Roadrunner® Replacement RC Car Parts

A selection of replacement parts for Roadrunner®. These parts are not original parts unless otherwise stated in the descriptions. Please check your choices thoroughly.

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Replacement Parts Price Quantity
Single Row Ball Bearings - 3x6x2 mm - Stainless Steel AISI 440C - Replaces -
Roadrunner® XPRESS Pro MK1: BB 3-6-2
Roadrunner® XPRESS Pro MK1: Bearing - Stainless Bearing

Replacement Part: SMR63-MC3-AF12 (Each)
Open standard stainless steel bearing

Single Row Ball Bearings - 3x6x2 mm Unflanged - Stainless Steel AISI 440C Bearing

$4.32
18 Available Now -> Orders for more than 18 can be expected around Jun 18, 2026
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Single Row Ball Bearings - 3x6x2.5 mm - Chrome Steel SAE 52100 - Replaces -
Roadrunner® XPRESS Pro MK1: BB 3-6-2.5
Roadrunner® XPRESS Pro MK1: Bearing - Standard Bearing

Replacement Part: MR63A-ZZ-MC3 (Each)
Double shielded standard bearing

Single Row Ball Bearings - 3x6x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing

$3.86
38 Available Now -> Orders for more than 38 can be expected around Jun 18, 2026
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Single Row Ball Bearings - 8x12x3.5 mm - Chrome Steel SAE 52100 - Replaces -
Roadrunner® XPRESS Pro MK1: BB 8-12-3.5
Roadrunner® XPRESS Pro MK1: Bearing - Standard Bearing Shielded Option

Replacement Part: MR128A-ZZS-MC3 (Each)
Double shielded standard bearing

Single Row Ball Bearings - 8x12x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing

$3.23
52 Available Now -> Orders for more than 52 can be expected around Jun 18, 2026
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Single Row Ball Bearings - 8x12x3.5 mm - Stainless Steel AISI 440C - Replaces -
Roadrunner® XPRESS Pro MK1: BB 8-12-3.5
Roadrunner® XPRESS Pro MK1: Bearing - Economy Bearing Sealed Option

Replacement Part: SMR128A-2RS-ECO (PK-5)
Double black rubber sealed economy bearing

Single Row Ball Bearings - 8x12x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing

$8.68
23 (115 pcs) Available Now -> Orders for more than 23 can be expected around Jun 12, 2026
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