rims are 7x15 what tire size

[lfausty]

can i mount 185/65/15 or 205/55/15 67 912 type 4 eng

what would you put on 7 x 15

[Jaems]

Measure the tread width of the tire you want to use. If it is less than 7". You do not want to use it. The tire will also look funny being narrower at the tread than the rim.

The 7x15 will work on the 69 or newer cars. 6x15 are about the biggest rim size for the stock flat side 65-68 cars. The 912's are too balance to run staggard tire sizes. The engine type will not make that much difference. Unless it is as heavy or heavier than a 911 engine. The standard tire for 911's 67 through 76 was 185/70/15 on 6x15 rims. This will also work for the 912. A 185/65/15 will also work fine. This is as big as my 66 will take with out rubbing. Some have gotten the 195/60/15 to work under the 65-68 cars. With the 205/55/15 I think you will be pushing it under a 67 without modifying the fenders. The front, besides modifying the fenders, will also need spacers because of the struts rubbing on the inside of the tires. Also you will probably be unable to go to full lock without the tries rubbing on the inside of the wheel well.

[lfausty]

k a 185 is like 6.5 so skinny for 7 ill pass til i can swap for 6's id need set-2// or 3 cause have one 6 , no kiddin just to complicate things.

heres the deal could just swap one 7 for a 6 run 6front 7back cause another complication was po added flare kit chopped hood and put on 911 bumpers just saying it was done so going with it for now , but nooo not staying this current body look, list is long without fixing this.
restored body,tank,electrical,pedals,floors,window,chrome and seals , all interior and its parts/pieces , primed not painted orig ivory it had been painted black will be green or blue think up to hood/flares bumpers -- great more fab,glass,bondo,welding

type 4 eng build single carb/alternater. dual muff exhaust

brakes/mc are whats going on now ebrake good

throwing some fitment tires on there get it off blocks run through eng/trans just to see whats what . i have 5 195/65/15s (on mercedes92 300e tires) --------
REALLY DONT WANT TO TAKE OFF UNLESS GOING TO WORK AND DONT WANT TO PURCHASE ANYTHING TILL RIMS/BODY ARE COMPLETLY CORRECT, THEN GET SET

LIKE 50 SERIES TIRES/ SMALLER RIMS IN TIME .

SOOOO SHOULD I GIVE 195 A SHOT FOR JUST TEMP TRIAL RUNNING ? AND DO BE CAREFUL WITH ANSWER ILL NEVER HEAR THE END OF IT IF I SCREW HER TIRES UP LOL my concern would be the 65/15 not 60 its a 67 912

[Jaems]

On 912s you want one size all around. Do not stagger the tires. The car is almost perfectly balanced. Putting bigger tires on the rear than the front will screwup the handling. Depending on tires size it could start pushing bad in the corners. With 185/65/15 on 6x15 rims the 912 will forgive a lot of mistakes. Where a 911 of the same year will not. Because of more weight in the rear of a 911, the larger staggered tires does make the difference.

There are a lot of folks that want 7's for racing or just looks. You should almost get two 6's for one 7's, at least three 6's for two 7's. Providing they are both real Fuchs.

Putting 195/65/15 is a little too tall. However, they might work for you car. Each 912 is a little different. They were hand made sort of back in the day. No 195 will work under my car. But some folks get away with it. You just have to see what works with you car. If you are looking for great handling then stick with 60 or 65 in height. 50's might be too low and hard riding, plus you want the tire to fill the wheel well. Not have a big black space around the tires. They may look cool on the low riders and newer Porsches. But not so cool under the older 901/902 body style.

[racer]

Originally Posted by lfausty

can i mount 185/65/15 or 205/55/15 67 912 type 4 eng

what would you put on 7 x 15

A 7" rim, typically holds a 205-225 width tire.

A 7" rim may, or may not, fit in the rear of your car, depending on ride height and alignment settings.

A 185 will be too narrow. You could go with a 195 width but depending on aspect ratio (ie, 45/50/55) it could still be too narrow for the rim. If you look at most tire websites, under the tires "specs" they will give a rim width range for a given tire.

[Mr_SpongeWorthy]

I find both of these tire-size calculators to be extremely helpful when it comes to figuring out what tire size one might want to use. The wheel & tyre bible also has a ton of other useful tire info. Personally, I'm fairly obsessive about using tires with close to the same rolling diameter as stock, so that the speedometer is correct. IMHO tires near the right diameter also look best on a car. Obviously you have to know the stock tire size before you can start calculating. This can be tricky as older tires had an "assumed" aspect ratio. For example, on my 912e I finally found out that the stock tire size would have been the equivalent of a 185/80/14. From there I was able to calculate out a whole series of different sizes which come reasonably close to that original rolling diameter for a set of 15" Cookie Cutter wheels I purchased. You may have to make some concessions regarding size depending on the performance range you want. For example, a 205/65/15 is the closest I can get to matching my original rolling diameter. But, there is a much better selection of performance tires at the 205/60/15 size. Good luck!

