The flagship Rumble Bee SRT undercuts the TRX by $5,000. Those with a little more to spend can upgrade to the Rumble Bee 392 Track Pack. Last but not least is the daddy of the line-up, the Rumble Bee SRT. The entry-level 1500 Rumble Bee will be the first to hit the market, landing later this year. Those interested in the Rumble Bee 392, 392 Track Pack, and Rumble Bee SRT will have to exercise a little more patience, as they won’t ship until the first half of 2027.