AP Pads & Rotors

[O'Neill]

How many sets of rear pads before they cracked.

[shimmy]

That's properly shocking especially seeing as the discs seem fine other than that!

Simon from Questmead sorted it all out in the end, great service and a friendly guy. Brakes felt better than ever at Donington

I have found the rears tend to go before the grooves wear out we're as the front tend to go as the grooves start to disappear.

Front face of both discs look ok, but back face has quite a few big cracks. Heat build up maybe ? Pads were wearing evenly to the metal

[Graham]

That's properly shocking especially seeing as the discs seem fine other than that!

Simon from Questmead sorted it all out in the end, great service and a friendly guy. Brakes felt better than ever at Donington

[Mark CSL]

There is at least another 4 trackdays left in them shimmy :-D

[shimmy]

cracks

had a rear brake grumble at Donny (I knew my pads were on their last legs) and then on the way home i had a knocking which i immediately thought was the discs cracked,

So today I had to get the track rims off and new rear pads so I checked and found cracks in the inside face of both discs, 4 cracks in one side (watch out for the inside face going first)

Luckily had another set of rear AP discs ready so I decided to change them myself. Managed to get the two bolts out and back in and didnt break anything! New set of rear RS29 as well and Competition alloys back on for trip out tomorrow,

[billyboysm3]

Graham, I reckon I'll need new front discs soon. Let me know prices. I'll ping pf a pm for prices.

[Graham]

I can't figure out if you are joking or not :bigcry:

[shimmy]

.

Why wouldn't you paint them?

The brakes won't work half as well

[Graham]

Graham

If you think they are fine, buy new ones and bolts now and use these old ones until they are goosed good and proper. They may last another 2-3 trAckday tbh, they certainly would do another 5000 road miles.

I've certainly use mine a lot longer BUT every time I have swapped them over they have looked x5 worse on close inspection off the car.

With AP you get early crazing of the disc that eventually somewhere on the disc grows to a crack that runs to the edge. On the PF discs the crazing comes much later and when the middle of the disc starts look cracked you know that next the crack will grow to the edge pretty soon.

Questmead do all AP stuff



Ps I wouldn't paint them.

If I bought new discs & pads I would just fit both at the same time mate and keep the discs as spares. I can see that you use your discs until the bitter end :hahaha:

They are PF discs I believe, and Questmead only sell AP's. I am getting a couple more quotes from other places before going with the Questmead stuff though.

Why wouldn't you paint them?

[shimmy]

I will get new discs then. Not worth the risk. I can always keep these as spares shouldi ever need them.

Does Simon do the Bell to rotor bolts & seal & nipple set?

Why do they look like they need new ones out of interest? I'd like to get them painted this winter once the trackdays have calmed down is it worth doing then or are they really bad? I can't see what's wrong with them and nobody has mentioned it before now

Graham

If you think they are fine, buy new ones and bolts now and use these old ones until they are goosed good and proper. They may last another 2-3 trAckday tbh, they certainly would do another 5000 road miles.

I've certainly use mine a lot longer BUT every time I have swapped them over they have looked x5 worse on close inspection off the car.

With AP you get early crazing of the disc that eventually somewhere on the disc grows to a crack that runs to the edge. On the PF discs the crazing comes much later and when the middle of the disc starts look cracked you know that next the crack will grow to the edge pretty soon.

Questmead do all AP stuff



Ps I wouldn't paint them.

[Graham]

I'd say they are at their life's end or very near it.

If you are due another set of new pads, get the discs done now would be my advice as a cracked disc on tracks an be a bit of a risk.

I will get new discs then. Not worth the risk. I can always keep these as spares shouldi ever need them.

Does Simon do the Bell to rotor bolts & seal & nipple set?

Why do they look like they need new ones out of interest? I'd like to get them painted this winter once the trackdays have calmed down is it worth doing then or are they really bad? I can't see what's wrong with them and nobody has mentioned it before now

[northernjim]

Yep, two sets of 12 iirc

those AP's look in need of a new seal and nipple set too tbh



just be careful when tweaking the nips....

[shimmy]

don't forget new bolt set to fit to the bells too:beer:

Yep, two sets of 12 iirc

[northernjim]

try knocking that shit out of your grooves with a screwdriver - then you can see how much depth you have left :wink:


32mm discs can be used till they are wafffer thin ,( ideally replace after 1mm wear!) but then they will crack first.

Yours look fairly well worn IMO


don't forget new bolt set to fit to the bells too:beer:

[shimmy]

I'd say they are at their life's end or very near it.

If you are due another set of new pads, get the discs done now would be my advice as a cracked disc on tracks an be a bit of a risk.