Four track units, one quad, and what it takes to put them on.

Three systems are in wide circulation for quads, one outsider is rated against vehicle weight rather than engine size, Polaris sells its own on its own machines, one was withdrawn without a notice, and the rest turn up second-hand. What each one is built for, what the published figures actually say, how an order for it is assembled — and what none of their makers publishes at all.

Which makes and model years anybody publishes an ATV track application for, how many rows each make carries, and which rows come with a manufacturer condition attached. Start with your make, then with the field that decides which of its rows is yours.

The work that happens before fitment. What is this machine called, what is bolted to it already, and which of the several names each manufacturer uses will actually find your rows.

Camso flags conditions on individual applications and publishes a legend for the letters. It never publishes what a condition means on the bench — what comes off the machine, what gets cut, what you have to buy separately. These pages take the flags one at a time and say which machines carry them.

A tracked quad is a legal edge case almost everywhere, and almost nobody publishes on it. Per jurisdiction, quoted and linked, with the date the page was read. No generalisations.

A set goes on in the autumn, comes off in the spring, and spends six months in a corner. Storage, the changeover and buying somebody else's used system are the ownership events that cost money, so they come first.

How a tracked quad behaves on the ground you actually ride: what it floats over, what stops it, and what the manufacturer says to stay off. Dated and regional, because terrain is.