Car Bibles : The Wheel and Tyre Bible Page 2 of 2

Tire size calculator

[lfausty]

rims -- its not the money i have three 7 and a 6 what the hell right there


not sure if real there pretty heavy thus a clue that there the cast iron old fakes,correct? but dont have a lighter or heavier to compare. cant remember if i ever found anything except the size, no porche # fox symbol,anything else that would let me know if fuchs or not? if fakes they are those old ones that were the quality fakes, these are in good shape too.

if i try the 195 65 15 fitment hoping the whole rim can bolt for the time being (a drive) i know there both 5 lug dont know if will line up though, just trying not to work with the rims while figuring this fuch-ing situation.

i could care if i have 6 or 7 if there real or not except to help out someone else wanting either or wouldnt be tryin to sell fakes or nothing rim for rim ok by me ,

option drive 3 7's and a 6 whats the problem there ? where would i put the 6 front passenger?

[Jaems]

The part # will be on the inside of the rim. It will either start with a 901 or 911. If they are not Fuchs that will mean that they are cast rims. Where Fuchs are forged. The forge rims will bend where the cast rims will break if they hit a curb or a chuck hole hard.

You do not mix rim sizes like that on any car especially on a 912. Two 6's up front or two 7's. If you want to see how the 7's will fit. Just jack the car up and try them with out the tires. If it is even close without the tire. With the correct tires they will be rubbing.

If you can afford it. Just dump those rims and find some 6x15 Fuchs. You will be better off in the end. Then try a 195/65/15 on the front and the rear to see if it will fit without rubbing. If it does, then go for the 185/65/15. I know they will work.

[lfausty]

getting back to wheel saga again heres a marking found ??? like a horseshoe / horseshoe U / U. not finding the typical markings, or weight (tire on it still) . pretty dirty still and figuring what rims do and dont want for starting to clean them. any helpful info on brand/where made/yr ???

[Butzip]

Ok, I'll keep this real simple. on an swb with no flares......

6x15" fuchs = 195/65/15s
7x15" fuchs = 205/50/15s

these fit.

Three 7" and one 6"...... if you're just wanting to throw them on to roll it around the garage or test drives around the block etc.... it doesn't matter. But clearly, you don't want to mis-match sizes front to rear or side to side. Early cars are to have same size all around not staggered. Otherwise, that's like changing one brake pad..... not really effective if you know what I mean......

I'm running 205/50s on 6x15"s as my track set up..... and used to run 205/55s on 5.5x14"s back in the day....

These are 15's 205/50


and these are 14's 205/55


These are 185/65/15's

[merbesfield]

Butzip and others. Are you referring to 7R wheels or the regular 7x15 Fuchs? Does anyone have a pic of a SWB with no flares sporting regular 7x15 wheels and the 205/50 mentioned above, if they fit?

[lfausty]

butzip i got what im doing with tires settled thanks ,and for more info. They do fit PO front spacers and rear had put a flare kit on it (boo), for now. My question is still in cleaning up rims a bit more the only marking on them pictured above any info appreciated i didnt take a snap of the front just marking. there fuchs ? still is real/faux?

[Jaems]

If you can not find the part number(Which would start with a 901 or 911) and /or the 6Jx15 or 7Jx15 and the fuchs' fox logo. Then they are not Fuchs.

[fbarrett]

My '65 912 with regular 7s and 205/50-15s: no rubbing, no fender-rolling, 1/4-inch spacers at the rear (if I recall correctly), 22 and 27-mm torsion bars, lowered all the way around:



Photo by Dave Bluebaugh.

Because the car is negotiating a right-hand corner here, the right side is higher than when stationary.

Frank

[merbesfield]

Originally Posted by fbarrett

My '65 912 with regular 7s and 205/50-15s: no rubbing, no fender-rolling, 1/4-inch spacers at the rear (if I recall correctly), 22 and 27-mm torsion bars, lowered all the way around:



Photo by Dave Bluebaugh.

Because the car is negotiating a right-hand corner here, the right side is higher than when stationary.

Frank

Frank, could you post any other pics? I have been wondering what the 912 would look like with std. 7's. Did it feel any slower with the 7's vs. 6's? or 5.5's?

[fbarrett]

Originally Posted by merbesfield

Frank, could you post any other pics? I have been wondering what the 912 would look like with std. 7's. Did it feel any slower with the 7's vs. 6's? or 5.5's?

Sorry, don't have time to post other photos, but the car really looks good with the 7s.

Don't know what you mean by slower. The 205/50s lower overall gearing by eight percent, which results in noticeably quicker acceleration--but also higher rpms on freeways. For that reason, and because the 50-series tires also ride more harshly, for long trips I use sixes (with 185/70) or even stock steel wheels (with 195/65 or the original 165/80 tires). These also bring the overall gearing back to stock range.

Frank

[merbesfield]

Frank, do you have to run the 50's to fit the 7's on your car? Will they work with anything taller, which would not give the gearing issues?

[fbarrett]

Because I like the lower gearing, I've never tried a taller tire. And what fits my car may not fit yours. The best way to tell what will fit yours is to buy or borrow an appropriate wheel, fit it with a used tire of the size (and brand) you want, then try it at all four corners.

Frank