Tyre Sizes

technofreak · 08-10-2005, 02:08 PM

Hello boys and girls.

I need to get new tyres my tread has run down too far. But I need some help with knowing what sizes mean and which sizes would fit my rims.
I have 17inch wheels that are 7inches wide. The tyres I have on now are Falken Ziex 215/40ZR17's. I've been looking around for some new tyres and I'm getting confused. I found one tyre whos size is 215/40R17 but then it said for a rim width of 7.5inches. I don't get it. Is it possible for two tyres to have the same size ie. 215/40R17 and to fit on a different width rim? Help please?
What size tyres would fit?

ALso, suggest some good tyres that aren't too expensive either if any of you have any good idea's I'd be happy to hear them. Thanks!

mazdamanik · 08-10-2005, 02:20 PM

I have toyo Proxes T1-R's and they the best ive ever had....you pay a bit mroe for them but its well worth it, the grip level in the dry and the wet is unreal...i believe it is possible that a 215 will fit a 7.5 inch rim, usually there are 2 widths of tyres for evey width in rim i think.....

MitchEG · 08-10-2005, 02:32 PM

I had 205's on 16 x 7.5 rims on my old car, the sidewall is stretched inwards a bit more is all.

Cosmo Dude · 08-10-2005, 04:24 PM

215 = width in mm
40 = tyre wall height expressed as a percentage of the width (86mm)
R is a speed rating of 170km/h Maximum
Z is a speed rating of 300km/h+
17 is the wheel fitment. 17" diamater (431.8mm)

215/40 sounds about right for an Astina. 7" would be the ideal fitment but I've seen 215s living quite happily on narrower rims.

pr1mo · 08-10-2005, 04:29 PM

are you sure your mags arent 7.5" wide because i have a sneaking suspcion that they are. if ubdeed they are then 215/40's are the right tyres for you my friend. if they are only 7" wide then if i were replacing all four i would go for a 205/45 (for comfort) or a 205/40 (readily availible) just ensure that the numbers after all the tyre size numbers are 84 or greater. this is your tyre load rating.

Rupewrecht · 08-10-2005, 06:47 PM

http://www.astinagt.com/forums/showthread.php?t=1770 !

goldsp · 08-10-2005, 07:39 PM

i have currently got TOYO proxes in a 215/35/18 . these i believe are extremely good tyres . Much better then nankangs which i previously had.

i used to have 17x7 rim and 215/40/17 tyres on them with no hassles at all.

project.r.racing · 11-10-2005, 09:18 PM

nankang suck, i agree there, those toyos are great/grippy, i agree there also

I assume you have a BA cos of your pic.
215/40s will fit easily on 7" wide rims, so go out and get them if you want, if you want a bit more comfort, get 215/45s, will be cheaper also as wrx's and most bmw's, import run these now.

Ryan

08-10-2005, 02:08 PM	#1
technofreak Junior Member Join Date: Jun 2004 Location: Melbourne, VIC Car: 1995 Mazda Astina Posts: 69	Tyre Sizes Hello boys and girls. I need to get new tyres my tread has run down too far. But I need some help with knowing what sizes mean and which sizes would fit my rims. I have 17inch wheels that are 7inches wide. The tyres I have on now are Falken Ziex 215/40ZR17's. I've been looking around for some new tyres and I'm getting confused. I found one tyre whos size is 215/40R17 but then it said for a rim width of 7.5inches. I don't get it. Is it possible for two tyres to have the same size ie. 215/40R17 and to fit on a different width rim? Help please? What size tyres would fit? ALso, suggest some good tyres that aren't too expensive either if any of you have any good idea's I'd be happy to hear them. Thanks! __________________ walking bum removed

08-10-2005, 02:20 PM	#2
mazdamanik Senior Member Join Date: May 2004 Location: Rathmines Car: Was an Astina now a Commohore :-( Posts: 903 View Photos By: mazdamanik	I have toyo Proxes T1-R's and they the best ive ever had....you pay a bit mroe for them but its well worth it, the grip level in the dry and the wet is unreal...i believe it is possible that a 215 will fit a 7.5 inch rim, usually there are 2 widths of tyres for evey width in rim i think..... __________________ You can't race what you can't catch!!

08-10-2005, 04:24 PM	#4
Cosmo Dude コスモ Join Date: Dec 2002 Location: Location: Vic Car: Mazda '95 Astina I4, '86 B2K and '10 3 MZR-CD Posts: 7,888 View Photos By: Cosmo Dude	215 = width in mm 40 = tyre wall height expressed as a percentage of the width (86mm) R is a speed rating of 170km/h Maximum Z is a speed rating of 300km/h+ 17 is the wheel fitment. 17" diamater (431.8mm) 215/40 sounds about right for an Astina. 7" would be the ideal fitment but I've seen 215s living quite happily on narrower rims. __________________ My 'stina Hatch Last edited by Cosmo Dude; 08-10-2005 at 08:08 PM.

08-10-2005, 06:47 PM	#6
Rupewrecht Administrator Join Date: Mar 2002 Location: melb.vic.au Car: AZ-1, Astina Hardtop Turbo, BJ Protege, Beetle Posts: 16,525 View Photos By: Rupewrecht	http://www.astinagt.com/forums/showthread.php?t=1770 ! __________________ jdmparts.rupewrecht.com Sourcing your not-quite-overnight parts from Japan WRECHT--\|--SLOWTEGE--\|--BEETLE--\|--SUBSTITUTE--\|--AZ-1

08-10-2005, 07:39 PM	#7
goldsp AstinaGT Regular Join Date: Jan 2005 Location: Maitland Car: 04 wrx Posts: 456 View Photos By: goldsp	i have currently got TOYO proxes in a 215/35/18 . these i believe are extremely good tyres . Much better then nankangs which i previously had. i used to have 17x7 rim and 215/40/17 tyres on them with no hassles at all. __________________ GOLD SP- No Longer Stock As A Rock http://www.astinagt.com/forums/vbgar...do=view&id=799

08-10-2005, 02:32 PM	#3
MitchEG AstinaGT Regular Join Date: Mar 2005 Location: Brisbane, South Car: Cibicu Posts: 324	I had 205's on 16 x 7.5 rims on my old car, the sidewall is stretched inwards a bit more is all.

08-10-2005, 04:29 PM	#5
pr1mo I MUST STOP MAKING STUPID POSTS! Yet I keep on making them. And I wonder why I get banned? Join Date: Mar 2002 Location: DansVille Car: auto Posts: 4,326	are you sure your mags arent 7.5" wide because i have a sneaking suspcion that they are. if ubdeed they are then 215/40's are the right tyres for you my friend. if they are only 7" wide then if i were replacing all four i would go for a 205/45 (for comfort) or a 205/40 (readily availible) just ensure that the numbers after all the tyre size numbers are 84 or greater. this is your tyre load rating.

11-10-2005, 09:18 PM	#8
project.r.racing Senior Member Join Date: Sep 2004 Location: n/a Car: n/a Posts: 10,929	nankang suck, i agree there, those toyos are great/grippy, i agree there also I assume you have a BA cos of your pic. 215/40s will fit easily on 7" wide rims, so go out and get them if you want, if you want a bit more comfort, get 215/45s, will be cheaper also as wrx's and most bmw's, import run these now. Ryan

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