Development of the spoke-wheeled chariot is associated with the Proto-Indo-Iranians. The earliest fully developed chariots known are from the chariot burials of the Andronovo (Timber-Grave) sites of the Sintashta-Petrovka culture in modern Russia and Kazakhstan from around 2000 BC. This culture is at least partially derived from the earlier Yamna culture. It built heavily fortified settlements, engaged in bronze metallurgy on a scale hitherto unprecedented and practiced complex burial rituals, according to some scholars reminiscent of Aryan rituals known from the Rigveda. The Sintashta-Petrovka chariot burials yield spoke-wheeled chariots. The Andronovo culture over the next few centuries spreads across the steppes from the Urals to the Tien Shan, likely corresponding to early Indo-Iranian cultures which eventually spread to Iran and India in the course of the 2nd millennium BC.
The chariot must not necessarily be regarded as a marker for Indo-European or Indo-Iranian presence. According to Raulwing, it is an undeniable fact that only comparative Indo-European linguistics is able to furnish the methodological basics of the hypothesis of a "PIE chariot", in other words: "Ausserhalb der Sprachwissenschaft winkt keine Rettung!
The earliest evidence for chariots in southern Central Asia (on the Oxus) dates to the Achaemenid period (apart from chariots harnessed by oxen, as seen on petroglyphs). No Andronovian chariot burial has been found south of the Oxus.
No evidence of spoke-wheeled vehicles predating 2000 BC is known from either inside or outside of India.
The earliest chariot remains that have been found in India (at Atranjikhera) has been dated to between 350 and 50 BCE . It is also highly unlikely that a perishable item like the chariot could have been preserved in the Indian climate since Harappan times . There is evidence of wheeled vehicles (especially miniature models) in the Indus Valley Civilization, but not of chariots. Indus valley sites have offere numerous evidences of spoked wheels. Prof. B.B.Lal has irrevocably proved with convincing specimen, existence and use of spoked wheel chariots in Harappan Civilization. Bhirrana excavations 2005-06. Bhagwan Singh had made a similar assertion}} and S.R.Rao had had presented ecidence of chariots in bronze models from Diamabad(Late Harappan). This aspect appears to have been overlooked.
Chariots figure prominently in the Rigveda, evidencing their presence in India in the 2nd millennium BC. Among Rigvedic deities, notably Ushas (the dawn) rides in a chariot, as well as Agni in his function as a messenger between gods and men.
The Rigvedic chariot is made of Salmali (RV 10.85.20), Khadira and simsapa (RV 3.53.19) and other woods native to India.
In RV 6.61.13, the Sarasvati river is described as being big like a chariot. Measurements for the chariot are found in the Sulba Sutras. The number of wheels of the Rigvedic chariot varies. A similar term in the Rigveda is Anas (often translated as "cart").
Ratha or Rath means a chariot or car made from wood with wheels. The Ratha may be driven manually by rope, pulled by horses or elephants. Ratha's are used mostly by the Hindu temples of South India for Rathoutsava (Car festival). During the festival, the temple deities are driven through the streets, accompanied by the chanting of mantra, hymns, shloka or bhajan.