Imagine a disc witch has a radius of R=1000m and a mass M=1000kg, this disc sits on an cube that is considered static it has no velocity in any direction whatsoever. There is a light clock with the length L=17.45240644m (approximately the same as the arc length for 1 degree on the disc θ=1) siting at the edge of the disc (point R=1000m) it sits as parallel as possible to the edge of the disc. The Disc is spinning at a velocity of V=0.75C (C=3x108). Due to the fact that its velocity is constant (disregarding direction) We may say that at any point in time V=0.75C. Imagine another light clock that will be identical to the first. This new light clock sits on the cube completely static but in the perfect position that when the first clock passes they are parallel. if the second light clock measures T= 100s than due to T=T'/γ (where γ is the Lorenz contraction equation) T' = 66.14s (T' is measured by the clock on the disc) because as i said before the disc is moving at a constant velocity so we may say that the change in time is 100s and the velocity is 0.75C. Applying the same rules i equate that M'=1511.857892kg and L'= 11.5436818 going further this would cause the circumference to contract witch would then cause the radius to shrink Cc= circumference Cc'=2πR' 2γD/2π = R' ( D= 360/θ as i said before L is approximately equal to the arc of θ) R'= 661.4042475m and Rγ= 661.4042475m so R'=Rγ I am eager to read any input given to me, Cheers.