Wide-Narrow Chainring (1x)

The direct fix for the Walmart bike dropping its chain on the baseline run. Alternating tooth widths mesh with the chain's own alternating links, so a single ring holds better than a triple — and there's no front mech to go wrong.

• “A chain goes wide, narrow, wide, narrow. What a wide-narrow chainring does is line up the teeth with the wide-narrow holes — a tooth made for a wide spot, a tooth made for a narrow spot. That keeps the chain more secure.”

  Watch at 6:45 ↗We Put $1000 Parts on a $50 Walmart Bike

1xchain retentionsingle ring