which allows to change suspension stiffness and handling very quickly

We recommend tire diameter not bigger than 620mm (235/40 R17)

The upgraded knuckle has been reinforced and has more room for bump steer adjustment

but then the factory designed kinematics wouldn't work as it supposed to

The knuckle has been designed to allow more suspension travel with the trending long stroke coilovers

JR Wheels JR37 21x11,5 ET17-60 5H BLANK Custom Finish CB: 74,1 Mazda which allows to change suspensionPCD: 5x108, 5x110, 5x112, 5x114. 3, 5x115, 5x118, 5x120, 5x120. 6, 5x127, 5x130 ET: 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60