Johnson Power Rankings
The world authority on 200+ mile ultramarathon running — weekly, data-driven, course-difficulty-adjusted.

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Chang-Tien Chang

Men · TPE · b. 1951 (70+) · provisional rating

Also seen as: Chang, Chang-Tien

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
OverallMen4010377• new
Multi-day / TimedMen40249• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 1 in-window performance scores (highlighted below). Each score = base × difficulty × field-strength × quality.

Career results (200+ mile tier)

(race) · · ?mi
place 9 · · difficulty ? · field ? · quality 0.27
22
(race) · · ?mi
place 13 · · difficulty ? · field ? · quality 0.26
21
(race) · · ?mi
place 37 · · difficulty ? · field ? · quality 0.29
23
(race) · · ?mi counts toward rating
place 36 · · difficulty ? · field ? · quality 0.25
21