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This is an optional Team Associated 42 Tooth Factory Team Diff Ring Gear. To use this optional 42 tooth ring gear, you must use the optional 12 tooth pinion gear.
The RC8B3 and RC8B3e come stock with a 44 tooth ring gear (ASC81002) which is to be used with the stock 13 tooth pinion gear (ASC81003).
This product was added to our catalog on April 21, 2016