Brake wear

[ozgti]

Oh ow - wrong ones. Pretty sure those are the DBA T3's and they don't make them to suit the GTI/Octy RS - only the Golf R/Audi S3.

Don't the 5e rs have the same brakes as the r? Where can I get the hats from?

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[brad]

Don't the 5e rs have the same brakes as the r? Where can I get the hats from?

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DBA sell them.

Have you spoken to someone from there or from Brakes Direct or are you just winging it and looking up catalogs?

[Martin]

Plain = DBA 2806E
T2 Slotted = DBA 2806S
T3 Slotted = DBA 42806S

[brad]

Plain = DBA 2806E
T2 Slotted = DBA 2806S
T3 Slotted = DBA 42806S

T3 should also be available in stealth plain face by omitting the S off the part number (also a fraction cheaper). Handy for those of us that aren't a fan of slotted for majority street use.

[Martin]

Indeed - and what ever you do, avoid drilled rotors

[ozgti]

Why should we avoid drilled rotors?

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[pjam73]

Why should we avoid drilled rotors?

https://www.youtube.com/watch?v=78wbht355R8

[Lucas_R]

Why should we avoid drilled rotors?

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They are more likely to crack (hairline cracks around the drilled holes)

[brad]

Why should we avoid drilled rotors?

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The drilling process sets up stresses in the metal which lead to hairline cracks radiating from the drill holes.

if the holes are part of the forging process and stress relieved after maching, they are OK.

[Umai Naa!!]

The holes can also fill with brake dust, causing hotspots which lead to cracking.

[Antiplastix]

Every motorcycle I've had has had drilled rotors. They have done track days, been subjected to greater braking forces than most cars and never had an issue. I'm calling "male cow faeces" on this one.

[Umai Naa!!]

Bike brakes are out there in the open air.

Car brakes are more suceptable to heatsoak, and a general lack of ventilation when you push them beyond their capabilities.

[neil]

Wow you guys must be hard on brakes. I've done 93k and still on first set of pads and rotors and still have plenty left according to my mechanic. But I have a manual and so I change down a lot instead of braking a lot of the time.

They must be all city drivers wasting their lives in traffic , still have original front brakes with 180,000 km , rears replaced at 160,000km.

[brad]

Every motorcycle I've had has had drilled rotors. They have done track days, been subjected to greater braking forces than most cars and never had an issue. I'm calling "male cow faeces" on this one.

Do what you want.

Motorcycle brakes are generally much thinner, solid (rather than vented), floating and a different metallurgy to car rotors. Motorcycle rotors are generally dealing with ~150-300kg of mass, rather than 1000kg-2000kg.

As I said, if the holes are cast/forged in place and stress relieved (like on a Porsche) they are fine. If they are machined (drilled) then not so great although for looks and general bopping about the suburbs they are fine.

Google it.

[Martin]

Every motorcycle I've had has had drilled rotors. They have done track days, been subjected to greater braking forces than most cars and never had an issue. I'm calling "male cow faeces" on this one.

DBA (Oz brake company) even mention the problem in this article:
Rotor Damage | Basic Guide Pt 2 - Disc Brakes Australia

3. Brake Rotor Cracking
When cracking occurs, its practically the end of your disc brake rotors.
While drilled rotors offer loads of performance braking improvements, they are also more prone to cracking.