Description
A worn or undersized rear sprocket directly impacts your BMW’s acceleration, top-end speed, and chain longevity. The JT Sprockets 42-tooth rear sprocket restores optimal power delivery with precision engineering and durability that withstands high-rpm demands. Built from premium C45 high-carbon steel and heat-treated for maximum strength-to-weight ratio, this sprocket delivers consistent performance whether you’re track-focused or pushing daily limits.
- Tooth Count: 42T
- Material: C45 high-carbon steel
- Heat-treated construction
- Bead-blasted finish
- Computer-designed geometry
- Optimized strength-to-weight
- BMW-specific fitment
- Industry-leading durability
- Exceeds OEM standards
- Bolt-on installation
- MPN: JTR6.42
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