Rating A RollcageWhen buying or building a race car, one of the most important things to consider is the rollcage. The 'cage is akin to the foundation of a house-don't buy either one with problems. When assessing a used race car, don't get distracted by long lists of trick goodies and speed parts, that stuff all bolts on and off-a rollcage is forever, good or bad. If you are building a new car, you've got pretty much one shot to get it right. The first thing to consider about a 'cage design is whether it meets the basic rules of the sanctioning body you intend to race it in. If it has all the minimum required tubes, and is made from the correct material (some groups require at least DOM mild steel), next check to make sure it is legal for the intended class. Many classes restrict the points where the rollcage can be attached to the chassis, so make sure you won't have to cut any bars out to meet the rules. It can be costly to adapt a car built for drag or circle track racing to road racing, as there are often big differences in rollcage standards that make crossing over difficult. For example, drag racing rules typically differ greatly in the design of side impact door bars and diagonal supports in the main hoop, as well as allowed material. Finally, try to assess the overall quality of the construction. Are the bends well made, do the tubes fit tightly to the interior, and do the welds look like they were done by a pro or a guy with a tube of bathtub caulk?
Avoiding Common Rollcage Problems