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WhiteOut
Sun, Jan-23-2005, 10:47:28 PM
I have stock 18's with Michelin Pilots - I need new tires. I have a couple questions

Are there any tires that last longer that ~12k-14k miles on stock rims? How about if I changed rims - any tires that last longer?

Second - or third question (depending on how you look at it) what should I look to pay for a new set of Michelin Pilots and where is the best place to buy?

Thanks in advance.

SpecialK
Sun, Jan-23-2005, 11:32:50 PM
Jump into this conversation: http://www.m3forum.net/m3forum/showthread.php?t=53665

mmmpowr
Sun, Jan-23-2005, 11:45:18 PM
I have stock 18's with Michelin Pilots - I need new tires. I have a couple questions

Are there any tires that last longer that ~12k-14k miles on stock rims? How about if I changed rims - any tires that last longer?

Second - or third question (depending on how you look at it) what should I look to pay for a new set of Michelin Pilots and where is the best place to buy?

Thanks in advance.

Wheels have nothing to do with how long a tire lasts. Tire wear depends on the tire compound, your driving habits, alignment specs and tire pressure. Choose a tire like the Toyo T1-S with a higher tread wear rating and they will possible last longer than the oem Michelins.

WhiteOut
Mon, Jan-24-2005, 03:20:17 AM
Couple questions - where's a good place to get the toyos. Also can someone explain the aspect ratio rating of the tire?

Also what width can I go for with stock 18s?
Correct me if i'm wrong - the stock size is
225/45-18 Front

255/40-18 Rear


I read someone saying he was running
245/40-18fr and 275/35-18 rear

will those fit on oem 18"s?


Final clarification - When I was talking about changing rims - I meant are there tire types I can get with a new rim that I can't get with the OEMs that are better than OEM tires? (hope that's not too confusing)

ninook
Mon, Jan-24-2005, 03:38:10 AM
Couple questions - where's a good place to get the toyos. Also can someone explain the aspect ratio rating of the tire?

Aspect ratio is expressed as a percentage of the tread width.
For example: a 275/30R19 is a 275 millimeter wide tire with a sidewall height equal to 30% of the 275 millimeters or .3 x 275 which equals 82.5 mm.
Normally when you go wider on a tire say from a 255/35 18 to a 275/30 19, you should try to keep the circumference of the tire the same or slightly smaller. The difference in the sidewall height is (255x.35)-(275x30) or 89.25-82.5= 6.75mm
If you kept the same aspect ratio of 35, then the 275 tire sidewall would be 7mm taller than the 255. This would cause greater flex in the sidewall affecting handling. Don't forget to multiply by two for total tire height increase. So this tire with a 7mm taller sidewall would actually be 14mm taller overall in diameter, or 14/25=.56 inches taller. :wave:

mmmpowr
Mon, Jan-24-2005, 03:52:01 AM
Couple questions - where's a good place to get the toyos.

http://www.edgeracing.com/cmdtoyo
Toyo's are just one example, there are many different brands available.

Also can someone explain the aspect ratio rating of the tire?

Also what width can I go for with stock 18s?
Correct me if i'm wrong - the stock size is
225/45-18 Front

255/40-18 Rear

Read this link for a general idea as to the aspect ratio and dimensions:
http://www.tirerack.com/tires/tiretech/general/size.jsp

Roughly the diameter should range from 25.5" to 26.0" diameter. Different manufactures will have slight variations as to their actual size even though they may be listed as the same size.

I read someone saying he was running
245/40-18fr and 275/35-18 rear

will those fit on oem 18"s?

In general yes they will fit, but you need to verify the spec of each tire manufacturer. They will have a range of what tire width their tires will fit and an ideal with. For example here is a spec for Toyo T1-S and Michelin PS2:

http://www.toyo.com/tires/tire_specsheet.cfm?id=2
http://www.michelinman.com/assets/pdfs/doc_pilotsportps2.pdf

Final clarification - When I was talking about changing rims - I meant are there tire types I can get with a new rim that I can't get with the OEMs that are better than OEM tires? (hope that's not too confusing)

Of course there are different tires you can put on the Stock wheels.

