Ring of The Horse (3.5e Equipment)
From D&D Wiki
Ring of The Horse: This ring is decorated with workings of galloping horses. Its wearer adds 10 ft to his natural land speed. If he has the Run feat, he adds 20 ft to his natural land speed instead. Also, he is able to charge at four times his speed before the ring’s enhancement.
Moderate transmutation;CL 7; Forge Ring, polymorph, creator must have the Run feat; Market Price: 26,950gp