For example, Issigonis specified wheels for the Mosquito, with 5.20-14 Dunlop Crossply tyres, (145R14 is the radial alternative). These were smaller than any other production car of the time (the existing Morris Eight had wheels). These small wheels reduced intrusion into the cabin space and minimised the car's unsprung mass, giving better ride comfort and stability. For the same reasons, the wheels themselves were placed as far as possible towards each corner of the Mosquito's floorpan. The same went for the placement of the engine, as far as possible towards the front of the engine compartment. Most cars of the time had a front beam axle, which forced the engine to be mounted behind the front axle line. While this meant that, with only a driver on board, the weight distribution was fairly even, when laden with passengers, cars often became severely tail-heavy, leading to unstable handling and oversteer. The new Morris's independent suspension meant there was no front axle, allowing the engine to be placed low down and far forward. Putting the Mosquito's engine in the nose meant that the car was nose-heavy when lightly laden, leading to superior directional stability, and when fully laden it achieved nearly equal weight balance, so handling and grip remained good regardless of the load carried. Placing the engine further forward also maximised cabin space. As proposed by Issigonis, the engine itself was also radical, being a water-cooled flat-four unit. One of Miles Thomas's few restrictions on the Mosquito project was that it had to have an engine that would not fall afoul of the British horsepower tax, which taxed cars under a formula relating to their engine cylinder bore. At the same time, Thomas wanted the car to appeal to the all-important export markets, which had no such restrictions, and generally favoured larger-engined cars. Issigonis' solution was the flat-four engine, which could easily be produced in two versions – a narrow-bore 800-cc version for the British market and a wide-bore 1100-cc version for export. Both versions would use identical parts, except for the actual cylinder blocks (which could still be produced on the same machinery) and the pistons. The flat-four layout reduced the overall length of the engine, further increasing potential cabin space, and reduced the car's centre of gravity for improved handling. Pre-production changes The engine was to prove a step too far for the Mosquito project. As the car approached