Heavy duty tire

A tire includes a tread formed from a rubber composition containing: a rubber component including a styrene butadiene rubber; and a filler including silica. The tread has a plurality of circumferential main grooves . The plurality of circumferential main grooves define a pair of crown land portion in the tread . Each crown land portion has a crown narrow groove . Each crown narrow land portion defined by the crown narrow groove has a crown sipe . An amount CSB of the styrene butadiene rubber, an amount BS of the silica, a groove depth DGs of the crown sipe , and a groove depth DGg of the crown narrow groove satisfy the following relational expression.