thumb|upright=1.2|Thunder Dolphin, a steel roller coaster in Tokyo, at dusk A third classification type is often referred to as a hybrid roller coaster, which use a mixture of wood and steel elements for the track and structure. Many, for example, have a track made out of steel and a support structure made from wood. RMC has notably redesigned wood coasters that have either deteriorated from age or been deemed by parks as too costly to maintain. RMC often replaces the wood track with their patented steel I-Box track design, while reusing much of the ride's wooden structure, resulting in a smoother ride with the incorporation of new design elements, such as inversions, sharper turns, and steeper drops.
thumb|upright=1.2|Thunder Dolphin, a steel roller coaster in Tokyo, at dusk A third classification type is often referred to as a hybrid roller coaster which use a mixture of wood and steel elements for the track and structure. Many, for example, have a track made out of steel and a support structure made from wood. RMC has notably redesigned wood coasters that have either deteriorated from age or been deemed by parks as too costly to maintain RMC often replaces the wood track with their patented steel I-Box track design, while reusing much of the ride's wooden structure, resulting in a smoother ride with the incorporation of new design elements, such as inversions sharper turns, and steeper drops.