The practice of archaeological research often illustrates situations where the sum of facts does not corre-spond to the cultural-historical approach; it is impossible to squeeze this sum into the framework of the term “ar-chaeological culture”. Deviations from his canonical understanding of the term may relate to the duration of the phenomenon, its spatial distribution or the degree of stereotyping of material culture and rituals. The frontier can be one of the options for interpreting such non-standard groups of archaeological objects. The purpose of the study is to test the possibilities of using the concept for the interpretation of the Sintashta sites of the Bronze Age of the Southern Urals (the turn of 3rd — 2nd millennium cal BC) in the light of new data from a comprehensive study (paleogenetics, chronology, etc.). Sintashta settlements and cemeteries are located on the compact territory of the northern steppe: settlements in the Trans-Urals, the burial ground — on both sides of the Ural Mountains. Previous studies have accumulated a huge amount of data on all major aspects, but the general concept remains debatable. The new data comes from mass radiocarbon dating, which allowed to use Bayesian modeling. New data of mass radiocarbon dating confirm the brevity of the functioning of the Sintashta settlements and burial grounds, as well as the possibility of partial synchronization of this tradition with others. Paleogenetic analyzes (more than 50 samples) have shown the heterogeneity of the Sintashta population. Peleogenetic data made it possible to diagnose traces of a subtratian population absorbed by the main migratory group. In material culture, The evidences in material culture are not traced. The same data confirmed a special scenario for the formation of necropolises, weakly associated with the consanguinity of the buried individuals. Only 1/5 of the deceased turned out to be relatives of the first and second degree. The new data significantly complement the previously formulated crite-ria, which allow us to consider the group of Sintashta sites as a reflection of the situation of the frontier. The Sin-tashta society in the frontier was formed as complex society. But it did not have the prospect of forming statehood.