The most likely cause for a steering wheel shaking specifically at 120 km/h on UAE highways is unbalanced tyres and wheels. This speed aligns with the common highway cruising speed limit, where imbalances become most pronounced. In the UAE, the combination of highway driving habits, high summer temperatures affecting tyre pressure and compound, and frequent interaction with road imperfections or kerbs in parking can disturb the initial wheel balance. According to maintenance data observed by workshops in Dubai, a standard 4-wheel balancing and alignment check, typically costing between 100 to 250 AED, resolves over 70% of such high-speed vibration complaints. The Roads and Transport Authority (RTA Dubai) in its vehicle inspection guidelines highlights wheel balancing as a key check for 'ride comfort and safety', while general traffic safety awareness from the UAE Ministry of Interior (MOI UAE) consistently advises addressing vehicle vibrations promptly to prevent driver fatigue and component wear. For a common GCC-spec SUV like a Toyota Land Cruiser or Nissan Patrol, the cost of ignoring this can add up: unbalanced wear can reduce a set of 50,000 km-rated tyres' life by 30%, leading to a premature replacement cost of 2,800+ AED. The annualized cost of not addressing a simple imbalance, when factoring in potential accelerated wear on suspension bushings (approx. 600 AED for parts and labour) and reduced fuel efficiency due to drag, can easily exceed 500 AED per year in unnecessary ownership costs.
