The RPM Front and Rear Bumpers for the Losi Micro-B add some much-needed protection to these fun little machines. Out front, we replaced the stock minimalistic front bumper with our comparatively massive version. Our front bumper is nearly 2-5/8 (66.5mm) wide! It extends forward far enough to shield your ride from most frontal impacts. Additionally, we have extended the front bumper rearward, creating an effective chassis skid plate. While a stock replacement chassis is relatively affordable, replacing it can be a challenging task. RPM bumpers / skid plates help safeguard your Micro-B. Protection that reduces the chance you ever discover the joy of having to replace a chassis. Out back, the stock setup leaves the chassis completely exposed.