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A tube chassis is constructed from a network of tubular steel or aluminum components, which are welded together to form a rigid framework. This design offers several significant advantages over traditional vehicle bodies. One of the most notable benefits is the reduction in weight. The lightweight nature of a tube chassis allows for improved speed and fuel efficiency, enhancing the overall performance of the vehicle. In racing scenarios, every pound counts; thus, manufacturers often turn to tube chassis to shave those critical ounces off their designs.


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Next, the “70” represents the aspect ratio, which is the height of the tire’s sidewall expressed as a percentage of the tire's width. Therefore, a 70 aspect ratio indicates that the height of the sidewall is 70% of 245 mm. This ratio affects the tire's handling characteristics, ride comfort, and overall performance. A higher aspect ratio generally leads to a softer ride, as there is more rubber to absorb shocks from the road.


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