As the restaurant is often packed, Redbones introduced two on-the-go alternatives last summer, stripping down its menu for a roving truck and a rib shack in Kendall Square that closes for winter. The food lives up to the restaurant predecessor for the most part. In fact, there may be some subtle benefits to being outside the restaurant, with pulled chicken ($7) picking up some extra flavor from stewing. However, the macaroni and cheese ($5 pint), one of the highlights of the Somerville location, suffers, as it is congealed and fairly cold. The famous St. Louis ribs ($6 quarter-rack, $12 half-rack, $22 full rack) are delicious, with loose meat and only a bit of fat. The truck also out-duels its competitors in one key category: to-go packaging, replacing flimsy fair-style boats with durable containers.