2009 FS

Arthur McDonald · **Joined:** Fri Aug 29, 2003 1:54 am **Posts:** 2052

Opinions on running 275/40-17s on 17x8 rims? I know that the manufacturers recommend at least 9 inch rims for that width, but I recall reading that the 2004 national FS champ ran that combo. Besides the obvious challenge presented to the person mounting the tire, how bad are the downsides? Handling problems? Tire wear problems?

Dustin Fredrickson · **Posted:** Tue Feb 03, 2009 10:25 am

Not really directly related, but we ran 225/45/15 Hoosiers on 15x6 wheels on the Miata. Doing the math, the 225 and 275's should be almost exactly 2" difference in Width. You'll also have ~10% more sidewall height to pull that bead into the rim, so I'd think it'd be doable. Of course, there's one or two other slight differences between a Miata and a Mustang.....

Aaron Buckley · **Posted:** Tue Feb 03, 2009 10:37 am

While it may not be optimal, and the 2004 car was a different chassis, it'll be fine. Feinberg and Spratte ran 275's on 15x6 rims with no issues and we put 295's on 8.5" rims and 325's on 10" rims, so I would be looking to squeeze as much as you can on. - AB

Karl Shultz · **Posted:** Tue Feb 03, 2009 1:44 pm

Arthur McDonald wrote:

Opinions on running 275/40-17s on 17x8 rims? I know that the manufacturers recommend at least 9 inch rims for that width, but I recall reading that the 2004 national FS champ ran that combo. Besides the obvious challenge presented to the person mounting the tire, how bad are the downsides? Handling problems? Tire wear problems?

I may have a spare 275-40-17 under the house if you want to try it.

Art, I've got 275s on the back of the S2000, on 8.5" rims. Mark told me it was actually pretty easy to mount them. From what I understand though, Kumhos are probably out - Aaron can talk to this better than I can, but apparently, Kumhos don't like being wedged onto small wheels.

I can't talk to the tire wear thing though. I have the front tires flipped at roughly 40 runs, and now that I'm doing that, I get about 90 runs out of a set of Hoosiers. The fronts cord before the rears on the S2000, but the rears follow so closely, I just replace them in sets of four.

Aaron Buckley · **Posted:** Tue Feb 03, 2009 2:04 pm

Yeah, Hoosier mount up easy due to a much less stiff sidewall. The Kumhos have a very stiff sidewall and bead, which tend to "kink". Getting them to take air with the kink, especially when it's less than 60 degrees, is difficult.

The nice thing about putting too much Hoosier on a skinnier than optimal rim is that it rounds the shoulders of tire due to the pinch and tends to help cars that car camber limited. On the Crossfire, when we ran 245/35/18 Hoosiers on the 18x7.5" fronts, it gave nice square shoulders, that would hold up about 12 autocross runs before cording :evil:

When we took the same rim and shoehorned a 285/30/18, we could run 30 runs prior to cording and could flip them and get another 30. - AB

Donnie Barnes · **Posted:** Wed Feb 04, 2009 12:28 am

Another reason the Hoosiers mount easier is the "rim protector" setup. The bead is actually narrower from inside to inside on a Hoosier than on a similarly sized Kumho. I think the bead area is also thinner on a Hoosier (not just the entire sidewall), which prevents the kink.

--Donnie

Bernie Baake · **Posted:** Wed Feb 04, 2009 8:50 am

If you lay the Khumo's out in the sun for about an hour, or heat them with a suitable source (moderate to low heat) they will go on easier!!!!

Aaron Buckley · **Posted:** Wed Feb 04, 2009 10:42 am

Bernie Baake wrote:

If you lay the Khumo's out in the sun for about an hour, or heat them with a suitable source (moderate to low heat) they will go on easier!!!!

Sure, but there is not enough sun in February to mount them. They're just plain evil

- AB

Chuck Frank · **Posted:** Wed Feb 04, 2009 11:21 am

I agree, you shouldn't have any problems mounting up that wheel tire combo with Hoosiers. We have been running 295 35 18s on a 18x8 wheel for two years now. I do bring them inside overnight and transport them in a heated vehicle to the tire mounter along with a dozen donuts in the early spring tho, makes him a lot more friendly later in the year.

