disc life

[billybac]

Just had my rear disc and pads replaced by my dealer, after on 15,000 miles. Seems a bit soon. I dont use it a lot particularly. Front discs also have only .4 mm left on them. Anyone else had to change this quickly? I know other bikes I have had they have lasted much longer - although they were not as heavy as the GS...

 

[Reggie P]

I dont use it a lot particularly. .

They are linked ...so using the front brake will apply the rear.
Second point ( hope this helps ?) is that the wheel spin prevention also applies the rear brake.

It seems that manufacturers these days are a tad "restrictive " on disc thicknesses ( tolerances) ... every time my car goes to the dealer I have the same battle where they try and tell me all discs need replacing.

 

[billybac]

Ah... yes am a little over eager on that...


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[Myke Rocks]

Big Windows!

 

[billybac]

Big Windows!

you have lost me...

 

[Myke Rocks]

you have lost me...

Showroom has big windows: They saw you coming!

 

[billybac]

Showroom has big windows: They saw you coming!

Ah right, yes, you are most probably right!

 

[ChazzyB]

Just had my rear disc and pads replaced by my dealer, after on 15,000 miles. Seems a bit soon. I dont use it a lot particularly. Front discs also have only .4 mm left on them. Anyone else had to change this quickly? I know other bikes I have had they have lasted much longer - although they were not as heavy as the GS...

Front disks: IMHO this is FUD* scare tactic. Measure an unworn bit of a disk and you should find they're 5mm, with a wear limit of 4mm. So 'only' 0.4mm left means it's half-worn - another 15K miles.


*Fear, uncertainty, doubt.

 

[crotchrocket]

How many rear sets of pads have you gone through? My GSA is at 12800 miles and I'm on the 3rd set. Just wondered of the ratio of pads to discs is similar.

To my knowledge the traction control system doesn't apply the rear brake, just cuts power to the rear wheel.

 

[malcopopolo]

Would it fail the MOT if the discs dropped below 4mm? And would it really affect rear brake performance?

 

[billybac]

No sets! Bought the bike with 6k and 3 years old, replaced 6 months later after putting 9000 miles on it...!

In reply to Crotchrocket


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[billybac]

Front disks: IMHO this is FUD* scare tactic. Measure an unworn bit of a disk and you should find they're 5mm, with a wear limit of 4mm. So 'only' 0.4mm left means it's half-worn - another 15K miles.


*Fear, uncertainty, doubt.

Good to know. Thank you


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[Reggie P]

To my knowledge the traction control system doesn't apply the rear brake, just cuts power to the rear wheel.

You are absolutely correct - apologies. ( I was foolishly thinking of the "cheap" way car vendors try and re-create a limited slip diff , by having the ASC apply a brake to the spinning wheel , to effectively divert more torque to the non-spinning wheel)

 

[telbenj]

How many rear sets of pads have you gone through? My GSA is at 12800 miles and I'm on the 3rd set. Just wondered of the ratio of pads to discs is similar.

To my knowledge the traction control system doesn't apply the rear brake, just cuts power to the rear wheel.

I've done 18,000 and still on the originals front and rear. And I don't hang about either.

Terry

 

[JimmyMac]

Here is a link to my story from last summer, talk about trying to put the shits up you........


http://s1000rrforum.co.uk/showthread.php?6077-HP4-Carbon-Front-Discs&highlight=brembo+disc

I'm in total agreement with ChazzyB

JimmyMac

 

[rattler]

Dealers always rip you off

 

[wildoat]

I'm guessing the environment in which the bike is ridden could speed up disc and pad wear, i.e off road in muddy/ gravelly and dusty condition. I'm currently riding a BMW R1200R lc, I've just completed 18000 miles
the front discs are measuring 4.85mm/4.84 and the rear 4.95, I've had one new set of rear and one new set of front pads, I reckon the wear is minimal and I'm quite pleased.
I don't ride much in town/city conditions so am able to use the engine breaking to reduce speed much of the time.
cheers

 

[GS-Jonesy]

Would it fail the MOT if the discs dropped below 4mm? And would it really affect rear brake performance?

I don't believe so. During the MOT the effectiveness of your breaks are tested but I don't believe any physical measurement is undertaken. Bikes with linked brakes are tested in a slightly different fashion to those with unlinked in that each wheel is test independently (as per a "normal" brake system) and then a formula using the score of the front and back wheel is used to determine the overall brake effectiveness score.

Re would a disc thickness of under 4mm effect braking performance? I'm not sure but would guess eventually yes. Performance has to be proportional to thickness of disc to some extent...but at what thickness performance would drop off to a level that would be noticeable? No idea


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