Redoi are mostly farmers with just enough wealth to afford a horse.
Not every man who rides into battle in Iberia is blue blooded. Although the glory of the thunderous charge is reserved for those who have the wealth and time to purchase and train a war horse, this has not prevented many a well-to-do farmer from throwing a woollen cloth across the back of his faithful nag and setting off on campaign. Hardened by a life of scratching a living from the ebony soil of Iberia, seated upon a sinuous and dogged steed, these men and their mounts are no strangers to the hardships of life. Preferring to keep what iron they have for ploughshares and scythes, they arm themselves lightly; a few javelins and a light shield are all these men require in order to harass the enemy before the nobles steal the glory of the day. These men rarely find themselves in real danger, their ponies being fast enough to escape all but slingstones and the most determined enemy horseman.
Historically, purchasing a horse large enough to be an effective charger, having sufficient time to train it to charge into enemy lines and being able to afford the panoply to perform such a tactic (lance, body armour, helmet, Celtic saddle, etc.) was no mean feat. It was simply beyond the means of many men. Even after so much money and effort, some troops still preferred to fight as infantry. At the Battle of Ticinus in 218 BC, for example, the Romani cavalry, finding themselves hard pressed by Numidian and Karthadastim cavalry, simply dismounted and fought as infantrymen rather than attempt a cavalry charge. Although many men in Keltiberoi society probably had access to a horse, only a fraction of those who rode did so as heavy cavalrymen. Many instead likely performed a role similar to that of the Redoi: harassing the enemy and retreating from danger. This type of warfare was preferred by the Keltiberoi to set-piece battles. The Kantabroi of the north-west of Iberia became so adept at this form of riding that they would become famous for the formation they employed; the Cantabrian circle. This form of mounted cavalry would continue to be used in Iberia long after it had vanished from elsewhere in Europe. In Medieval Iberia, troops known as Jinetes would continue to fight just as their ancestors had done. Only the arrival of effective pistols in the 16th and 17th centuries AD would cause javelin-armed riders to disappear from the Iberian Peninsula, and that was only because the men who had previously wielded javelins now fired guns and fought as Carabiniers.