Dumb question... Correct me if I'm wrong but the rears are gonna sell for $650?? Aren't they smaller than the fronts? Dunno why they'd be more expensive.

Should have my set tomorrow. Can't wait to get them on. :excited:

The rear rotors were more expensive when RB debuted them too, I'd imagine they cost more to produce and develop seeing as they have to retain the ebrake.


Sent from my iPhone using Tapatalk

Z1 2 piece rotor set front & rear installed with new pads,SS lines & Moto fluid

There seemed to be some question as to the weight of the rear rotors. My bathroom scale shows a 5 lb reduction from factory to Z1.

Tip on the install. you will probably have to back off the star wheels adjuster on the emergency brake. Check the tension on the brake assembly before re mounting the tires. On the rear I used the old caliper pins as the ones Z1 sent in the kit were too long and looked silly stickin out of the caliper.

She will be getting a wheel alignment tomorrow & then brake break in.

Oh boy, please tell me these are available without the cross drilling!


Sent from my iPhone using Tapatalk

:iagree:

It's R&D costs as well as how much of a BITCH it is to make...

Yep, slotted FTW. Ordered mine already

Nice! I think the rotors are directional I'm not 100% sure but u might want to check it before doing the alignment and brake in...?

They are.

And slam1918 installed them wrong if I'm not mistaken

what's the beef with X drill??? I have an 04 Joe Gibbs Silverado with 175k miles Magnuson blower & Baer slotted X drilled rotors all around. I drove the crap out of it in the S. Florida heat & not a peep out of em. Changed pads @ 75k & didn't have to resurface the rotors.

They are much more prone to cracking than blank or slotted, especially with track use.

Drilled rotors are infinitely more prone to cracking. You probably won't crack them with any amount of aggressive street driving in any temp, but tracking would probably do it.

I get upset that if stress cracks occur the manufacturer is blamed... Which is BS...

I believe them to be backwards as well. Based on their pictures on the site. The cooling vanes need to be angled towards the rear in order to evacuate heat from the rotor. If they were straight vaned I don't think it would matter which direction the slots ran, but they appear to be curved from the pics.

Funny Z1 tech told me on the phone cooling vanes in between the rotor surfaces go toward the front to scoop air and assist in cooling but I will triple check with them. Maybe if Z1 is peeking in on this site they can chime in. The pic is front & rear but thanks for pointing that out. I'll confirm today.

They may have said that however unless their rotor design defies conventional wisdom/practices re: curved vane rotors, I think it was bad information.

Installation:
MOTOR Magazine Article | MOTOR Information Systems
https://www.drt-sport.com/faq
How to properly install plain, slotted, or drilled brake rotors

Good discussion on it here:
Direction of rotation - RacingBrake Forums