Tire Size

[GotMach1]

how big can we go on the machs?
I'm talking new rims and tires
I want to put nittos on the back for the track but how large can i go? 300+?

thanks

[Brain]

I don't know.

Having said that, I am taking my rims tomorrow to be widened and have order BF Goodrich DR in 275/40R17.

Will have picutres in about 3 weeks.

Brain

[dock44]

Like on GT's, Im pretty sure you can go 315s on back with no problems on a 10 or 11 in. rim. But keep in mind that all 315s are not the same width. I personally like Roush's setup best. They fit an 18x10 wheel with 295x35s in back and 18x9 wheel with 265x35s up front. Me likes a lot.

[wannabDSG]

I spoke to the manager of a Discount Tire store yesterday and he said that 275/40's would fit the 8" Mach 1 wheel.

[funk]

I have 275/40's on the back on 9 1/2 inch wheels. But i'm going with 315's next. Also if you change wheels completly like I did. Make sure the new wheels will fit the on the front. I had some clearance problems with the brakes. I had to shave the Calipers down some.

[1 BULLITT]

Originally posted by wannabDSG
I spoke to the manager of a Discount Tire store yesterday and he said that 275/40's would fit the 8" Mach 1 wheel.

Mainly for safety issues, it is suggested that shold be 255s is the widest tire on a 8"rim. For the 265s and 275s tires, 9" rims are recommended.

[Dragman]

Anyone have experience running 245/45x17 front and 275/40x17 rear on 17x9 rims?? Any problems with bump steer and oversteer in the twisties or on the hwy? I just put on a set of 17x9 chrome 2003 Cobra wheels and was thinking of mounting 275/40x17's on the back...

[Tomcat427]

I have had 275/40/17's (KDWS') on the rear (stock rims) for 3500 miles now. No problems a all. I was told, and read somewhere, that if you stay at or above 80% (rim width/tire width) that you should not have any problems.


I had made several runs at the track with the tire pressure as low as 26psi. No problems there either.

[starscream]

Originally posted by dock44
Like on GT's, Im pretty sure you can go 315s on back with no problems on a 10 or 11 in. rim. But keep in mind that all 315s are not the same width.

How can that be? 315 is the width in mm (millimeters). If they are not the same width then someone is making the wrong size tires, because all 315s should be 315 mm wide.

[bkeen]

Pictures please!

:THUMBSUP:

[dock44]

It's what I've been told. I've never taken out the ruler myself. I've been told that some 315s rub and some don't. I don't believe the manufacturers are held to exact specs when making tires. If you look at the same tire specs from different manufacturers, you'll see they differ slightly with overall height, section width, tread width etc.. I'm talking slightly different here. The type of tread pattern they use, rubber compound, sidewall stiffness all add up to slight differences, which I suppose could be the difference between a worry free fit, and a fit that slightly contacts.

[starscream]

Originally posted by dock44
It's what I've been told. I've never taken out the ruler myself. I've been told that some 315s rub and some don't.

I wonder if the people who say there's differences between the 315s were comparing them on two different sets of rims, because with offset and backspacing differences you could have one set rubbing and the other set not at all even if the tires are exactly the same size.

If you look at the same tire specs from different manufacturers, you'll see they differ slightly with overall height, section width, tread width etc.. I'm talking slightly different here. The type of tread pattern they use, rubber compound, sidewall stiffness all add up to slight differences, which I suppose could be the difference between a worry free fit, and a fit that slightly contacts.

I could see slight differences, but I'd be more worried about having the right rims with wide tires over slight differences in the rubber. Oh well.

Cheers. :CHEERS:

[Talladega]

Brain,
who's widening your wheels and for how much?
thanks
T

[Brain]

Originally posted by Talladega
Brain,
who's widening your wheels and for how much?
thanks
T

I am having it done by Wheels America. http://www.fixrim.com/ It is costing $400. Not cheap, but I might go to 315's and I want to maintain the stock looks.

I have never had anything done by the them but my brother-in-law has had 3 wheels straightened and was very satisfied. To widen, they cut the back of the wheel off and weld a wider section on. I will post pictures when complete (about 2 weeks). It will not be pretty, but the brakes will hide the heavy welds.

Brain

[gotmach]

NO , please do not cut your factory wheels. I had some wheels split and widend and couldnt get the wheels to ballance..and they were out of round. Dont waste your money. there are enough aftermaket co. to get wider wheels. Get the vintagewheels version magnum 500 and save your stock rims for the future....

