My prior info post was taken from tractordata.com
Using a better source, according to Kenneth Updike at Serial # 632502 IH changed the front wheel rims and bearings to a 1" spindle/bearing from the 3/4" spindle/bearing to handle heavier weights of implements and loads.
Here is the tire/rim size options from Ken Updike's "50 Years Of Cub Cadet".
800:
4.80x8 front tires
23x8.50 rear tires
1000
4.80x8 front tires/.75" spindles
16x6.50 front tires/1" spindles
23x8.50 rear tires
1100
4.80x8 front tires/.75" spindles
16x6.50 front tires/1" spindles
23x8.50 rear tires
1200
4.80x8 front tires/.75" spindles
16x6.50 front tires/1" spindles
23x8.50 rear tires
1250
16x6.50 front tires/1" spindles
23x8.50 rear tires
1450
16x6.50 front tires/1" spindles
23x10.50 rear tires
1650
16x6.50 front tires/1" spindles
23x10.50 rear tires
I should have checked his book first.
