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Discussion Starter #1
Hey guys, first time posting to the forum here.
Relatively new Saab owner as I recently purchase a 2001 9-5 linear 4cyl in April.
Bought in Colorado where I was living at the time and then driven to FL where I am currently residing. Just passed 54k miles.

Last week put new Kumho Ecsta ASX tires on all 4 wheels and looking to put new pads and rotors on soon.
The question I had is that my owner's manual says that my front rotors are 288mm. Eeuroparts only offers 285mm for the front and when I spoke to one of their representatives they said that is the correct size. Some other internet sites do offer the 288mm though. So needless to say I'm a little confused and definitely want to make sure I order the right size. Any thoughts would be great.

Also, planning on going with Zimmermans. Do you guys think cross-drilled rotors make that much of a difference? I know there's been a ton of debate about this as well.

Thanks for any help. I've already gotten a lot out of this forum as I just came across it a few days ago. :cheesy:
 

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They are 288mm and the aero (and diesel) are 308mm ;)
 

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3mm woudl be unnoticable... I would guess that all the sites just quote the numbers from the "book" regardless of what the afctual size is..I am sure th eeuroparts fit they know what they are selling
 

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Upgrade to 308mm... cough cough... :p
 

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Discussion Starter #5
yea, i would love to put new bigger wheels on there, but right now i'm gonna be too busy spending money on the lates PCV, pads/rotors, idler pulley, head bolts, and a variety of other preventative maintenance.

the car seems to be in great condition. had a local saab specialist look at it before i purchased in colorado, and the indy here in florida has said the same. relatively low mileage on it. love it so far. fun to drive.

thanks for the input guys, i'm sure i'll be asking plenty more questions;)
 

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speaking of rotors, I'm getting some pretty good shaking in the steering wheel when breaking at high speed. I get a good amount while even at slower speeds. I've read that is probably due to my rotors possibly being warped, but they're barely over a year old. Are the rotors the most likely cause, and if so, which rotors should I be replacing them with?
 

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crosseye said:
speaking of rotors, I'm getting some pretty good shaking in the steering wheel when breaking at high speed. I get a good amount while even at slower speeds. I've read that is probably due to my rotors possibly being warped, but they're barely over a year old. Are the rotors the most likely cause, and if so, which rotors should I be replacing them with?
'Fraid it's a possibility, I had that happen on my '97 Tahoe. Usually occurs after high speed braking and then quick cooling, or constant braking on a hill.
 

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crosseye said:
Are the rotors the most likely cause, and if so, which rotors should I be replacing them with?
Are they worn low enough to warrant replacing them?

Discs can be skimmed and as they are skimmed whilst still attached to the hubs they will be truer than when they were first installed.

ASk your local mechanic about disc skimming.

a website I stumbled upon said:
Brake discs over time have a very hard time, they are treated to extreme temperatures and conditions. Over a period of time discs become worn and can develop hotspots and runout which you the driver can feel as a vibration and or wheel wobble, this is mostly common on cars with a fixed caliper like the Racing Puma, Focus RS etc., it can also be found on normal road calipers if the brakes have overheated, had exessive use or have been used on Event/Track days.

Simply replacing the discs with new ones will not necessarily completely stop the vibration as disc runout can still occur due to the drive flange having runnout, if a drive flange gets a runout of 0.002" the disc will have a runout of 0.004"+. Although 0.004" is only the thickness of a hair on your head, pedal and steering wheel movement will be felt inside the car.

We can now skim discs on the vehicle so the disc will be perfectly matched to the drive flange this will eliminate any vibration issues. and save the cost of replacement.
 

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Gazolzwurf said:
ASk your local mechanic about disc skimming.
My "local" mechanic would say:

"The pattern discs are £30 so why bother :confused: "

(I dont shop locally if I can help it :cheesy: )

Well done on the 1000 fella - it's all down hill now :p
 
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