Question: From a coach's perspective, compare and
contrast your favorite mountain bike specific power meters.
Answer: There are currently two power meters on
the market that will work with mountain bikes; SRM and Power Tap. The SRM is a
crank based power meter and the PowerTap is a rear wheel based power meter.
Moving a Power Tap wheel between multiple
bikes is easy providing wheel size is the same. Moving an SRM between bikes is
a much more involved process requiring tools. For racers who train on multiple
mountain bikes, a Power Tap is a more flexible option than an SRM. You can use
a Power Tap on both a geared and single speed mountain bike. My 29-inch Power
Tap wheel floats between my 2 x 10 geared hard tail and my single speed
An SRM has other advantages. It is lighter
weight and so a superior choice for the racer who plans to both race and train
The mountain bike specific SRM reports an
accuracy of ±2% and retails for $3,149. The mountain bike specific Power Tap
reports an accuracy of ±1.5% and retails for $1,499.99.
Both power meters are ANT+Sport compatible
and can synch up with ANT+Sport GPS units and smart phones to provide
additional data from a ride.
Lynda Wallenfels is Cat 1 USA Cycling
coach and owner of LWCoaching.com Visit her site for mountain
bike training plans, coaching and consulting.