[The Mach Says]

So let me understand this................you can keep the stock rims, and go up to 275-40-17's? Is this for the back only, or all around? If it's not all the way around, can you leave the fronts on the stock tires, and go to 275-40's in the back only? Or would this cause problems

I'm going to get it lowered with Steeda Sport springs (app. 1.25" drop), so if I do go wider, I want to make sure I never have any clearance issues with the fender wall.

thx,
jc

[falcongtho3]

Got word today from one of my wheel suppliers that there would be a replica of the Mach 1 wheel out in about 45-60 days. They will definitly be available in chrome, but polished, machined or painted may be as well. They will offered in wider widths than our stock wheels, possibly as wide as 10 inches. This will be very good for those of us wanting to add substantially wider tires, and have them mounted on the proper width wheels. I'll try to keep information posted as it becomes available.

[Dragman]

Sori - can ya believe it, I don't have a digital camera?? (spending all my money on the MACH!!) But it looks awesome - very glad I did it - makes the car luk a lot better

[swmtr6c]

I got a wheel catalog right befor I went on vacation one of the companies called OEM carries repo ford wheels they list mach 1 wheels in 16x9 17x9 18x9 will post more after monday 3/10

[MACH & ROLL]

Originally posted by swmtr6c
I got a wheel catalog right befor I went on vacation one of the companies called OEM carries repo ford wheels they list mach 1 wheels in 16x9 17x9 18x9 will post more after monday 3/10

Do you have the catalog info yet? 18x9 repo wheels would be cool!!!

[ITLRUN]

I have the FRPP FR500 wheels (18x9) with Nitto NT 555 Extreme tires 285/35ZR18 on all four corners.

You will need to use steering limiters on the front to keep the tires from scrubbing on the innerfender liners. The limiters are available through Ford for around $5. They are a nylon bushing that snaps over the rack and pinion to limit the turn in.

I supposed you could run larger tires on the rear; but these cars already tend to "push" through turns, a larger rear tire will only increase this problem.

[JTCOBRA]

yes 275/40 17 will fit stock wheels with no issues

drag radials work best at track with 14-16 psi
and burn out like bob glidden( or yuor favorite pro)

guaranteed 1.9s or better

jeffs two cents

:D

[falcongtho3]

Originally posted by MACH & ROLL
Do you have the catalog info yet? 18x9 repo wheels would be cool!!!
Should be available very soon, in chrome or painted finish. Why painted, I don't know?!?!?:CHEERS:

[pdogkilr]

Joe,

I have seen the FR500 wheels at Mustang Services & Performance :THUMBSUP:

I even tooks some pictures to keep the old man's memory fresh. I like them a lot. Considering putting 285s on the rear and 265s on the front. If you can, please post some pictures. I'm sure they look better on a Mach than on a rack.

Also, the shop is asking $350 for the chrome, and I have seen them on the web at $309 with no mention of how much the shipping is. How much did you pay, if you don't mind me asking?

Thanks for any info you can provide.

Jerry

[ITLRUN]

Sorry, I spent all my money on the Mach. I don't have any left over for a digital camera. lol I will try to get some pics posted in the next couple of days.

DPM in MI has the best price of $309 that I have found.

The chrome wheels cost us (Parkway Performance) $300. Dealers that buy them in quanty(48 & 100 wheels) get a better price and can afford to sell them cheaper.

[Ralph Greene]

Originally posted by ITLRUN
I have the FRPP FR500 wheels (18x9) with Nitto NT 555 Extreme tires 285/35ZR18 on all four corners.

You will need to use steering limiters on the front to keep the tires from scrubbing on the innerfender liners. The limiters are available through Ford for around $5. They are a nylon bushing that snaps over the rack and pinion to limit the turn in.

I supposed you could run larger tires on the rear; but these cars already tend to "push" through turns, a larger rear tire will only increase this problem.

Listen to Joe, he know what he's talking about.

If you put a 275X40X17 tire on stock 17X8 wheel, it will fit sorta, and actually work well at the strip or for forward traction, especially at low pressures. But handling is not as good as stock tire/wheel combo.

315 is a section width measurement, not tread. This measurement changes on each tire as the wheel width changes. Our solid axle cars have more room in rear for wide tires than IRS Cobra's.

I also like the 18X9 FR500 wheels, and was thinking of using them with 255X40X18 tires, F & R. At least they are Ford wheels, thus somewhat keeping with the retro theme. Like Joe says adding extra width in rear adds rear bite, making our understeering cars handle even worse. Wide rear for our cars with near stock HP levels is mostly for looks. MHO

[ITLRUN]

^^^Yeah, Yeah, What he said^^^

:THUMBSUP:

I will try to post a few pics asap.

[Ralph Greene]

For Ford Wheels...They seem to be a hi volumn wheel dealer.http://www.gefracing.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=GRPP&Category_Code=WHEELS