Two piece floating rotors for Atom 3 with stock wilwood calipers

[2/3rdsCobra]

^ Nothing to fear. Use new hardware (they use locking nuts,so no juice necessary) and torque them properly and they will never ever come loose. Never.

^This

FYI, I was running a highly modified (turbo, quaife gear set, built motor) Miata with a 2 piece rotor set-up. They were lighter but there was another benefit; the aluminum hat shed the friction heat from braking MUCH BETTER than a one piece cast rotor. This reduced the liquefying of the wheel bearing grease increasing the longevity (Miata's go through bearings/hubs about one set a race season) of the hub/bearings. I was able to get 2 and a half seasons out of hubs after going with 2 piece rotors.

Next, if you are needing new friction rings for your 2 piece rotors, go to Brakes You can send them your hat and old friction rings if you don't know how to measure or don't feel comfortable giving them the dimensions you need for a replacement set. They have all sorts of options for metallurgy, fin design and floating options at very reasonable prices.

Lastly, GET NEW HARDWARE and a reliable 1/4 drive torque wrench (there's not a lot of torque applied to these fasteners especially if you opt for floating rings). Most of the fasteners on the market are proprietary so if Coleman doesn't have them, you may need to get ahold of the hat manufacturer. The new hardware is usually a torque-lock type most with an abutment feature (much like stage 8 fasteners) that locks against the hub hat to prevent loosening.

[NKC]

Bringing an old thread back.

Is it weird that my AA3 with alcons came with 1pc cast rotors that weigh 12lbs each? Seems really heavy considering that my rear wheel and tires (15x10 275/35 A7) only weighs 34lbs.

Anyone have a good source for 2pc rotors that fit the AA3 bolt pattern? Any idea how much it weighs? Thanks.