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What Tire size should i get for 18 x 8.5 rims ?

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Old 02-01-2004, 07:16 AM   #1
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Default What Tire size should i get for 18 x 8.5 rims ?

Local tire shop said i should get 245/45 which would look like baloons ..His defense was that we have crappy roads and it would protect the rims. Whats the best size for bad street surfaces and bumpy roads .
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Old 02-01-2004, 07:20 AM   #2
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Default 245/45?! you sure he didn't mean 245/40?

245/45 is the wrong rolling diameter.

you *could* do 245/40 but 235/40 will look a lot better.
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Old 02-01-2004, 07:21 AM   #3
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Default 225-40-18 Y or Z rated

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HELP TO CREATE THE INTERACTIVE AUDI TT CUSTOMIZATION PROJECT -INSTRUCTIONS-
2003 TT 225 Quattro Coupe' Dolomite/Aviator

MODS:
revo
ModShack Stage III (TTDA, ****, 4Bar, BM)
19" x 8.5" Nuvolari Concept Wheels with Dunlop SP Sport Maxx tires
OSIR Smoked Corners
Silver Headlight housings
OSIR Telson
OEM 3.2 rear valance
Bilstein Sports
Eibach Springs
1/2 K-Mac
Forge 007 DV
AWE Boost Gauge
PIAA Fogs
GadgeTT
Forge Strut-top, oil, and water covers
Diesel Geek Ultra Short Shifter
Dietrich GT2 Front Bumper
PPI Rear Bumper
Smoked Side Markers
Custom Grilles
Audi Sport badge valve stem caps
Spacers (8mm front and 14mm rear)
Borla Exhaust

NEED TO ORDER: (AKA, what's left in the plan)
Forge FMIC (with red hoses)
Samco hoses (red)
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Old 02-01-2004, 07:23 AM   #4
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Default 8.5 inches is 225mm why in god's name would he tell you to get tires that would stick out (more)

Trust me, I have stock 18x8.5 rims, and I have stock 225-40-18 tires. They fit just perfect and they look good. No problems with rim damage.
__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HELP TO CREATE THE INTERACTIVE AUDI TT CUSTOMIZATION PROJECT -INSTRUCTIONS-
2003 TT 225 Quattro Coupe' Dolomite/Aviator

MODS:
revo
ModShack Stage III (TTDA, ****, 4Bar, BM)
19" x 8.5" Nuvolari Concept Wheels with Dunlop SP Sport Maxx tires
OSIR Smoked Corners
Silver Headlight housings
OSIR Telson
OEM 3.2 rear valance
Bilstein Sports
Eibach Springs
1/2 K-Mac
Forge 007 DV
AWE Boost Gauge
PIAA Fogs
GadgeTT
Forge Strut-top, oil, and water covers
Diesel Geek Ultra Short Shifter
Dietrich GT2 Front Bumper
PPI Rear Bumper
Smoked Side Markers
Custom Grilles
Audi Sport badge valve stem caps
Spacers (8mm front and 14mm rear)
Borla Exhaust

NEED TO ORDER: (AKA, what's left in the plan)
Forge FMIC (with red hoses)
Samco hoses (red)
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Old 02-01-2004, 07:23 AM   #5
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Default 225 will look pretty stretched on an 8.5" wide rim ...

consider that audi uses 225 on 7.5" wide rims. 235 will look more natural imho.
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Old 02-01-2004, 07:24 AM   #6
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Default no they don't.... that's what I have and it was stock

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HELP TO CREATE THE INTERACTIVE AUDI TT CUSTOMIZATION PROJECT -INSTRUCTIONS-
2003 TT 225 Quattro Coupe' Dolomite/Aviator

MODS:
revo
ModShack Stage III (TTDA, ****, 4Bar, BM)
19" x 8.5" Nuvolari Concept Wheels with Dunlop SP Sport Maxx tires
OSIR Smoked Corners
Silver Headlight housings
OSIR Telson
OEM 3.2 rear valance
Bilstein Sports
Eibach Springs
1/2 K-Mac
Forge 007 DV
AWE Boost Gauge
PIAA Fogs
GadgeTT
Forge Strut-top, oil, and water covers
Diesel Geek Ultra Short Shifter
Dietrich GT2 Front Bumper
PPI Rear Bumper
Smoked Side Markers
Custom Grilles
Audi Sport badge valve stem caps
Spacers (8mm front and 14mm rear)
Borla Exhaust

NEED TO ORDER: (AKA, what's left in the plan)
Forge FMIC (with red hoses)
Samco hoses (red)
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Old 02-01-2004, 07:25 AM   #7
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Default actually, 8.5 inches is 215.9mm.

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Old 02-01-2004, 07:26 AM   #8
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Default what oem audi tt rim is 8.5" wide?

