OZ vs DYMAG vs TECHNOMAGNESIO WHEELS

[rg2]

Guys, I'm in the process of a ground up rebuild of a 1995 VD FC and I have an abundance of wheels (like 7 sets) that came with this car. The Wheels are made by DYMAG, OZ and TECNOMAGNESIO. So, the purpose of my post is to soliciting information and opinions about what wheel is the best of the three makes. I honestly don't know what wheel manufacture came on a 1995 VD from the factory. You opinions and knowledge is welcomed.

[Rick Kirchner]

they came with OZ look for my sticky on backspace for various applications. You should check that all the fronts are the same and all the rears are the same.

[rg2]

Any opinions as to which of the three are the better wheels?

[marshall9]

Techno's are light and good.
As stated above, there were offset choices, so measure.

[BruceRace]

Pics, and offset measurements?.....

[rg2]

It's my understanding from Mr. Kirchner's post that the 95 VD FC came from the factory with a front wheel offset of 3.50 and the rear wheel offset of 3.750. That said, all the Tecnos wheels I have are 3.750 offset front and rear. The Dymags have 3.750 offsets for the rear wheels and 3.250 for the front wheels and the all the OZ fronts are 3.50 but offset for the OZ rears are different in that one set is 3.750 and the other rear set with mounted rain tires are a whopping 5.00 offset. I'm assuming the previous owner was experimenting with track widths??? Opinions?

[Rick Kirchner]

more likely the previous owner has a collection of wheels from different years or even chassis. I might be wrong, but I believe the 90-95 cars used one configuration, the 97-99 cars another, and the really wide-track later cars a third. someone please correct me if I'm wrong.

I think Dymags were more common on Reynards, Technos as well.

[rg2]

So does anybody else out there have an opinion as to what wheel make is better than another and why you believe so?

[Lotus7]

Assuming you want performance over "period correctness", then the lightest wheels likely have the lowest polar moment of inertia, and would therefore be a good choice...

that said, you have a selection of backspacing apparently, and there might be chassis dynamics advantages to varying the front and rear track to suit racetrack and/or conditions....

(its why we go testing )

[problemchild]

So does anybody else out there have an opinion as to what wheel make is better than another and why you believe so?

All of those were quality wheels with little difference in quality. The Technos are probably minutely lighter. Those Dymags could be 40+ years old, and the Technos 30+. My guess is that if you start measuring offsets, spinning for straightness, and inspecting for condition ...... it will be apparent quite quickly which are the best wheels and how many are matched sets. Finding 3 good matched sets from a pile of mixed oddball old wheels would be an accomplishment IMO.With $100 being the going rate for remounting a set of tires, I do not believe you can have too many wheels and I never understand why anybody sells extra wheels to a car they still own..

[Charles Warner]

In years past there were only a few firms that made the basic shaped plugs from which all wheels were machined. Dymag and Techno used the same firm in Italy with the same quality control. The machining process might make some difference, but not enough to worry about.

Greg is right about the inspection. And, if they are over 10 years old I'd have them crack checked.

[BeerBudgetRacing]

My 94-95 came with 1 set of Technos and 2 sets of Jongbloeds (not mentioned in this thread) along with some Jongbloed parts.

I don't have my notes handy but I have found I'm most consistent on the Technos - but they are different offsets compared to the Jongbloeds.

That said, I do like the Jongbloeds. There is an article in one of the Carroll Smith books about the advantages of 3 part wheels. Granted, the article and books are older and newer 1 part wheels are better than they used to be, but if you are on a budget, they cost no more to buy and are more easily repaired.

Example: One of my sets came with rains mounted and being in SoCal I just stored them. I was heading to NorCal, rain forcasted, so I dug them out. I found the rears to be 2 different offsets and one of the centers was bent. With the parts I had I was able to build a new pair of rears with matching offsets. If the pair was Technos or OZ I would have had to trash them and buy a new pair. Jongbloed still sells the parts and that would have run me about $350 iir. Cheaper than 1 OZ wheel.

That said, if I was investing in a new set of wheels I'd buy something current rather than Technos or Dymags.
OZs or Jongbloeds. Jongbloed still makes 1 piece (300s) and 3 piece (330s) wheels for these cars.

Sidenote: I think all the numbers quoted in this thread are BACKSPACE not OFFSET.
Backspace is the measurement from the inside edge of the wheel to the mounting surface.
Offset is the measurement from the CENTER of the wheel to the mounting surface (can be positive of negative).

3.75" is a backspace. On an 8 inch wheel that makes it -0.25in offset.
On a 6 inch wheel. that would be a 0.75+ offset.

[rg2]

My 94-95 came with 1 set of Technos and 2 sets of Jongbloeds (not mentioned in this thread) along with some Jongbloed parts.

I don't have my notes handy but I have found I'm most consistent on the Technos - but they are different offsets compared to the Jongbloeds.

That said, I do like the Jongbloeds. There is an article in one of the Carroll Smith books about the advantages of 3 part wheels. Granted, the article and books are older and newer 1 part wheels are better than they used to be, but if you are on a budget, they cost no more to buy and are more easily repaired.

Example: One of my sets came with rains mounted and being in SoCal I just stored them. I was heading to NorCal, rain forcasted, so I dug them out. I found the rears to be 2 different offsets and one of the centers was bent. With the parts I had I was able to build a new pair of rears with matching offsets. If the pair was Technos or OZ I would have had to trash them and buy a new pair. Jongbloed still sells the parts and that would have run me about $350 iir. Cheaper than 1 OZ wheel.

That said, if I was investing in a new set of wheels I'd buy something current rather than Technos or Dymags.
OZs or Jongbloeds. Jongbloed still makes 1 piece (300s) and 3 piece (330s) wheels for these cars.

Sidenote: I think all the numbers quoted in this thread are BACKSPACE not OFFSET.
Backspace is the measurement from the inside edge of the wheel to the mounting surface.
Offset is the measurement from the CENTER of the wheel to the mounting surface (can be positive of negative).

3.75" is a backspace. On an 8 inch wheel that makes it -0.25in offset.
On a 6 inch wheel. that would be a 0.75+ offset.

Agreed, backspace is the better term!

[Buc01]

Guys, I'm in the process of a ground up rebuild of a 1995 VD FC and I have an abundance of wheels (like 7 sets) that came with this car. The Wheels are made by DYMAG, OZ and TECNOMAGNESIO. So, the purpose of my post is to soliciting information and opinions about what wheel is the best of the three makes. I honestly don't know what wheel manufacture came on a 1995 VD from the factory. You opinions and knowledge is welcomed.

I have 2 sets of original Technos that came with my 1991 VD FC and 1 set of Dymags.
Never checked the backspacing on any of them. 1 set Technos are rain only.
I switch back and forth between 1 set of Technos and 1 set of Dymag very frequently.
Never noticed any difference at all between the 2 in lap time or feel.

Aaron