T-18's chassis and suspension was improved from the T-16 by the addition of an extra support roller and an independent vertical spring suspension. The 300 mm track of the T-16 was transferred over to the T-18, with some improvements. The engine, a vertical, four-cylinder MS engine, was designed and improved upon by Alexander Mikulin. The engine was capable of a maximum of 35 horsepower. Bhí an t-inneall MS comhcheangailte leis an tarchur PSC in aonad amháin seachas a bheith i dhá chatach ar leithligh. Thug an tarchur PSC an tanc ceithre luas ar aghaidh agus luas amháin ar chúl.
uasmhéid 35 capair