Arthur McDonald · **Joined:** Fri Aug 29, 2003 1:54 am **Posts:** 2052

FYI - I found two Ford part numbers for inexpensive (<$20) TPMS "training tools":

8C2Z-1A203-A <-- this one comes standard on F-250+ and E-150+ trucks. http://teamfordparts.com/partlocator/in ... eid=214270

8C2T-1A203-AB

Looks like the training procedure involves some key-on-key-off action and horn honking, but at least you can do it yourself.

RodneyWright · **Posted:** Wed Feb 11, 2009 9:45 am

Arthur McDonald wrote:

FYI - I found two Ford part numbers for inexpensive (<$20) TPMS "training tools":

8C2Z-1A203-A <-- this one comes standard on F-250+ and E-150+ trucks. http://teamfordparts.com/partlocator/in ... eid=214270

8C2T-1A203-AB

Looks like the training procedure involves some key-on-key-off action and horn honking, but at least you can do it yourself.

I've decided to take mine off and put them into one of the PVC style pressure containers that are being built cheap w/ big box store parts. I'll put it under the spare tire and be done with it.

Checking w/ the local ford dealer off of 410, they want $50 per strap. No way I'm going to spend that money. In talking w/ Jeb at discount tire, they sell a TPMS strap kit for all 4 tires for less than ~$50.

Dustin Fredrickson · **Posted:** Wed Feb 11, 2009 11:36 am

RodneyWright wrote:

I've decided to take mine off and put them into one of the PVC style pressure containers that are being built cheap w/ big box store parts. I'll put it under the spare tire and be done with it.

Could the spare itself be used for this? I don't know if you get all the bands around on the one wheel, or get more than one sensor on a single band?

Jason Mauldin · **Posted:** Wed Feb 11, 2009 11:41 am

RodneyWright wrote:

Arthur McDonald wrote:

FYI - I found two Ford part numbers for inexpensive (<$20) TPMS "training tools":

8C2Z-1A203-A <-- this one comes standard on F-250+ and E-150+ trucks. http://teamfordparts.com/partlocator/in ... eid=214270

8C2T-1A203-AB

Looks like the training procedure involves some key-on-key-off action and horn honking, but at least you can do it yourself.

I've decided to take mine off and put them into one of the PVC style pressure containers that are being built cheap w/ big box store parts. I'll put it under the spare tire and be done with it.

That's such a simple and effective method of dealing with the problem. Assuming that the monitoring system can't just be disabled?

Michael Westerfield · **Posted:** Wed Feb 11, 2009 11:43 am

Jason Mauldin wrote:

That's such a simple and effective method of dealing with the problem. Assuming that the monitoring system can't just be disabled?

I haven't heard anything yet about it being disabled. There is also the debate is to if the sensors will go to sleep after sometime.

I'm glad I don't have the IUP like you boys. If it really bothers me I can just pull the bulb or LED as I don't have the message center that screams at you.

RodneyWright · **Posted:** Wed Feb 11, 2009 1:04 pm

Dustin Fredrickson wrote:

RodneyWright wrote:

I've decided to take mine off and put them into one of the PVC style pressure containers that are being built cheap w/ big box store parts. I'll put it under the spare tire and be done with it.

Could the spare itself be used for this? I don't know if you get all the bands around on the one wheel, or get more than one sensor on a single band?

I thought about that as well. In talking w/ Jeb, it sounds like the monitor itself just slides onto the band, so I don't think it would be an issue using a single band for all monitors. The trick would be making sure you could mount/dismount the spare tire.

As for Michael's comment on going to sleep, I guess you take the canister out every now and then and swing it on the end of a rope? Do these things really use the ABS sensor as part of their logic to determine a low pressure situation on a tire? That's assuming a low pressure tire will have more revolutions than a inflated tire and set off the warning.

You know, all of this silly BS could have been avoided if stupid people and lawyers stayed out of this. Because folks don't know how to read a car owners manual and use a pressure gauge to check tires, we now need the gov to step in and do this for us :roll:

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