Centuries: 8th century - 9th century - 10th century
Decades: 780s - 790s - 800s - 810s - 820s - 830s - 840s - 850s - 860s - 870s - 880s
Years: 830 831 832 833 834 835 836 837 838 839
... mechanical parts.
Groupsets commonly include: chainset[?] comprising cranks[?] and chainrings[?]; chain; rear gear cogs or cassette; gear shift levers; brakes; ...
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