The Redcat Racing RER42134 is a high-performance drivetrain upgrade designed specifically for the Ascent-18 Apex. This "one-piece" design integrates the ring gear and the differential spool into a single solid unit, eliminating the screws and mounting points that can become failure points under high-torque brushless power. With a 20T (20-tooth) count, these gears are optimized for the Apex’s specific gear reduction needs, providing a robust and reliable connection to the axles.
Vehicle Compatibility
This gear set is standard for the Apex and a performance upgrade for other 1/18 models (when paired with the correct pinion):
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Ascent-18 Apex (Direct replacement)
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Ascent-18 / Scout II (Upgrade – requires RER42135 8T Diff Pinion for proper mesh)
Key Features
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Ultra-Durable One-Piece Design: By combining the spool and gear, Redcat has removed the risk of ring gear screws backing out or shearing off during intense technical crawls.
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Precision Machined: The 20T gear is engineered for smooth mesh and minimal friction, helping to maximize the efficiency of your brushless motor system.
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Locked Differential: As a spool, it ensures both wheels on the axle spin at the same speed at all times, providing the 100% traction required for rock crawling.
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Optimized for High Torque: Built to handle the increased power of 2S and 3S brushless setups without stripping or deforming.
Technical Specifications
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Scale: 1/18
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Tooth Count: 20T
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Material: Heavy-Duty Steel
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Includes: 2 One-Piece Spool/Ring Gears
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Note: Only compatible with the 8T Diff Pinion (RER42135).
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Part Number: RER42134
