Tecnomagnesio Wheel Fitment on Pre-A

For Pre A discussions and questions
Post Reply
Message
Author
User avatar
Frank Hood
356 Registry Member
Posts: 120
Joined: Mon Jul 14, 2008 10:08 pm
Location: Bradenton, Florida

Tecnomagnesio Wheel Fitment on Pre-A

#1 Post by Frank Hood »

I have a set of Tecnomagnesio wheels and I would like to know if anyone has them on their Pre-A. I am currently running 15X6 Fuch wheels with disc brakes and I want to go back to drum brakes with 15X5 Tecnomagnesio wheels. Before I swap everything back and find out I have to deflate the tires to install them please let me know if they will fit. The Fuchs fit without any issues due to the rotor/hub being smaller than the original brake drum and I fear I will not be able to get the Tecnos on/off without deflating the tires.

Thanks in advance for your help!
Frank

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#2 Post by Jules Dielen »

Hey frank, depends on what size tire you are installing. The rim itself will fit just fine but you'll have troule installing even a 155 size width tire. (That's about a 5.50 on a 16). 145R15 would most likely clear the rear fenders but it will look silly on a 5" rim.
Jules

Water pumps are for windshield washers only.

User avatar
Frank Hood
356 Registry Member
Posts: 120
Joined: Mon Jul 14, 2008 10:08 pm
Location: Bradenton, Florida

Re: Tecnomagnesio Wheel Fitment on Pre-A

#3 Post by Frank Hood »

Jules

I'm thinking about 185/65/15 tires and have come to realize I may have to carry a portable compressor just in case.

Many thanks
Frank

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#4 Post by Jules Dielen »

Frank,

with 99% certainty those will not clear even when completely deflated. There is simply not enough clearance between the drum and the rear wheel arch.
iI had to deflate thr 5.50x16s to get them to clear on my 52 (with stock 280mm drums), and that is about the width of a 155 radial. Highly doubt you will be able to squeeze a 185 in there. I have 185/70 15 on my 57A and those barely clear.

Happy New year to all!
Jules

Water pumps are for windshield washers only.

User avatar
Randy Kaplin
356 Fan
Posts: 66
Joined: Sat Jun 28, 2008 1:05 pm
Location: Tulsa Oklahoma

Re: Tecnomagnesio Wheel Fitment on Pre-A

#5 Post by Randy Kaplin »

Have 5" alloy wheels (purchased from Wilhiot a few years ago) installed and the tires are Michelin 165 - 15". They are not Tecnomagnesio wheels but sure look similar. Pretty sure the tires need to be deflated to fit on the rear ... very tight clearance. Have to agree with Jules that you are dreaming to think 185 would ever clear the body, the 165 is really tight.
Attachments
P1010220.JPG

User avatar
Bob Slayden
356 Fan
Posts: 136
Joined: Tue Mar 25, 2008 8:42 pm
Location: Sandy Springs, GA
Contact:

Re: Tecnomagnesio Wheel Fitment on Pre-A

#6 Post by Bob Slayden »

Here are original 6" Technomagnesio's we just had installed on my son's '56 sunroof coupe by Franz Blam. (Look him up, Franz Blam Racing, 84 y/o Porsche factory trained back in the day.) It was quite a task, longer studs, spacers and the holes in the wheels had to be drilled to fit the standard diameter studs. No clearance issues except slight rub on full lock, a common issue with P185/65/15R tires.

Happy New Year,
Bob Slayden
Keep 'em on the road
Attachments
Sorry about upside down image, it turns over when you click on it.
Sorry about upside down image, it turns over when you click on it.
They look super
They look super
Rear spacer
Rear spacer
Front Spacers (2)
Front Spacers (2)
Tight but no rub. Can't get your little finger in there.
Tight but no rub. Can't get your little finger in there.

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#7 Post by Jules Dielen »

Pre A's are a different animal, Bob. I ran 5.5x15 with 185/70/15 on my T1 with no problems. The rear axle goemetry on a pre A is different from a T1/ A
Jules

Water pumps are for windshield washers only.

User avatar
Vic Skirmants
Registry Hall of Fame
Posts: 9278
Joined: Tue Oct 27, 2009 5:02 pm
Location: SE Michigan
Contact:

Re: Tecnomagnesio Wheel Fitment on Pre-A

#8 Post by Vic Skirmants »

Jules Dielen wrote:Pre A's are a different animal, Bob. I ran 5.5x15 with 185/70/15 on my T1 with no problems. The rear axle goemetry on a pre A is different from a T1/ A
The geometry is not different. The fender opening is much tighter.

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#9 Post by Jules Dielen »

Doesnt the lower bump stop for the spring plate limit travel a lot more on the pre A?
Jules

Water pumps are for windshield washers only.

User avatar
Vic Skirmants
Registry Hall of Fame
Posts: 9278
Joined: Tue Oct 27, 2009 5:02 pm
Location: SE Michigan
Contact:

Re: Tecnomagnesio Wheel Fitment on Pre-A

#10 Post by Vic Skirmants »

Yes. it limits the travel. That does not change the basic geometry.

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#11 Post by Jules Dielen »

ok that is what i meant. Less travel, not as big an angle when you lift the car, so less room for a tire (in addition to the fender arch)
Jules

Water pumps are for windshield washers only.

User avatar
Vic Skirmants
Registry Hall of Fame
Posts: 9278
Joined: Tue Oct 27, 2009 5:02 pm
Location: SE Michigan
Contact:

Re: Tecnomagnesio Wheel Fitment on Pre-A

#12 Post by Vic Skirmants »

Jules Dielen wrote:ok that is what i meant. Less travel, not as big an angle when you lift the car, so less room for a tire (in addition to the fender arch)
Exactly right.

User avatar
Steve Harrison
356 Fan
Posts: 3301
Joined: Sat Jan 24, 2009 11:39 am
Location: Auburn AL

Re: Tecnomagnesio Wheel Fitment on Pre-A

#13 Post by Steve Harrison »

Just knock a little off that stop where the spring plate hits with a small ziz wheel and it makes things a whole heck-o-a-lot easier as far as tires going on the rear. It doesn’t take much,...just a little bit because the stop is fairly close to the pivot point so by the time the extra travel gets out to the axle point the drop is magnified.

User avatar
Frank Hood
356 Registry Member
Posts: 120
Joined: Mon Jul 14, 2008 10:08 pm
Location: Bradenton, Florida

Re: Tecnomagnesio Wheel Fitment on Pre-A

#14 Post by Frank Hood »

Thank you all for your knowledge and suggestions!

Not sure when I'll be going back to drum brakes but I'll be sure to post the outcome.

Thanks again
Frank

User avatar
Jules Dielen
356 Fan
Posts: 3165
Joined: Fri Mar 28, 2008 3:25 pm
Location: Arizona

Re: Tecnomagnesio Wheel Fitment on Pre-A

#15 Post by Jules Dielen »

just go with the early Pre A 230mm drums. Easy access, but complete lack of stopping power. Can't win them all :(
Jules

Water pumps are for windshield washers only.

Post Reply