Sram SRM Professional power meters utilize SRM's proven technology, which uses eight strain gauges to measure power output within +/- 2% accuracy. This enables cyclists to scientifically manage the specifics of their personal program, avoid overtraining, and assess and interpret reactions to a variety of training and racing stimuli.

The Sram SRM Professional measures power, cadence, temperature, heart rate, energy consumption, speed, ride time, ride distance, unlimited intervals, and times in any training zone.

2009 Specialized Tarmac Pro 52cm W SRM POWERMETER
2009 Specialized Tarmac Pro 52cm W SRM POWERMETER
   US $4,300.00
Cervelo R3 with SRM Powermeter
Cervelo R3 with SRM Powermeter
   US $2,000.00
NEW SRM Road Mountain Bike Powermeter Power Speed Cable
NEW SRM Road Mountain Bike Powermeter Power Speed Cable
   US $49.99
SRM Bottom Bracket Mounted Speed Sensor BB Powermeter
SRM Bottom Bracket Mounted Speed Sensor BB Powermeter
   US $64.99
NEW iAero Wireless Gen III PowerMeter iBike Power SRM
NEW iAero Wireless Gen III PowerMeter iBike Power SRM
   US $714.22

SRM FSA K Force SRM 1725 Power Meter Wired
SRM FSA K Force SRM 1725 Power Meter Wired
   US $999.00
SRM Powercontrol PCVI wireless PC6 power meter computer
SRM Powercontrol PCVI wireless PC6 power meter computer
   US $425.00
FSA Carbon SRM Power Meter Crankset PC V 170mm 39 53
FSA Carbon SRM Power Meter Crankset PC V 170mm 39 53
   US $1,500.00
SRM Shimano Dura Ace 7800 WIred Power Meter PC V
SRM Shimano Dura Ace 7800 WIred Power Meter PC V
   US $500.00

Crankset weighs just 750 grams.