245/50-16
03-14-2013, 03:47 PM
#16
Three Wheelin'
03-14-2013, 04:07 PM
#17
Nordschleife Master
03-15-2013, 12:32 AM
#18
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You can also run a 225x50 on the 8 inch rim......actually works BETTER in snow ! the tread width is only slightly less but has correct sidewall height. The 245x50 makes the car look a little odd from the side somewhat like a wanna be drag racer with bigs and littles.
06-21-2013, 05:16 PM
#19
Cruisin'
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Not going to willingly part with ClubSport rims on my '89 928GT. And ZRi, RE-11, R1R are gone, gone and gone. Sooo, called Tire Rack for a recommendation a couple days ago. Suggestion is BF Goodrich g-Force Sport COMP-2, which I see is #1 (of 28 tested) Ultra High Perf. Summer tire. 225/50-16 F and 255/50-16 rear. By my calc, looks to be 0.7" taller (245 x 0.45 = 110.25, while 255 x 0.50 = 127.5. Diff is 17.25mm, or 17.25/25.4 = 0.679" ANYWAY, I wonder about 5 mm (each side) in rear rubbing the "cringed" inside of fender. Any opinion/advice/experience?? Thanks.
06-21-2013, 05:21 PM
#20
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Not going to willingly part with ClubSport rims on my '89 928GT. And ZRi, RE-11, R1R are gone, gone and gone. Sooo, called Tire Rack for a recommendation a couple days ago. Suggestion is BF Goodrich g-Force Sport COMP-2, which I see is #1 (of 28 tested) Ultra High Perf. Summer tire. 225/50-16 F and 255/50-16 rear. By my calc, looks to be 0.7" taller (245 x 0.45 = 110.25, while 255 x 0.50 = 127.5. Diff is 17.25mm, or 17.25/25.4 = 0.679" ANYWAY, I wonder about 5 mm (each side) in rear rubbing the "cringed" inside of fender. Any opinion/advice/experience?? Thanks.
06-21-2013, 08:43 PM
#25
Nordschleife Master
06-21-2013, 09:18 PM
#26
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If it is really dangerous to drive with a 3% diameter difference, half the 928's out there should be taken off the road. Now! Think of the children.....</sarcasm>
06-21-2013, 11:44 PM
#27
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Is this size really hard to find?
Tirerack offers nine different models: http://www.tirerack.com/tires/TireSe...50&diameter=16
I suppose it's a bit far to go but you could have them delivered to Wellesley Island Building Supply via KINEK.
As an alternative, try http://www.1010tires.com
Tirerack offers nine different models: http://www.tirerack.com/tires/TireSe...50&diameter=16
I suppose it's a bit far to go but you could have them delivered to Wellesley Island Building Supply via KINEK.
As an alternative, try http://www.1010tires.com
06-22-2013, 08:29 PM
#28
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OK, let me try again: OE on '89 928 GT (ClubSport) is 225/50-16 F and 245/45-16 R. 245/45-16 tires are nearly "unobtainable." Tire Rack recommended 255/50-16. NOTE: 245/50-16 max rim width is 8.5" (9" OE ClubSport rrear rims). Bertrand mentioned "diameter variance" between 245/45-16 to 255/50-16 as 5.5%. (I get 5.7 using Toyo Proxes RA1 245/45-16 because I could NOT find specs for Fuzion ZRi), but close enough for government work. I am surprised Tire Rack would recommend anything that exceeds "manufacturers' recommendation, but I will pursue this further. I DID find set of 225/50-16ZR and 245/45-16ZR tires with W speed rating. They have UTQR treadwear rating of 420/280 (not sure if that is front/rear, or what). These are Primewell PZ900 tires. Mostly positive ratings from users and UNANIMOUS "best for the (cheep) price." In spite of the 40,000 mile wear guarantee, most are getting 15,000 to 30,000 miles.
06-22-2013, 10:27 PM
#29
Nordschleife Master
I can't believe they'd recommend that either.
Check out the tire specs for tires that sound good. Here's a high-end tire with lots of options:
Michelin Pilot A/S Plus tire specs and click the "specs" tab.
You can see the rim width the manufacturer suggests. For the 225/50/16 it will go on 6" through 8" rims so you can put them all around. You could go with a 245/50/16 in the rear. That's be ((836-810)/836) or 3.1% too tall. That'll raise the back 0.4" because the car is raised by the radius which is half the diameter.
When in doubt, just get the 225 size. Sure, you lose 20mm of tread width in the rear but you get the right size and your choices go from a few to a huge selection. Tire rack list 60 tires models in that size.
Check out the tire specs for tires that sound good. Here's a high-end tire with lots of options:
Michelin Pilot A/S Plus tire specs and click the "specs" tab.
You can see the rim width the manufacturer suggests. For the 225/50/16 it will go on 6" through 8" rims so you can put them all around. You could go with a 245/50/16 in the rear. That's be ((836-810)/836) or 3.1% too tall. That'll raise the back 0.4" because the car is raised by the radius which is half the diameter.
When in doubt, just get the 225 size. Sure, you lose 20mm of tread width in the rear but you get the right size and your choices go from a few to a huge selection. Tire rack list 60 tires models in that size.
06-22-2013, 11:53 PM
#30
Three Wheelin'
