21. An unidentified six-wheel brake also resides in storage with the National Museums & Galleries of Wales. 22. It was superseded by the 23-60 which had an overhead valve engine and four wheel brakes . 23. This reduced the downforce on the main wheels thereby reducing the effectiveness of the wheel brakes . 24. The Mors 60 horsepower transmission that drove the rear wheels via chain drive, and rear-wheel brakes . 25. Another innovation in the V-63 was front-wheel brakes . 26. Key developments included electric suspension, and four-wheel brakes . 27. No . 238 and an unidentified six-wheel brake resides with the National Museums & Galleries of Wales. 28. Amongst other failures, this also degraded the wheel brakes , and the nose wheel steering would not function. 29. Another common cause is failure of a tire or wheel brake , causing a loss of directional control. 30. Four wheel brakes using the Perrot system were fitted and the chassis carried a six-light saloon body.
