The driver's speed, acceleration, braking, and steering Tire tread wear: Worn tires will aquaplane more easily for lack of tread depth. Half-worn treads result in aquaplaning about 3–4 mph (5–7 km/h) lower than with full-tread tires.[1] Tire inflation pressure: Underinflation can cause a tire to deflect inward, raising the tire center and preventing the tread from clearing water. Tire tread aspect ratio: The longer and thinner the contact patch, the less likely a tire will aquaplane. tires that present the greatest risk are small in diameter and wide. [citation needed] Vehicle weight: More weight on a properly inflated tire lengthens the contact patch, improving its aspect ratio.