930 rotor confusion

[KlaasyT]

Hi, I have a rear rotor on a 87, 930 part # 930 352 046 01. It is my understanding that these are 28mm rotors. I measure 27.5 mm so all is well except the rotor itself reads MIN TH 1,20.5'' http://forums.pelicanparts.com/ultimate/rolleyes.gif I have pics attached. If this means 1.205" then that converts to 30mm. Has anyone run in to this before?

[Bill Verburg]

Originally Posted by KlaasyT

Hi, I have a rear rotor on a 87, 930 part # 930 352 046 01. It is my understanding that these are 28mm rotors. I measure 27.5 mm so all is well except the rotor itself reads MIN TH 1,20.5'' http://forums.pelicanparts.com/ultimate/rolleyes.gif I have pics attached. If this means 1.205" then that converts to 30mm. Has anyone run in to this before?

That is the right, rear, rotor for a 930, MY'78-89


new it is 28mm, the wear limit is 26mm, the symmetrical machining limit is 26.6
mm

[KlaasyT]

Thanks Bill for the quick reply. I feel better now. Why the confusing numbers in what seems to be inches? The last thing I expected.

Thanks

Clarence

[Bill Verburg]

Originally Posted by KlaasyT

Thanks Bill for the quick reply. I feel better now. Why the confusing numbers in what seems to be inches? The last thing I expected.

Thanks

Clarence

it looks like the manufacturer got confused and put the front min spec on the rear rotor, the late('81-89) front rotors look similar to the rears but are 32mm thick w/ a min. symmetric machined thickness of 30.6mm, 30mm wear limit

[javadog]

Makes you wonder if that is a part made by an OEM supplier, or a knock-off part made by who-knows-who... It's hard to belive that a company like ATE, Brembo, etc. would make such a mistake.

JR

[Nine9six]

Originally Posted by javadog

Makes you wonder if that is a part made by an OEM supplier, or a knock-off part made by who-knows-who... It's hard to belive that a company like ATE, Brembo, etc. would make such a mistake.
JR

Yep...Unless they are sourcing parts from China in order to:
a) keep a competitive price point, in order to stay in business.
or
b) improve their bottom line, in order to stay in business.
or
c) improve their bottom line, in order to improve their bottom line.
In any case, the consumer gets the $hort or $hitty end of the stick.

[KlaasyT]

Thanks, it doesn't show in my pics but the numbers are preceded by what seems to be a Porsche symbol, an inverted triangular shape with a "p" inside which I have seen before.

Clarence

[motogman]

Makes you wonder if that is a part made by an OEM supplier, or a knock-off part made by who-knows-who... It's hard to belive that a company like ATE, Brembo, etc. would make such a mistake.

JR

LOL


While I agree the risk grows as the manufacturer becomes more obscure it is far from the case that well known OEM suppliers are 'perfect' in their execution.