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New rear transmission gear change box adaptable for city bike, road, MTB (all-terrain bike), Mountain Bike, racing, Fat Bike, FatBike, eBike electric bike or VAE...
The rear derailleur is attached to the bicycle frame. It moves sideways to guide the chain over the rear wheel cassette to change cogs. This spring mechanism also maintains a constant chain tension so as not to derail.
Sunrace is a Taiwanese brand specializing in the production of parts for bicycles. To discover our range of Sun productsrace, click on this link.