The K1 is KMC's single-speed chain built for BMX and singlespeed riders, with reinforced tensile strength for hard use.

  • Reinforced construction for BMX and singlespeed durability
  • 112 links
  • Available in Narrow (3/32") and Wide (1/8") widths — check your freewheel/cog before ordering
  • Designed to reduce chain drop under hard riding

KMC's baseline single-speed/BMX chain, built for riders who put a singlespeed drivetrain through hard use rather than chasing the lightest possible build.

Fits singlespeed, fixed-gear and BMX drivetrains. Confirm whether your bike needs the Narrow (3/32") or Wide (1/8") width before ordering — the two are not interchangeable.

KMC chains are covered against manufacturing defects. If a chain fails from a defect in materials or workmanship, return it to Tune Cycles with your proof of purchase and we'll manage the claim with KMC on your behalf — no need to contact the distributor yourself. This is in addition to your rights under Australian Consumer Law, which apply regardless of any manufacturer's warranty.

  • Reinforced tensile strength for BMX/singlespeed use
  • 112 links
  • Narrow (3/32") and Wide (1/8") widths available
  • Chain-drop-resistant design
SpeedSingle speed
Links112
Width3/32" (Narrow) or 1/8" (Wide) — see options
UseBMX, fixie, singlespeed
SKU BPW-KMC-K1
Brand KMC