WhiteOut
Mon, Jan-24-2005, 04:05:29 AM
Thanks for all the help :beer:

WhiteOut
Mon, Jan-24-2005, 05:38:05 AM
This is how I've broken down the tires - I'm looking for a good daily driver so the 320 Treadwear on the Yokohama's seem very appealing. What do you think of them? I heard a lot of good th inks about the Toyos but my question is will the Yokohama's last me significantly longer because of the higher treadwear?

Kumho ECSTA MX.
676.30 Shipped (220 Treadwear)

Yokohama AVS dB-S2
751.44 Shipped(320 Treadwear)

FALKEN FK-451
724.48 Shipped (280 treadwear)

TOYO TS1s
795.42 Shipped (280 treadwear)

Michelin PS2s
968.04 Shipped

cowboy bebop
Mon, Jan-24-2005, 05:49:42 AM
this might also help;
http://www.miata.net/garage/tirecalc.html

shaolin
Mon, Jan-24-2005, 05:58:36 AM
I changed my tire size from oem 255/40 to 275/35. The tire diameter is a little smaller. Subsequently, my speedometer seems to be about 9% higher than my actual speed. Is there anyway to adjust this?

Also, does having smaller tires have the same effect as having higher gear ratios? Will this give my car more torque?

Fat Albert
Mon, Jan-24-2005, 06:08:41 AM
if i want to put 235 front and 265 rear, what will be the correct spec?
235/40/18 and 265/35/18?!

phEight
Mon, Jan-24-2005, 06:43:34 AM
This is how I've broken down the tires - I'm looking for a good daily driver so the 320 Treadwear on the Yokohama's seem very appealing. What do you think of them? I heard a lot of good th inks about the Toyos but my question is will the Yokohama's last me significantly longer because of the higher treadwear?

Kumho ECSTA MX.
676.30 Shipped (220 Treadwear)

Yokohama AVS dB-S2
751.44 Shipped(320 Treadwear)

FALKEN FK-451
724.48 Shipped (280 treadwear)

TOYO TS1s
795.42 Shipped (280 treadwear)

Michelin PS2s
968.04 Shipped
Sorry I cannot help you out much, but I have Yokohama tires on my Audi and I can't say anything but good things about em, if you do decide to go with Yokohama, I'm sure you wouldn't be disappointed with them. :beer:

sg333e
Mon, Jan-24-2005, 02:33:03 PM
I changed my tire size from oem 255/40 to 275/35. The tire diameter is a little smaller. Subsequently, my speedometer seems to be about 9% higher than my actual speed. Is there anyway to adjust this?

Also, does having smaller tires have the same effect as having higher gear ratios? Will this give my car more torque?

Yes, that's exactly what it does. Good catch. All final gearing is genericized from a set tire height. When you change that, it does have an effect. I had an old car with 3.73's that ran more like 3.91 because the rear tires were only 26" tall instead of 28.5.

Red330I
Mon, Jan-24-2005, 03:21:53 PM
Toyo T1S or Michelin PS2 :thumbsup: Both are well worth the price.

Kemo
Mon, Jan-24-2005, 04:12:13 PM
I had the Yokohama pilot sport on my Audi TT and they were great tires. I could get about 25,000 miles on them. Just make sure you get an alignment done when you get the new tires. I forgot to have this done and after 3500 miles the tread of the outside of the tire was completly bare.

Need4Spd
Tue, Jan-25-2005, 02:07:08 AM
I read someone saying he was running 245/40-18fr and 275/35-18 rear What I understand is that instead of this, run OEM size rear tires in front, which are 255/40-18 and 275/35-18 rr. Supposedly these fit on stock 18 in. wheels but you need to know that some tires run "big" for a given size and others smaller so your experience may vary. This gives you wider tires all around with only having to buy 2 new tires. BTW, 275/35-18 is the OEM size for the rears on M5s.

zipperX
Tue, Jan-25-2005, 02:16:13 AM
if i want to put 235 front and 265 rear, what will be the correct spec?
235/40/18 and 265/35/18?!

that's a good question, i was thinking of doing the same with a set of PS2s on OEM 18" rims. has anyone done this/liked the results?