EK/PBR 420SR Chain Kit 13/51 - Ultra-Light Sprocket
Designed for urban two-wheelers and small displacement bikes, this EK SR chain kit combines strength and lightness. The SR series features a design that maintains the chain's flexibility even after prolonged use: the plates undergo a specialized heat treatment that enhances their durability and wear resistance without stiffening the entire assembly.
- Pitch: 420
- Number of Links: 136
- Sprocket: ultra-light aluminum to reduce unsprung weight
- Chain: steel/steel finish
- Weight: 0.75 kg / 100 links
- Relative Lifespan: 200 (value for 100 links)
- Mounting Representation: 13 tooth sprocket / 51 tooth sprocket
Ideal for daily urban use, this kit is aimed at riders seeking a reliable and lightweight transmission for their 50cc bikes. It is particularly suitable for BETA RRT 50 ENDURO TRACK, RRT 50 ENDURO RACING, and RRT 50 ENDURO (2013) models. Standard mounting on shafts with a 420 pitch; regular inspection and tensioning are recommended to optimize longevity.
