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Old 05-07-2016, 12:48 PM   #361
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I read the GRM article, what I found interesting, is that the 245 gave up 4 mph and 0.7 seconds to the 225 on a 2.39ish time. Sometimes, especially for stockish power levels, smaller is better.
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Old 05-07-2016, 10:03 PM   #362
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GRM believes in us and what we do to publish a magazine about it, know what to test, spend the time and money to test in the hopes that you will buy a subscription, or at least that issue.

Sort of like me publishing free technical information that gets used by everyone in the hopes that folks will throw some business our way.
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Old 05-08-2016, 11:08 AM   #363
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Great article, as usual by the people at GRM. 225 rivals on 15x9 seems hard to beat if you put longivity out of the equation, even for high power cars...
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Old 05-08-2016, 11:20 AM   #364
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The most interesting thing about the article is the update to the rival. Be nice to know a date code for when the tire was changed. I bought mine in March and they could be leftover stock from 15'
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Old 05-08-2016, 12:29 PM   #365
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So I got to pull the front coilovers and check clearance on my NA, Keep in mind I have drift knuckles, I don't know how these will clear with standard knuckles.

To clear the sway bar and control arm (v8roadstet tubular arm, and fm 1.8l sway ) I need to run a 5/8" spacer.

I will need 30mm flares, and also I need to change the bolts on the sway bar brackets to something lower profile like button head or non flange head.

The bumper/fender tab needs to be trimmed and the brace that goes to the chassis removed.

Also the tire rubs the bumper wheel arch, I'm still undecided about running a splitter and air damn setup, so either the bumper will be trimmed or the air damn installed.

All in all not as bad as I thought. No real pounding of metal needed.
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Old 05-08-2016, 02:24 PM   #366
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Quote:
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GRM believes in us and what we do to publish a magazine about it, know what to test, spend the time and money to test in the hopes that you will buy a subscription.
which is why i have a 10 year subscription to grm.
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Old 05-08-2016, 04:30 PM   #367
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^same here! I just ordered it! with a t-shirt too!

!!!
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Old 05-08-2016, 07:24 PM   #368
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Bfg and nitto, please make a 245-40-15 tire
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Old 05-08-2016, 09:13 PM   #369
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Quote:
Originally Posted by bigben View Post
Bfg and nitto, please make a 245-40-15 tire
BFG, I'd love to see a Rival-S. Nitto, meh. The RC-1 does everything better and is cost less. What I'd really like to see is an RE71-R to complement the VR-1. VR-1 on the daily and hooning HPDE car. RE71R for the hard core time trial or autocross builds.
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Old 05-08-2016, 10:09 PM   #370
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Quote:
Originally Posted by Bronson M View Post
The most interesting thing about the article is the update to the rival. Be nice to know a date code for when the tire was changed. I bought mine in March and they could be leftover stock from 15'
You have the current 2015 tire. 2016 is still not in stock in any size. Mine were test tires and I had to mark them so as not to get confused. They did have build dates two weeks apart, but that was irrelevant.

Per one of TR's higher-up's:
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Originally Posted by CAH View Post

We (Tire Rack) received an update from Pete Calhoun (BFG Motorsports Marketing Manager) this week to clarify the situation. The revised tires will have a new part number, the speed rating will be revised from W to V. BFG is still in the pre-production stage for the revised tire and no "new spec" tires have made it into the market yet. The set that Andy H tested for GRM were a pre-production "Test Set".

7 current Rival-S sizes are planned to receive the update, 205/50r15 through 245/40r18 (all 3-rib designs) The wider, 18" sizes will be unchanged. At this time we do not have a firm ETA for the new version, but the indications are late summer for all sizes to become available.
Further, in first-hand convo with TR on Saturday during the One Lap skid pad event, the running changes will appear in each affected size as existing stock is sold-out. This is typical for running changes made in the tire market.

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Originally Posted by wannafbody View Post
I read the GRM article, what I found interesting, is that the 245 gave up 4 mph and 0.7 seconds to the 225 on a 2.39ish time. Sometimes, especially for stockish power levels, smaller is better.
You are confused. That aero-drag comparo was between the 245 VR1 on 9 and 10" wide wheels. Since the extra wheel width is entirely outward, the tire sticks out further into the airstream. That's why I love running dataloggers, 'cuz you find stuff like that. Surprised me how big of a deal it was.
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Old 05-08-2016, 10:41 PM   #371
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About 7 years ago William conducted the tire shrouding test and shared the data with me. Even on a relatively low speed track the differences in terminal velocity were really surprising. One of the reasons supermiatas have that big air dam that shrouds the front tires.
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Old 05-08-2016, 11:05 PM   #372
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Wannafbody lives in a state of confusion. I'm not surprised.

Emilio, was that data published anywhere? Curious how just a simple tire spat would do compared to a full air dam.

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Old 05-09-2016, 01:14 AM   #373
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Quote:
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Wannafbody lives in a state of confusion. I'm not surprised.

Emilio, was that data published anywhere? Curious how just a simple tire spat would do compared to a full air dam.
No it's common sense though. Air hits the tire causes drag and lift. We were just surprised at how much speed differential there was by blocking the front tires that's all.
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Old 05-09-2016, 03:05 PM   #374
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Are the 245s sold out already? They are no longer on the Maxxis website.

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Old 05-09-2016, 05:44 PM   #375
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They were pulled last time they were sold out, and re-added when they got a shipment. They've been selling like hotcakes.
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Old 05-10-2016, 10:20 AM   #376
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Quote:
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Are the 245s sold out already? They are no longer on the Maxxis website.
Temporarily sold out. We have a small shipment arriving this week, which will likely go fast. A larger shipment will arrive towards the end of the month.
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Old 05-12-2016, 02:02 AM   #377
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I checked at the Les Schwab in Snohomish, and they said the VR-1's aren't in their system yet, but they "might" get them. It would be nice, cuz they're the closest shop with a hunter.
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Old 05-12-2016, 08:37 AM   #378
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Would it be wise to shave these for endurance racing/track use?
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Old 05-12-2016, 02:11 PM   #379
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Consensus is that they squirm a lot at full tread depth, shaving will probably help this a great deal. Not my thing though
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Old 05-12-2016, 02:37 PM   #380
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I do think shaving could help performance. Hard to say what will happen to overall tread life.
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