Photo by Fixed Gear Photography

One of the relatively unique products I use in bike fitting is cleat or in the shoe (ITS) wedges. The idea behind wedging is to compensate for a varus or valgus forefoot tilt with a goal of greater comfort and power. The vast majority of cyclists have a significant tilt (approximately 90%) worth compensating. You can learn more by checking out the Bike Fit section of my website:
http://www.cyclingformandfitness.com/Bike_Fitting.php

Personally speaking, I have about a 20 degree varus tilt on each foot making me a prime candidate for wedging. Before wedging (late 2008) my knees went from nearly rubbing on the top tube to traveling inside the foot during each pedaling down stroke. Considering that we pedal down with each leg once per pedal stroke x 80 rpm x 120 min's during the average ride = 19,200 down strokes, it's not hard to understand how side to side movement of the knee over and over often creates knee, ankle, foot, and/or hip discomfort. It's also understandable that pedaling like this causes a loss in pedaling efficiency/effectiveness. The bike fit literature claims an average power increase of 1.8% by adding wedges for cyclist that can benefit from doing so (about 90%). Being skeptical by nature, I wanted to prove this for myself. Therefore, in November of 2008. I performed this experiment:
Wedging & Insole Experiment, Nov 2008
I was pleasantly surprised at the 2.3% power (about 5.6 watts at a Tempo pace) that I gained  by wedging, along with an increase in comfort. Consequently, I was sold on this product and became a dealer shortly thereafter.

Bike fit clients continue to report power increases after wedging along with less aches and pains. And, there's a better chance that clients will enjoy cycling for many years to come by the associated improvement in pedaling form. Pretty awesome!