You mean 2 sprockets? Wouldn't that make it a 8 speed then?
No, just a 4 speed cassette/sprockets at the back.
Will work like a sack of shit... will only be worse from the current 2 speed which as soon as dirty is poor if you are lucky to have a shifter that works...
Huh? Did you even click the link?
@HoKe started
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You mean 2 sprockets? Wouldn't that make it a 8 speed then?