Unofficialbmw.com Forum Index Unofficialbmw.com
The UnofficialBMW BB, answers for your BMW questions.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Toyo RA1, Pro3 and Spec E30 spec tire

 
Post new topic   Reply to topic    Unofficialbmw.com Forum Index -> Racing

Support Unofficialbmw.com :: Download Free Healthy Habits iPhone app!

View previous topic :: View next topic  
Author Message
dale



Joined: 22 Aug 1999
Posts: 3083
Location: Seattle, WA USA

PostPosted: Thu Dec 15, 2005 3:15 pm    Post subject: Toyo RA1, Pro3 and Spec E30 spec tire Reply with quote

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.

==========================

If you've ever wondered about all the markings on the side of a tire, read this:



===========================

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
Back to top
View user's profile Send private message
Steve D



Joined: 09 Aug 2004
Posts: 102
Location: San Diego

PostPosted: Thu Dec 15, 2005 5:08 pm    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message Send e-mail
Tom Olsson
Site Admin


Joined: 03 Nov 2004
Posts: 242
Location: Seattle, WA, US

PostPosted: Thu Dec 15, 2005 5:52 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    Unofficialbmw.com Forum Index -> Racing All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Powered by phpBB © 2001, 2005 phpBB Group