Pneumatic tire

A pneumatic tire, comprising:

• a tread portion provided with a circumferential land region, the circumferential land region provided with a plurality of combined sipes,
• wherein:
• each of the combined sipes is composed of
• a straight portion extending from one edge toward the other edge of the circumferential land region, and
• an arc-shaped portion extending from the straight portion to the other edge of the circumferential land region, and
• the combined sipes include
• a first combined sipe in which the maximum depth of its arc-shaped portion is larger than the maximum depth of its straight portion, and
• a second combined sipe in which the maximum depth of its straight portion is larger than the maximum depth of its arc-shaped portion,
• the circumferential land region comprises a plurality of blocks divided by lateral grooves extending across the entire width of the circumferential land region,
• each of the blocks is provided with sipes which are a pair of the first combined sipe and the second combined sipe and a longitudinal sipe extending between the first combined sipe and the second combined sipe, and
• in each of the blocks, a chamfer extending obliquely between a ground contacting top surface and a side surface of the block is provided on only an in-between part of the block between the first combined sipe and the second combined sipe.

A pneumatic tire comprising

• a tread portion provided with a circumferential land region, the circumferential land region provided with a plurality of combined sipes,
• wherein:
• each of the combined sipes is composed of
• a straight portion extending from one edge toward the other edge of the circumferential land region, and
• an arc-shaped portion extending from the straight portion to the other edge of the circumferential land region, and
• the combined sipes include
• a first combined sipe in which the maximum depth of its arc-shaped portion is larger than the maximum depth of its straight portion, and
• a second combined sipe in which the maximum depth of its straight portion is larger than the maximum depth of its arc-shaped portion,
• the maximum depth (d1) of the arc-shaped portion of the first combined sipe and the maximum depth (d4) of the straight portion of the second combined sipe are in a range from 0.65 to 0.75 times the depth (d5) of a crown main groove disposed adjacently to the circumferential land region on the axially inside thereof,
• the maximum depth (d2) of the straight portion of the first combined sipe and the maximum depth (d3) of the arc-shaped portion of the second combined sipe are in a range from 0.45 to 0.55 times the depth (d5) of the crown main groove, and
• the first and second combined sipes have a length L3 in the tire axial direction, and each of the first and second combined sipes has a portion having its maximum depth (d1, d4) of which length (L4) in the tire axial direction is 0.30 to 0.40 times the length L3.