Shop for Riding Lawn Mowers at The Home Depot. The John Deere D105 riding lawn tractor offers a 42 in. deck and 17.5 HP engine. The automatic transmission with 3 position (F, N, R) lever and single pedal foot control allows you to set your own pace while mowing forward and reverse with speeds up to 5.5 mph. The 42 in. deck will give you a superior cut quality and is ready to side discharge, bag, or mulch.