style: B - Mountain Bike 27 Speed 30 Speed Chain Folding Road Bike High Speed Chain Gulf Models 6 million high negative oxygen

6 million high negative oxygen ion release

powered by the lithium battery

Measurement accuracy: standard

Vehicle Speed

guarantees the use of medium pressure resistance

style: B - Mountain Bike 27 Speed 30 Speed Chain Folding Road Bike High Speed Chain Gulf Models 6 million high negative oxygenProduct information: Material: Metal Style: Simple Features: high speed chain Colour: Picture color Style A: Gray 8 24 speed with chain oil Style B: Silver 9 27 speed, free chain oil, magic buckle Style C: Silver hollow 9 27 speed, free chain oil, magic buckle Style D: Colorful hollow 9 27 speed, free chain oil, magic buckle Style G: Silver 10 30 speed, free chain oil, magic buckle Style H: Silver hollow 10 30 speed, free chain oil, magic buckle