Kyosho® Ultima® II Replacement RC Car Parts

A selection of replacement parts for Kyosho®. 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 - 4x8x3 mm - Stainless Steel AISI 440C - Replaces -
BB 4-8-3
Replacement Bearing - Stainless Flanged Bearing Shielded Option

Replacement Part: SFMR84A-ZZ-MC3 (Each)
Double shielded flanged stainless steel bearing

Single Row Ball Bearings - 4x8x3 mm Flanged - Stainless Steel AISI 440C Bearing

$9.95
Temporarily Out Of Stock -> More due: Jun 10, 2026 -> Orders for more than 0 can be expected around Jun 12, 2026
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Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - Replaces -
BB 4-8-3
Bearing - Standard Bearing Shielded Option

Replacement Part: MR84A-ZZ-MC3 (Each)
Double shielded standard bearing

Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing

$3.59
193 Available Now -> Orders for more than 193 can be expected around Jun 18, 2026
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Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100 - Replaces -
BB 4-8-3
Bearing - Economy Bearing Shielded Option

Replacement Part: MR84A-ZZS-ECO (PK-5)
Double shielded economy bearing

Single Row Ball Bearings - 4x8x3 mm Unflanged - Chrome Steel SAE 52100 Bearing

$4.14
43 (215 pcs) Available Now -> Orders for more than 43 can be expected around Jun 12, 2026
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Single Row Ball Bearings - 5x10x4 mm - Chrome Steel SAE 52100 - Replaces -
BB 5-10-4
Bearing - Standard Bearing Shielded Option

Replacement Part: MR105A-ZZ-MC3 (Each)
Double shielded standard bearing

Single Row Ball Bearings - 5x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing

$3.77
419 Available Now -> Orders for more than 419 can be expected around Jun 18, 2026
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Single Row Ball Bearings - 5x10x4 mm - Chrome Steel SAE 52100 - Replaces -
BB 5-10-4
Bearing - Economy Bearing Sealed Option

Replacement Part: MR105A-2RB-ECO (PK-5)
Deleted Item. Available while stocks last. Double blue rubber sealed economy bearing

Single Row Ball Bearings - 5x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing

$4.50 $8.55
80 (400 pcs) Available Now -> Only the available quantity may be ordered online. No backorders.
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Single Row Ball Bearings - 8x14x4 mm - Chrome Steel SAE 52100 - Replaces -
BB 8-14-4
Bearing - Standard Bearing Shielded Option

Replacement Part: MR148A-ZZ-MC3 (Each)
Double shielded standard bearing

Single Row Ball Bearings - 8x14x4 mm Unflanged - Chrome Steel SAE 52100 Bearing

$6.05
80 Available Now -> Orders for more than 80 can be expected around Jun 12, 2026
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Single Row Ball Bearings - 8x14x4 mm - Chrome Steel SAE 52100 - Replaces -
BB 8-14-4
Bearing - Standard Bearing Sealed Option

Replacement Part: MR148A-2RS-MC3 (Each)
Double rubber sealed standard bearing

Single Row Ball Bearings - 8x14x4 mm Unflanged - Chrome Steel SAE 52100 Bearing

$4.86
73 Available Now -> Orders for more than 73 can be expected around Jun 18, 2026
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