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Old 02-01-2004, 07:27 AM   #9
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Default THIS is a 225-40-18 ContiSportContact2 on my stock 18x18.5 rims.... NO STRETCH!

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HELP TO CREATE THE INTERACTIVE AUDI TT CUSTOMIZATION PROJECT -INSTRUCTIONS-
2003 TT 225 Quattro Coupe' Dolomite/Aviator

MODS:
revo
ModShack Stage III (TTDA, ****, 4Bar, BM)
19" x 8.5" Nuvolari Concept Wheels with Dunlop SP Sport Maxx tires
OSIR Smoked Corners
Silver Headlight housings
OSIR Telson
OEM 3.2 rear valance
Bilstein Sports
Eibach Springs
1/2 K-Mac
Forge 007 DV
AWE Boost Gauge
PIAA Fogs
GadgeTT
Forge Strut-top, oil, and water covers
Diesel Geek Ultra Short Shifter
Dietrich GT2 Front Bumper
PPI Rear Bumper
Smoked Side Markers
Custom Grilles
Audi Sport badge valve stem caps
Spacers (8mm front and 14mm rear)
Borla Exhaust

NEED TO ORDER: (AKA, what's left in the plan)
Forge FMIC (with red hoses)
Samco hoses (red)
Greyhaven7 is offline   Reply With Quote
Old 02-01-2004, 07:28 AM   #10
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Default look at my post above....

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HELP TO CREATE THE INTERACTIVE AUDI TT CUSTOMIZATION PROJECT -INSTRUCTIONS-
2003 TT 225 Quattro Coupe' Dolomite/Aviator

MODS:
revo
ModShack Stage III (TTDA, ****, 4Bar, BM)
19" x 8.5" Nuvolari Concept Wheels with Dunlop SP Sport Maxx tires
OSIR Smoked Corners
Silver Headlight housings
OSIR Telson
OEM 3.2 rear valance
Bilstein Sports
Eibach Springs
1/2 K-Mac
Forge 007 DV
AWE Boost Gauge
PIAA Fogs
GadgeTT
Forge Strut-top, oil, and water covers
Diesel Geek Ultra Short Shifter
Dietrich GT2 Front Bumper
PPI Rear Bumper
Smoked Side Markers
Custom Grilles
Audi Sport badge valve stem caps
Spacers (8mm front and 14mm rear)
Borla Exhaust

NEED TO ORDER: (AKA, what's left in the plan)
Forge FMIC (with red hoses)
Samco hoses (red)
Greyhaven7 is offline   Reply With Quote
Old 02-01-2004, 07:32 AM   #11
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Default i thought those were 7.5" wide. where did you read 8.5"?

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Old 02-01-2004, 07:33 AM   #12
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Default Local shop wants to get rid off stocked 245/45s IMO. Go with 225/40.

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Old 02-01-2004, 07:37 AM   #13
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Default Re: 245/45?! you sure he didn't mean 245/40?

These are 245/45 on 18 x 8 i think (The TT ) , the tires im asking for are for the momo rims , i think the Oettinger REs are 18x8 and thats the tire size thats installed .

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Old 02-01-2004, 07:39 AM   #14
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Default The guy is so full of crap. What kind of a stupid dimension is that? It'll throw totally off aspect

ratios. Sidewall will be a lot bigger. Jesus, what an a$$.
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Old 02-01-2004, 07:41 AM   #15
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Default 225/40 or 235/40

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some pics of the car here

English is not my first language so my grammar and spelling might be off, please excuse this.
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Old 02-01-2004, 07:44 AM   #16
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Default good to see you around :-)

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Old 02-01-2004, 07:45 AM   #17
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Default and treadwidth is measured from the beginning of the tread om the sidewall over the tire and down...

... to the end of the tread on the sidewall on the other side of the tire

therefor the treadwidth should be a bit more than the actual width of the rim
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some pics of the car here

English is not my first language so my grammar and spelling might be off, please excuse this.
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Old 02-01-2004, 07:45 AM   #18
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Default 245/45 is totally wrong. It will cause faulty speedo reading, and throw off aspect ratios. Look link

and calculate. The sidewall will be to big compared with your stock tires, and that's catastrophic.
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Old 02-01-2004, 07:48 AM   #19
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Default I'm pretty much always around, just not always posting

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some pics of the car here

English is not my first language so my grammar and spelling might be off, please excuse this.
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Old 02-01-2004, 08:01 AM   #20
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Default that's odd. usually car companys put on tires that are a bit too wide...

... cus' the ride gets smoother, especially on larger rims
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English is not my first language so my grammar and spelling might be off, please excuse this.
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Old 02-01-2004, 08:01 AM
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