Those rear tires you have on there in the back might just be up to the task without the chains in light/medium snow. Though, I'd put some rear weights back there. In heavier snow, the chains get the job done. This is my experience with 42" blade on gravel driveway. Your results may vary.
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Two 125's and a 124 all with 42" decks
Plow blade
#2 Cart
QA36 snowthower
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