From Losi's website:
"The JRXS Type-R is one of the most tunable and customizable chassis you can find. It features a ton of tuning options, including roll center changes, wheelbase, anti-squat, pro-dive, shock angles and more. The JRXS Type-R also features a ton of cool accessories and features too. The JRXS Type-R has been designed with the latest generation of Li-Po batteries in mind, such as the Team Orion Platinum Li-Po. With this in mind, the JRXS Type-R includes two new battery trays, one for sub-c batteries and one for Li-Po packs."