Originally Posted by xkjzix

Just an opinion from a guy who has studied just a tad in the area of biomechanics:

Non impact-related foot pain generally comes from tight/overactive muscles in the lower extremity. Gastrocnemius/Soleus pull on the achilles tendon and hence the calcaneus. This elongates/stretches the intrinsic muscles of the foot and the fascia can become inflamed leading to Plantar Fasciitis/ peroneus longus tendinitis and pain in the bottom of your foot.

Pain in your arch is likely NOT from too little arch support, it's from tight calf muscles. Massage and use a foam roller to help loosen them up, and hopefully your foot pain will go away.

Cyclists should not be predisposed to injuries/conditions due to hyperpronation/hypersupination (flat arch and high arch respectively) because that mechanism exists as a "shock absorber" in walking and running.