Fikse offset numbers ???
 

Hey guys,

Does anybody know how or where to find the offset reference on a Fikse wheel ?
The numbers on the wheels are : F116A11 2199 6744
F116A11 1399 6338
I'm guessing the first digits in the second series of numbers would indicate the offset,can anybody confirm this please ???

Thank you !
Phil

Email Fiske they will tell you what the numbers mean.

Those are Fikse's serial numbers. They will tell you the offsets if you ask.

Don't know if you guys know, but FIKSE has shut down.

Really ?

Fikse closed shop, left some people in the lurch...

This is the reason why i am asking on this Forum...
There is no reply at Fikse and i was hoping somebody more familiar with Fikse
wheels would be able to shine some light on those numbers.

I have my eye on a used set that i want to install on my 89 Coupe and the seller is unsure about the offset. It is a costly mistake if they do not fit properly... lol

Phil

Here is how you measure wheels
http://members.rennlist.com/1976c38/...AQ-diagram.gif

I don't think those manufacturing numbers will relate to the size or offsets. I just looked at the serial numbers for my Fikse wheels and there's no relation whatsoever. Sorry. I think you're going to have to measure them.

Best thing you can do is find out what the seller had them on. If they were run on any 911 SC or Carrera from 78 to 89, they should fit your car too. The common Fikse offsets for our cars in 17" was et30 or 32 front and et 15 or 19 rear. But it depends on whether the fronts are 17x7.5 or 8.

trying to find what size and offset will fit my car. I have a 1975 with SC flares out back. 17's will fit right? what width and offset are optimal?

Paul,

I 'm using Fikse FM10's this year due to a brake upgrade,they are 7.5 and 9.0 inches wide and i will go in the garage tomorrow morning,after the F1 race... and measure the backspacing for you.
I'm using 1/2 inch spacers in the front but that is most likely due to the modified hubs i had to install for my 996TT brakes.

My car is a narrow bodied 89 Carrera Coupe.I have 225/45/17 and 255/40 /17 Dunlop DZ1tires on presently and i could have easily went with 235's and 265's ...


Cheers !
phil

you have no issues with rubbing? I have 205/55 and 225/50 on 16 inch fuchs. I had to roll the fenders to keep them from rubbing

Paul,

My previous setup was with 8 inch 951 offset Fuchs with 225/50 16's in the front and 9 inch Fuchs with 245/45/16 inch Toyo T1R's in the rear.
No issues whatsoever with the rear but i did slightly roll the front fender lips with a baseball bat before i got the 951 offset Fuchs as i had some rubbing with the stock 7 inch wheels ...
With my Fikses i'm using 1/2 spacers in the front and i have no rubbing issues,i could run without spacers but the inside of the spokes on my wheels are a little too close to the calipers,
I have 1/4 and 3/8 spacers spacers that i will play with after i do a final lowering and corner balance ...

Will get you the info tomorrow !

Cheers !
Phil

Not quite. Fikse was purchased by Kodiak several months ago. Fikse is and will continue as a separate line, and they just hired a new sales director for Fikse, a guy previously with Kinesis.




Tim

Paul,

Here you go,i got some numbers for you ...

1- Rear 9 inch 17" Fikse, backspacing 6 inches
2- Rear 9 inch 16" Fuchs, backspacing 5 1/2 inches , ET15

3- Front 7.5 inch 17" Fikse, backspacing 6 inches
4- Front 8 inch,951 offset 16" Fuchs, backspacing 5 1/4 inches , ET23

So it seems like my Fikses have the same ET,there is a formula for converting backspacing to ET somewhere in these forums,but at least this gives you a better idea !

Cheers !
Phil

http://forums.pelicanparts.com/uploa...1273421362.jpg
http://forums.pelicanparts.com/uploa...1273421378.jpg
http://forums.pelicanparts.com/uploa...1273421392.jpg
http://forums.pelicanparts.com/uploa...1273421467.jpg

thanks a million,
so the fikse wheels locate the tire a bit more inboard than the fuchs if I am reading that right. so it allows wider tires for the same wheel well. are there any issues of rubbing against the inner fender well or rear oil lines?

Paul,

Always happy to help :)
No rubbing issues whatsoever,front or rear and like i mentioned earlier i could have went with 235/45/17 and 265/40/17 tires.Dunlop makes those matching sizes in their Direzza DZ1 Star Spec tire,which i think highly of so far !

