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What is the lower heat range required for them to work?
They work cold, lap 1. They do stop better with some heat, but you won't fly off the track on your warmup lap because they are cold.
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Can I drive them to/from the track?
I have driven them on teh street some. While I think they make lousy street pads (dusty, noisy, lock up street tires in a heartbeat if you arent careful) there's nothing really dangerous about driving them on the street. They don't wear themselves or the rotors any faster doing that. They are really touchy though.
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Compared to Carbotech XP10 and XP12 -
Ha! You think XP10s stop??? PR1 is a modified NASCAR compound. Everyone whose has removed XP10 or 12 and replaced with PR1 has without question prefered PR1
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How hard are they on rotors?
Better than Hawk, not quite as good as Carbotech. Then again, C5 rotors are going to crack long before they "wear out". They all do. The T1 racers just buy the cheapest replacement rotors they can find and pitch them every weekend.
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How do they wear?
On par with Hawk and PFC.
I'm telling you guys, I'm really excited about this material. Nothing like this has ever been on the market for production-based cars. The owner (Tim) worked for Mintex and developed their Nascar formulations that kicked PFC and Hawk in the @ss. He really knows what he's doing with formulations.