<p>A pneumatic tire for a bicycle in which turning performance on a wet pavement is enhanced as compared with that of a conventional tire. Assuming the region of 60% of the development width of a tread (28) is a tread central portion and the outside of the tread central portion in the direction of tire width is a tread side portion, a plurality of wide inclination grooves (42) and narrow inclination grooves (44) extending while inclining at an angle of smaller than 90° to the circumferential direction of the tire are formed in the tread side portion to continue over a region of 50% or more of the width thereof. The narrow inclination groove (44) has a groove width set in the range of 0.3-2.5 mm. On the tread side portion, a total area of the wide inclination grooves (22) is set at 20% or less of the area of the tread side portion. Consequently, both drainage performance and block rigidity can be satisfied at a high level at a ground contacting portion during turning, and a higher grip force than before can be attained during turning on a wet pavement.</p>
