beta wheel offset

[badboyboogzy]

what is the wheel offset of the beta coupe and what can you get away with as i have some 8mm offset rims and want to know if they will fit bassically what are all the numbers for a beta coupe wheel from size to width ofset everthing anyone who can tell me i would be grateful
bbb

[Gregory Smith]

The stock alloys are stamped 5 1/2 J x 14 H 2 - 3 4.

This translates to 5-1/2" wide by 14" diameter, 34 is the offset in millimeters.

I hope this helps.

[FiatFactory]

For the stock 8 spoke alloys...

Overall a rim is approx 168mm wide. To the insides of the tyre beads (usually how actual rim width is measured) is 140mm (5.5 inches).

From the outer edge to the mounting flange is approx 51mm.

From the inner edge to the mounting flange is approx 118mm.

The centreline is at approx 84mm (1/2 of the 168mm O/A width) ....so the mounting flange is offset outwards (negative offset) by 33/34mm. (84 - 51 or 118 - 84) (give or take a 1/2 mm)

SteveC

[SubGothius]

While the stock wheels' offset is 34mm, as budgetzagato stated, the real offset issue re: your mystery rims depends on how wide they are (presuming of course that they have the requisite 4x98mm bolt pattern!). As rules of thumb, you don't want total total inside width (i.e., half overall width plus the offset) to exceed stockin order to avoid rubbing the tyres on the suspension and whatnot, and you don't want total outside width (i.e., half overall width minus the offset) to exceed available wheelarch coverage. Moreover, you don't want overall tire diameter to exceed stock, also to avoid dangerous rubbing and keep the speedo's inherent dishonesty within reason. ;)

I've already done the math here (http://lancisti.org/forum/viewtopic.php?p=8217#8217); looks like your wheels' 8mm offset would be about right for a... 7.5"-wide wheel? Frankly, I'm not sure if the outside width at that size would even fit within stock arches. If yours are narrower than that, you'd need to bolt some pretty thick spacer(s) under, or in place of, the stock shim (which holds the brake rotor on as well!).

[badboyboogzy]

thanks guys they are standard at the moment i dont think the 7" 8mm offset will fit at all so ill have to find some more so all in agreeince 34mm negitive offset yes
bbb

[SubGothius]

thanks guys they are standard at the moment i dont think the 7" 8mm offset will fit at all so ill have to find some more so all in agreeince 34mm negitive offset yes
bbb34mm offset ONLY for 5.5" wheels, like the stock wheels. For 7" wheels, 8mm is pretty close to maintaining proper inside clearance, might fit okay if you double up on the rotor mounting plates/spacers (using longer bolts to account for the greater thickness of plates!).

[Will]

I got a little less that 32mm positive offset on the FWD Zagato/coupe 14" wheels (by measurement= 31.7mm).

Here are specs for mine, ana bunch collected by Dave Voss:



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Lancia Beta 2L FWD(Zagato)
5-1/2Jx14H2 34
Width overall: 6-11/16" (170mm)
Backspace: 4-19/32" (116.7mm)
Offset: 1-1/4" (31.7mm) Positive

Note: The flange lips are symmetrical. I measured four of these to be nearly identical- apparently they aren't really the 34mm offset they are labelled as, my accuracy should be +/-1mm of absolute -WH


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Cromodora CD99 "Iron cross"
5Jx13H2 47.5
Width overall: 6-3/32" (155mm)
Backspace: 4-7/8" (124mm)
Offset: 1-13/16" (46.5mm) Positive

Note: This would work well as a "space-saver" spare for a Scorpion, it has a large backspace but will still clear the lower spring perch.


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Compomotive 2pc. Modular
7Jx16 Rim, FH500/4 or FH 600/4 Centers
Width overall: 8" (203mm)
Backspace: 4-17/32" (115mm)
Offset: 17/32" (13.5mm) Positive

Note: These are similar in appearance to the 3pc modular "TS" series or the Cromodora Daytona a.k.a. "Ferrari 5 spoke" wheels.This set came from Val Danilov, the wheels are not shown on Compomotive's website. I assume they are an older style model.


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ROH (ZR6?)
7Jx15
Width overall: 7-15/16" (201.5mm)
Backspace: 4-7/8" (124mm)
Offset: 29/32" (23.25mm) Positive

Note: These were installed by my car's PO, Jeff Davison. ROH is an Australian company that sells import and custom wheels that are widely available. This particular model is now discontinued, It matched the styling of the discontinued ZR6, but is a 15" wheel, the smallest size shown for the ZR6 is 16".


