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The ability to measure power is slowly becoming more affordable for the average triathlete. Triathlete gear contributor Dillon Hollinger attended the 2015 Interbike Trade Show and found these budget-friendly power meters.
Left-Arm $779-$869, Crankset $959-$1139 (model dependent)
Pioneer single leg
Shimano Ultegra $799, Shimano Dura-Ace $899
Carbon: $629 (FSA BB386EVO) or $699 (SRAM BB30), Alloy: Shimano Dura-Ace $650, Shimano Ultegra $579, Shimano 105 $529, Cannondale SI $579, FSA $529