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Exact actuation shifting Aeroglide pulleys with BlackBox hybrid ceramic bearings. Max tooth 28T short cage/32T medium cage (WiFli) 145g SRAM Model ID: RD-RED-B1 Attributes Minimum Cog 11T Primary Color Silver RD Capacity 31T RD Weight 145g Speed 10
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🇺🇸 Ship from USA · On Agora since 2025
$330.00