Another tire size question!
08-18-2009, 02:55 PM
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My Ride: 2004 BMW 530i
Right now I'm running 255/40/18's on all four's I believe. Is it okay if I run 245's instead on all fours or would you recommend larger tires on the rear? Thanks
08-18-2009, 04:25 PM
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Originally Posted by turboawd' post='981326' date='Aug 18 2009, 08:17 PM
it depends, what wheels? same wheels front and rear?
normally you dont want to go with a narrower tire, otherwise the rim is more prone to curb damage.
normally you dont want to go with a narrower tire, otherwise the rim is more prone to curb damage.
08-19-2009, 05:30 AM
#5
You are running to wide of a tire. The stock 123 are 8 inches wide and a 245 is what is recomended and is what comes stock on bmw sport package with 123's (530i's )
255 is wayy to stretched on the wheel-you will get better cornering and performance if you use the proper size tire. I mean 255 on 8 inches is not terrible but IMO is the absolutely max of what size you would put on there
255 is wayy to stretched on the wheel-you will get better cornering and performance if you use the proper size tire. I mean 255 on 8 inches is not terrible but IMO is the absolutely max of what size you would put on there
08-19-2009, 06:02 AM
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Originally Posted by mbp727' post='981262' date='Aug 18 2009, 06:55 PM
Right now I'm running 255/40/18's on all four's I believe. Is it okay if I run 245's instead on all fours or would you recommend larger tires on the rear? Thanks
08-19-2009, 06:44 AM
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Model Year: 2004
Originally Posted by luigi524td' post='981941' date='Aug 19 2009, 10:02 AM
Check that - did you replace the stock 245/40x18s with 255's? If you did for certain your speedometer will be off slightly ... check here to determine how the dimensions compare to the stock set-up http://www.miata.net/garage/tirecalcold.html
08-19-2009, 08:25 AM
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Originally Posted by theXman' post='981998' date='Aug 19 2009, 10:44 AM
+1 255 is too big for stock 18". And the meter is definitely off.
OH! That explains why my speedometer reads 63-64 when I'm going 60. The tire kingdom up by me has a special for "sonic" tires I believe? Something with an S. Anyways they're $92 each. Considering my bf's are like $208 this is quite the deal. The salesman told me that they're speed rated H not V which means anything over 120 is dangerous? He added that if the tires were made in this size, they must be safe enough to use on a car needing such size. Should I get these tires? I'm planning on upgrading my wheels when the right deal for 166's or 124's arises so what I have on my 123's isnt SUPER important.
08-19-2009, 08:26 AM
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Originally Posted by theXman' post='981998' date='Aug 19 2009, 10:44 AM
+1 255 is too big for stock 18". And the meter is definitely off.
OH! That explains why my speedometer reads 63-64 when I'm going 60. The tire kingdom up by me has a special for "sonic" tires I believe? Something with an S. Anyways they're $92 each. Considering my bf's are like $208 this is quite the deal. The salesman told me that they're speed rated H not V which means anything over 120 is dangerous? He added that if the tires were made in this size, they must be safe enough to use on a car needing such size. Should I get these tires? I'm planning on upgrading my wheels when the right deal for 166's or 124's arises so what I have on my 123's isnt SUPER important.
08-19-2009, 09:34 AM
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Originally Posted by luigi524td' post='981941' date='Aug 19 2009, 10:02 AM
Check that - did you replace the stock 245/40x18s with 255's? If you did for certain your speedometer will be off slightly ... check here to determine how the dimensions compare to the stock set-up http://www.miata.net/garage/tirecalcold.html
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