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The following information was collected by Dave Voss and can be found on the Mirafiori website, I'm quoting an excerpt here for the purposes of anyone who might wish to save this document as a reference, Dave's original full length wheel article can be found at: http://www.mirafiori.com/dave/s-wheels.html

From the above article:
Wheels used by FIAT:

Designation Size Offset Models Used
---------------------------------------------------------------------
Steel (round holes with hub cap) 4.5 x 13 --mm Early 124, 128
Steel (8 short slots & design) 4.5 x 13 --mm 128, X1/9
Steel (4 pairs of 2 short slots) 5 x 13 --mm Later 128
Steel (4 long slots) 5 x 13 --mm 131
Steel (silver/black paint 4-spoke) 5 x 13 --mm Later 124, Brava
Steel (silver/black center design) 5 x 13 --mm F.I. 124, Brava
Alloy (Cromodora 6-spoke/6-slot) 5 x 13 27mm Early 124
Alloy (Cromodora 4-spoke "Abarth") 5.5 x 13 7mm 124 Spider
Alloy (Cromodora 5-spoke "Daytona") 5.5 x 13 18mm 124, X1/9
Alloy (Cromodora 5-spoke "Daytona") 6 x 13 14mm 124, X1/9
Alloy (Cromodora 5-spoke "Daytona") 6 x 14 22mm 124, X1/9
Alloy (Cromodora "Iron Cross") 5.5 x 13 25mm F.I. 124, Brava
Alloy (Speedline "Iron Cross") 5.5 x 13 25mm F.I. 124, Brava
Alloy (Cromodora "Iron Cross") 5.5 x 14 25mm F.I. 124, Brava
Alloy (Cromodora "Turbo") 5.5 x 14 25mm Turbo 124 Spider
Alloy (Cromodora "Pinin") 6 x 14 25mm Pininfarina 124
Alloy (Cromodora 4-spoke) 5 x 13 --mm Later X1/9
Alloy (Cromodora 4-spoke) 7 x 13 --mm Later X1/9
Alloy (Cromodora large 3-spoke) 5 x 13 27mm Later X1/9
Alloy (Cromodora "Bertone") 5.5 x 13 25mm Bertone X1/9

Wheels used by Lancia/Maserati that fit FIAT:
Designation Size Offset Models Used
---------------------------------------------------------------------
Steel (round holes with hub cap) 5.5 x 14 --mm Beta Sedan
Steel (slots with small hub cap) 5.5 x 14 --mm Beta Sedan
Alloy (F.P.S. webbed 8-spoke) 5.5 x 14 34mm Coupe/HPE/Zagato
Alloy (F.P.S. slotted 2-spoke) 5.5 x 13 25mm Scorpion
Alloy (disc style with slots) 6 x 14 15mm Bi-Turbo
I hope this information will be useful to anyone looking to sustitute wheels from other FIAT/Lancia cars.
If you have anything to add, please email or post!
-Will Holding
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[badboyboogzy]

tthe basic idea is to get bigger fatter wheels on the car with out doing to much we are putting m3 guards on as paart of a kit we are making but afeter that it will still be standard guard if anyone has a set of 15 or 16 delta four stud rims let me know as i will gladly take them i have a set but they are on a delta so i cant take em as the delta woul need new ones and that would mean big money as if ichange the delta itwould have to be a bling bling wheel or the oz racing but they are five stud there is a lot of thema wheels here but they are 14 aswell i just want more rubber on the road and to fill my guards more to set the car off right anyone with rims to sell email me at bettabetabitz@yahoo.com preferably in oz
renay
bbb

[arc]

Hi guys, since you're talking about front wheel drive offset, I have a question. I'm having handling problems with my Fiat 128. Despite realigning the rear wheels and replacing the lower arms and bushes and shockers, it's very nervous around corners, particularly on initial turn in and it has a mind of its own on dirt roads. It's wearing eight slot Cromodoras from a 124, could this be upsetting the behaviour of the car? Or did the standard rims have no offset? Do eight slotters have any offset? I know this isn't a fiat forum, but I'm sure someone has an answer.
Thanks.
Jeremy.