Important Note on Bike Frames: Your bike must have a strong steel or cromoly front fork to use with the Phoenix system.Every time someone puts a Phoenix motor on an aluminum front fork, the motor tears the dropouts from the fork. The result is that the wheel takes off without the bike, and you're left behind. Please do not put a Phoenix motor on aluminum front forks.
However, most manufacturers claim aluminum frames, but in fact the forks are steel.
Take a magnet off your refrigerator. If it "sticks" to the fork, it's steel. Magnets are not attracted to aluminum. Many have used rear Phoenix motors on aluminum. We have not been told of any failures. Cromoly is said to be stronger than steel, so it should work fine, and we have had no reports of failures with Cromoly.
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