surely this cant be the case. why would a top fuel dragster use huge wide tyres if it didnt produce any more traction than your normal 10" slick?
i understand that the law of diminishing returns applies, and that we are talking more about lateral cornering grip than straight line traction here, but some of these principals must be common between the two, no? even when you consider the effect of a ladder bar/four link rear end (which just simulates more weight)
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Location:
sydney
Registered:
January 2003
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 12:43
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i think 15*7 is the optimal size, i had 15*7.5 with 205/50 tyres stretched, and had guard rub on the rear, i believe what ae95 said in terms of tyres size is correct, i had 205/50/15 on the front before and when at full lock the tyre would scrape into the inside arch area.
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Location:
Melbourne
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 13:47
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yeh i was told by c2888 here a while back something like that. And I think I read the same thing in '21st century performance'. Pretty fat book, but very cool read. They have pics to demonstrate it too.
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Don't bring me into this!! 
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Location:
Adelaide
Registered:
May 2003
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Re: [AE86] Wheel size and handling
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Fri, 03 December 2004 21:20
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195/60/14s fit quite nicely, and with Advan A032R control rubber they handle beautifully.
205/50/15s scrub slightly though.
As for tyre sizes, 60 profile can be just as good as 50 profile in my experience if it is set up correctly. Fiddling with tyre pressures can be a bit of a black art, but its a cheap handling corrector, as is having a decent suspension setup.
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Location:
Rockhampton QLD
Registered:
July 2004
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Re: [AE86] Wheel size and handling
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Sat, 04 December 2004 01:42
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| ae95 wrote on Thu, 02 December 2004 20:57 |
15's and 195/50's or 14's and 185/60's are the go
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so will 195/50's fit ok on 15 by 7's or do you have to use 205's?
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Location:
Canberra, ACT
Registered:
September 2002
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Location:
Sydney
Registered:
April 2004
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: [AE86] Wheel size and handling
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Sat, 04 December 2004 02:45
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| 86DRFT wrote on Sat, 04 December 2004 09:42 |
| ae95 wrote on Thu, 02 December 2004 20:57 |
15's and 195/50's or 14's and 185/60's are the go
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so will 195/50's fit ok on 15 by 7's or do you have to use 205's?
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yep
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Location:
Adelaide
Registered:
August 2003
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Re: [AE86] Wheel size and handling
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Sat, 04 December 2004 03:48
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I have 185/55/14 on the front and 185/60/14 on the rear. On a 14x7 rim.
On a AE86 with 8 and 6kg/mm springs..
Whats a ballpark tyre pressure figure you guys would suggest?
I have been playing around with them and can't seem to get it right...
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Banned user
Location:
SA The Drifting State
Registered:
December 2004
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Re: [AE86] Wheel size and handling
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Sat, 04 December 2004 05:18
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With my last sprinter I ran 17 x 8.5 on the rear and 17 x 7 on the front with 215 40 on th front and 235 40 on the rear, and with this combination it was truly sensational, passing GT3 porsches under brakes and keeping up with well sorted race cars around Mallala, I just love the AE86 
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Location:
Melb
Registered:
May 2002
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Re: [AE86] Wheel size and handling
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Sun, 05 December 2004 00:29
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*shrugs*
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