First mod · Universal upgrade
Bearings
Replace plastic bushings with ball bearings. The highest impact-per-dollar upgrade on any Mini-Z.
Why it matters
Stock Mini-Zs use injection-molded plastic bushings that create rolling resistance and wear quickly. Ball bearings eliminate drag, free up the drivetrain, and are the single mod that belongs on every car before anything else.
Recommended Parts Affiliate links · no extra cost to you
Fast Eddy Sealed Bearing Kit (MR-03)
Sealed bearings for the MR-03. What I run on mine. Drop-in replacement, sealed so they do not grit up.
Shop →Mini-Z Ball Bearing Set (7pcs)
OEM replacement bearings. Drop-in fit, no modification needed.
Shop →Hybrid Ceramic Bearing Set — MR-03
Ceramic balls, steel races. ABEC 7 rated. Lower friction than steel, no rust.
Shop →Full Ceramic Bearing Kit (8pcs)
Full ceramic races and balls. Lowest rolling resistance available. Fits MR-02/MR-03/MR-015.
Shop →MR-04 Ball Bearing Full Set
Complete bearing set sized for the MR-04 drivetrain. Not interchangeable with MR-03 sets.
Shop →MX-01 Replacement Parts & Bearings
Crawler-specific bearing sizes for the MX-01 portal axle drivetrain.
Shop →Related Guides
Mini-Z Bearing Upgrades: Ceramic vs Steel
Not all Mini-Z bearings are worth upgrading. Here's which positions actually change handling, ceramic vs steel trade-offs, and what to buy at every budget.
Best First Mini-Z Upgrades: 5 Mods That Matter
New Mini-Z owner? Do these 5 upgrades before anything else. Ranked by real-world impact per dollar, starting with the one mod every car needs first.