What is the maximum slope I can safely mow on with this tractor?
You should not operate the T100 Series Lawn Tractor on slopes greater than 15 degrees. Use the Slope Gauge included in the manual to measure slopes before mowing. Always mow up and down slopes, never across them, and if you cannot back up the slope or feel uneasy on it, do not mow it. (Page 4)
From the official Craftsman T100 Series Lawn Tractor manual, page 4
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