Thanks for the speedy reply. Will keep looking. However if I must replace all 4 wheels on this old getting tired tractor (I expect 8-10 horses have run away - has a front loader on it so extra weight on the front wheels). Should I go down to 16" front with the correct rear wheel ratio, or go up to the 24" front with the correct rear wheel ratio - Does it make a difference if tractor speed and ground clearance are not really a concern. Will either affect the loader negatively I guess. (advice from a wrecker to change the wheels to a common size). Thanks again.