JT Sprockets
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JT Sprockets 525 Zinc Black Heat-Induction Hardened Rear Sprocket, 42T (JTR1331.42ZBK)

Part # JTR1331.42zbk
Item #210060
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
JT Sprockets Zinc Black Heat-Induction Hardened Rear Sprocket — JTR1331.42ZBK (42T)
Product Details

JT's zinc-black plated rear sprocket — same steel core as JT's standard rear, plus a black finish and the heat-induction hardening that holds up better on hard-ridden street bikes.

  • Heat-induction hardened tooth crowns extend service life under aggressive street and trackday use.
  • Zinc-black plating for corrosion resistance and the murdered-out look.
  • CNC-machined to OEM bolt pattern; drops in without modification.
  • Same fitment universe as JT's steel rear in this base number.
  • Built by JT Sprockets in the UK and Thailand.

Intended use: street, sport, trackday.

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