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dale
Joined: 22 Aug 1999 Posts: 3087 Location: Seattle, WA USA
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Posted: Thu Dec 15, 2005 3:15 pm Post subject: Toyo RA1, Pro3 and Spec E30 spec tire |
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Both Pro3 and SpecE30 are using the Toyo RA1 as a spec tire.
Some more info on the tire here:
http://www.toyo.com/tires/tire_lines/high_perf/ra1.html
- High-grip tread compound dispersed in Solution SBR compound for enhanced grip in both wet and dry, plus uniform wear.
- Nylon cap and edge plies to maintain optimum footprint shape and grip at high speeds.
- Two-ply rayon casing construction for thermal stability at high speeds.
- Base compound to resist heat at high speeds.
- Special sidewall compound to protect casing plies and provide heat resistance at high speeds..
- Free floating steel cord side ply for sidewall rigidity, cornering stability, and steering response.
- Two-ply rayon casing for thermal stability at high speeds and sidewall rigidity when cornering.
- V and Z speed-rated (depending on size)
- UTQG Treadwear 40
- UTQG Traction A
- UTQG Temperature A
- 160 F to 220 F tire temp
- High 30's to Low 40's (PSI)
- 2.0 degrees to -5.0 degrees of camber
- The degree of negative camber required to get the most performance out of the RA1 can often lead to inside shoulder wear.
- To maximize tire life, the tire should be dismounted from the wheel and flipped (move inside shoulder to the outside) when the tire is about half way worn.
- The directional nature of the RA1 tread pattern is only applicable for wet conditions to optimize water drainage. If they are being used in dry conditions, the direction of rotation does not matter.
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If you've ever wondered about all the markings on the side of a tire, read this:
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Toyo tire specs for RA1
Tire Size Product Code Rim Width Range (inch) Tire Weight (lbs.) Tread Depth Tread Width Inflated Dimensions Static Loaded Radius (inch) Max Load (lbs.) Max Pressure (PSI) Revs
Per Mile Overall Diameter (inch) Overall Radius (inch) Overall Width (inch)
185/60R13 80V 236680 5.0-5.5-6.5 18 8 21.7 7.5 10.0 992 44 1010
205/60R13 86V 236700 5.5-6.0-7.5 20 8 22.6 8.2 10.4 1158 44 970
205/55R14 85V 236870 5.5-6.5-7.5 21 8 22.9 8.3 10.0 1135 44 955
225/50R14 89V 236900 6.0-7.0-8.0 23 8 22.9 9.0 10.5 1279 44 955
225/45R15 236970 7.0-7.5-8.5 23 8 22.9 9.0 10.6 1201 44 908
205/50ZR15 236840 5.5-6.0-7.5 20 8 23.0 8.3 10.6 1135 44 917
225/50ZR15 236830 6.0-7.0-8.0 23 8 23.7 9.1 10.9 1323 44 886
205/55ZR16 236850 5.5-6.5-7.5 23 8 24.8 8.4 11.4 1235 44 853
225/50ZR16 236890 6.0-7.0-8.0 23 8 24.8 9.0 11.2 1390 44 853
P255/50ZR16 236880 7.0-8.0-9.0 27 8 26.06 10.4 11.7 1687 44 815
245/45ZR16 236800 7.5-8.0-9.0 25 8 24.6 9.6 11.2 1477 44 861
235/45ZR17 236820 7.5-8.0-9.0 25 8 25.4 9.3 11.6 1488 44 834
205/40ZR17* 236750 7.0-7.5-8.0 18.8 8 23.4 8.5 11.0 1102 50 887
235/40ZR17 236760 8.0-8.5-9.5 23.8 8 24.4 9.6 11.4 1323 44 852
255/40ZR17 236770 8.5-9.0-10.0 26 8 25.1 10.2 11.7 1477 44 828
275/40ZR17 236780 9.0-9.5-11.0 29.1 8 25.67 10.9 10 1653 44 812
205/50R17 236740 5.5-6.5-7.5 23.8 7.6 25.2 8.31 11.7 1279 44 823
225/40ZR18 256790 7.5-8.0-9.0 23.1 8 25.1 9.2 9.8 1389 50 827
275/35ZR18 236710 9.0-9.5-11.0 29.6 8 25.55 10.94 12 1521 44 812
335/30ZR18 236720 11.5-12.0-13.0 34.2 8 25.94 13.5 12 1874 44 803
245/40R18 236690 8.0-8.5-9.5 25.4 7.6 25.59 9.65 12.0 1433 44 812
305/35R18 236730 10.0-11.0-12.0 32.0 7.6 26.30 12.48 12.2 1819 44 790
*Indicates reinforced. Bold designates measuring rim width. When a V, W or Y appears in the service description, maximum speed capability is as follows: V= 149mph, W= 168mph, Y= 186mph. All Toyo brand tires are subject to continuous development.
Toyo Tire (U.S.A.) Corporation reserves the right to change construction, materials or specifications without notice or obligation. Contact your Toyo dealer or Toyo Tires for current information. _________________ http://www.unofficialbmw.com
UnofficialBMW.com Webmaster
dale@unofficialbmw.com
sold in 2016
87 325 5spd eta |
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Steve D
Joined: 09 Aug 2004 Posts: 102 Location: San Diego
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Posted: Thu Dec 15, 2005 5:08 pm Post subject: |
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what size does Pro 3 use? spec e30 uses 205's, though I normally use 225's & run in either GTS or with BMW CR. |
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Tom Olsson Site Admin
Joined: 03 Nov 2004 Posts: 242 Location: Seattle, WA, US
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Posted: Thu Dec 15, 2005 5:52 pm Post subject: |
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Our legal sizes are 205-50/14, 225-50/14, 205-50/15, or 225-50/15. Most of us are running the 225/14's, as 15" just became legal for 2006. _________________ 07 335i, 91 318is, 87 325is race car #55 Pro-3 |
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