I'm told by my dealer that my OEM front rotors need to be replaced due to a lip that's forming on the outside of the rotor. (If you're looking at the rotor, imagine the top and bottom edge were the pad doesn't touch is forming a lip) The rotors have 25k miles on them with 7 track days total. This is the second set of front pads I'm on and after the first set of pads the rotors were cut (turned).

Is this lip wear normal? I'm going to a 2 day track event in 2 weeks so I don't mind being cautious but I'm not anxious about spending money if I don't need to.

I'm a fairly aggressive driver, just put on Yoko Neova Advans so there's been more spirited driving as well.

My pads def need to be replaced though, both front and rear (.25mm front/ .75mm rear)

Thoughts please...

 

Short and simple answer is 'no'. Unless you are seeing extensive and deep cracks forming, your current rotors are fine. As long as your rotors are within spec (23mm for fronts, 10mm for rears), you will be OK on track. What sort of pads are you running on the track? If you are using something very aggressive, I would be leary of using the rotors close to the minimum thickness. I just had rotors resurfaced and they took off 0.25mm on each side, so 0.50mm total. New rotors are 25mm/12mm IIRC. I had a lip as well and they were able to shave it off

 

Keep in mind that, if you track much, rotors are just consumable parts like pads that are replaced routinely*, so if you plan to do more events, you may as well get an extra set of fronts and take them with you to the track as backups (always have at least one spare front rotor with you). Alternatively (my preference) you can change them and keep the old ones as the spares.

* If you run r-compounds and race pads and drive hard, front rotors last only a few hundred track miles. I used to change them about every 4-5 events due to cracks. Rears last several times longer, almost indefinitely, though I still change them when deep grooves develop.

 

do you use el cheapo rotors ($65 pair) or fancier ones for track?

 

OEM fronts definitely. Usually $60/pair el cheapo rears though I don't know if this is the reason they groove so easily. Since you don't have to change rears often/ever, I'd go back to OEM.

 

Really el cheapos are substantially less than that. I usually use OEM, though.

 

Are you suggesting that spending more for better after market just a higher priced consumable in the long run?

I'm trying to determine if I eve NEED a rotor! But figured if I need to replace, I could go with Power Slot over OEM.

 

I believe most serious trackers have found the OEM's to be the best. The higher priced aftermarkets, esp. drilled or slotted, crack more easily. So they are worse, not better, unless bling is worth more than performance.

 

When you start going through rotors every few track days, suddenly avoiding aftermarket bling rotor prices becomes a hell of a lot more resistable. The only thing keeping me with OEM is concerns about safety and process control. Otherwise I would be going to the no-name market. And I might still do that.

 

what about ones offered by science of speed? i want the two piece ones but you can get used oem rotors for so cheap

http://www.scienceofspeed.com/products/bra...ctional_rotors/