At first glance it does not look like wavy. However, if the tires started to bald and when touched, feels very clear. Even when bulldoze a smooth road, the effect will be more pronounced bump again. Especially try in derivatives with the engine off condition and one hand use. It feels like a churning.
Analysis of the causes of early due to lack of wind pressure or below standard size. So often the front braking suddenly and repeatedly. During braking, spontaneous overall load is concentrated at the front. So the recipient heaviest burden is on the front wheels. So if done repeatedly causes the tire tread surface bumpy.
One more reason, usually due street away. Tires so the heat and pressure inside the tire increases. When braking, the tire space narrowing due to braking. Pressure was moved to another part of the tire, causing a lump.
Handle it, get used to check tire pressure is determined in accordance. Reduce front braking suddenly and try to change the wind once a month or after a long trip
