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WE TOOK 495 GRAMS FROM THE BIKE, transforming a 3-ring crankset into 1, a 1x12 upgrade with the best cost-benefit, we used a Deore M6100 gearbox, an M6100 shifter, an Absolute 12v 11x50 cassette, a KMC 12v chain and a Deckas bcd104 34t crown, we adjusted the stops, we adjusted the gears in every detail, it's worth watching until the end, the bike is top!!! Abolute 12v cassette https://mercadolivre.com/sec/1RuTYvZ M6100 derailleur https://mercadolivre.com/sec/19C9oES Racework crank https://mercadolivre.com/sec/2vFZF79 kmc 12v chain https://mercadolivre.com/sec/1vgvmES / alissonbikevida M5100 derailleur https://s.click.aliexpress.com/e/_DmN... KMC chain https://s.click.aliexpress.com/e/_DFq... Sunshine cassette https://s.click.aliexpress.com/e/_DBM... Racework crank https://s.click.aliexpress.com/e/_DEe...