RZR S 900 Tire weight question December 1, 2015 At what weight will tires become too heavy for a stock 900 motor. I’m sure other parts are a weaker link, axles, diff, clutch. But with all that upgraded/ignored just for discussion. what is the ideal tire/wheel weight on a stock motor. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related