As far as the wheels being located more inboard,that's a bonus as it's easier to space them out than having to bring them in ... lol

Cheers !
Phil

when I went to lime rock for my first DE day, my instructor was running fikse wheels and the dunlops as well. his car was similar to mine with maybe stiffer dampers the only difference besides the wheels and tyres. he took me for a ride and you could really feel the difference in the way he could lean on the tires. of course I have much harder tires in comparison and I need to learn a lot more about driving, but it was such a huge difference in feel

The Fikse's I've seen on a 911 w/ SC/Carrera flares are
8x17 ET31.3
9x17 ET18.6
these fit well
in front you can use 8 ET25-31 fairly comfortably w/ 225 -245 tires, the 235 & 245 tires will need a lot of work to clear the fender lips at lower ride heights. ET25 sticks more out board than ET31

in back the 9s are a comfortable fir w/ 255 -275 tires. As w/ the front the wider tires get harder to fit the lower the car. and you will sometimes need to mod lips & trailing arm bolts and move oil lines

I used 8 235/45 x17 on 8 ET25 and 275/40 x17 on 9.5 ET19

just my opinon but 8 ET30 w/ 235/35x18 & 9 ET18 w/ 265/35 x18 would be a great combo and easier to deal w/ than the setup I had because the tires are shorter

Bill,

One question regarding the ET on my 7.5 and 9 inch Fikses.
Since the inner barrel on both wheels is the same with a backspacing of 6 inches would that mean that they are both ET 18.6 ? My front wheels are spaced out 1/2 inch in order to clear my calipers and Steve Timmins modified hubs...
The only difference is the outer lips which are 1.5 for the fronts and 3.0 inches for the rear !

Regards !
Phil

yes, the Fikse 7.5 that I have seen are ET18.6

Back space (mm) Front space (mm) Edge to edge (mm) is


132.84 83.06 215.90

The Fikses(if they are classics like FM10, FM etc and not the Profil series) 7.5's are generally et37. The 8.0 would be ET30 and the 9.0 would be et18.

All of the 17 inch Fikse classics use the same hub pad height and they just maniplulate the rim shell stack. If anyone needs the rim shell stacks that go with the different widths/offsets let me know.

If you go with the Profil series you have the choice of multiple hub pad heights and can fine tune the offset much better.

Cheers

there are/were 2 different 7.5x17 Fikse


width(in.) Factory +o/s(mm) Calc +o/s (mm) Back space(mm) Front space(mm) Edge to edge(mm) Edge to edge(in)

<pre>
7.5 18.6 18.6 132.84 83.06 215.90 8.5
7.5 31.3 39.69 147.64 68.26 215.90 8.5
8.0 18.6 18.6 120.20 83.00 228.60 9.0
8.0 31.3 31.8 146.05 82.55 228.60 9.0

9.0 18.6 18.5 145.54 108.55 254.00 10.0

</pre>

how close the calc ET is to the factory ET gives you an indication of the accuracy of the supplied #s

Jeff is correct, backspace of 6" is probably the second wheel, ET31.3

not to sound stupid, but how do you interpret those numbers to choose the right wheel?

You now have
7ET23.3 & 8ET10.6 you don't say what tires but probably 205/55 & 225/50

in front the biggest that you can use are
8ET25-31
and in back
9ET15
or
9.5ET19

for tires in 17
235/45 or 235/40 or 245/40 in front
255/40 or 265/40 or 275/40 in back

for tires in 18
235/40 or 235/35 or 245/35 in front
265/35 or 275/35 in back

the bigger the tire the more work to fit it.

tire height is also a concern, 911s originally cam w / 185/70x15 @~25.7, The shorter the tires the easier to fit, certainly keep it under 25.7"
185/70 x15 25.7
205/50x15 23.1
205/60x15 24.7
205/55x15 23.9
215/60x15 25.2
225/50x15 24.0
205/55x16 25.0
225/50x16 24.7
225/45x16 23.7
245/45x16 24.6
225/45x17 25.0
235/40x17 24.4
235/45x17 25.4
245/40x17 24.7
255/40x17 25.0
275/40x17 25.7
225/40x18 25.1
255/35x18 25.0
265/35x18 25.3
275/35x18 25.6
285/30x18 24.8
275/40x17 25.7
245/45x16 24.6

you also need to be concerned w/ f/r height and width relationships

for performance shorter sidewalls are preferred, ie 30 series is better than 35 is better than 40 etc.

JMO, but for a typical 911
8x17 w/ 235/40 & 9x17 w/ 265/40 is a great compromise and not too difficult to fit

or 8x18 w/235/35 & 9x18 w/ 265/35

back in the day 235/40 on 8x17 & 265/35 on 9.5x17 was a great setup but the 265/35 x17 tires disappeared and I had to go to 235/45 & 275/40 which was ok but I was never as happy w/ as the previous set. Currently use 225/45 & 255/40 because that car isn't tracked anymore

You are right Bill, the 7.5 could be configured both ways, not listed as a current build but could be done again.

Bill has good tire advice too. We typically go with a 225/45/17 front on an 8.0 and a 255/40/17 rear to keep the heights in check and there is good availablilty in both street and R-compound.

In 18 we run a 225/40/18 on an 8.0 and a 255/35/18 on a 9.0 or 9.5. The problem is this limits you to a hoosier as no one else makes a 255/35/18, yet..... There may be others but we have only specced this out with the Hoosier R6 and not spent much time searching for another tire....

Cheers