Strider 14X handlebar bushing
thingiverse
My kid's Strider 14X bike arrived without an upper bushing on the handlebars. We didn't catch it until a year later when we finally adjusted the handlebars and noticed the extra play due to the missing bushing. This bushing fits snugly; I had to tap it in with a mallet. You'll feel resistance when turning the handlebars, which will impact your turning ability. I just spun the handlebars several times until the resistance was worn down some. It has held up to a few days of use already, but I'm not sure how long it will last. Use at your own risk.
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