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March 28, 2018

Profile Racing’s Legacy: Week 12, 1980.

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By 1980, after going through three prototypes, Profile Racing was in a full swing production of their classic 19mm box crank.

On the sidelines, Jim Alley began to prototype what would become the Legendary, Profile Racing Champ Pro frame.

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What Jim brought to the table, deviating from the typical bmx frame designs at the time, were:

  1. A shift from a 1″ to an 1-3/8’s” down tube. This junction, between down tube and bottom bracket, complimented the Profile Box Cranks, and made a much more rigid drive train.
  2. A minimization of the standard bottom bracket width from 2-5/8″ to 2-1/2″. This also contributed to less flex put upon the cranks.
  3. The Champ Pro offered a much shorter tail section, cutting the standard length by 3/4’s of an inch. Through testing, this proved for better gate starts.

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March 28, 2018