Bearings

Bearings: the thin shells your crank and rods actually ride on

Engine bearings are the replaceable friction surfaces between rotating steel and the block or rod. Main bearings support the crankshaft in the block; rod bearings sit between the connecting rod big end and the crank journal. They carry the oil film that keeps metal off metal, so when you rebuild, refresh a high-mile engine, or open one up after a spun bearing, these get replaced as a set. Sizing matters: bearings come in standard and oversized clearances to match a crank that has been reground, which is why you see options like standard and .025mm on the same fitment.

What ThreePiece stocks

There are 628 bearing listings here, priced from $24 to $1,640 at current stock levels - not a locked-in quote. Fifteen brands are represented. The range is led by King Engine Bearings (454 listings), followed by Clevite (105) and ACL (35), with smaller counts from TwinPower, QuadBoss, S&S Cycle, Ford Racing and others. Concrete examples span the price ladder: the King McLaren M838T/M840T main set and the King BMW M5 E60 S85 coated rod bearing set at the top, the Clevite Dodge Viper V10 main set and the Clevite Cummins B Series main set in the middle.

Fitment data is attached to 147 of these products, covering model years from 1936 to 2024. Named makes include Dodge, Ford, Mini, Audi, BMW, Chevrolet, Toyota, Harley-Davidson, Chrysler, Mazda, Nissan, Polaris and Honda, on vehicles from the Dodge Neon and Mini Cooper to the Audi R8, Toyota Supra, GM LS and Polaris XP1000.

How to choose

Two things drive the pick: the exact engine and the crank clearance. Buy the set built for your engine family - a Cummins B set and a Viper V10 set are not interchangeable. Then match clearance. If the crank is standard, use standard bearings like the ACL N63/S63 standard main bearings; if it has been reground undersize, step to an oversized shell such as the ACL .025mm oversized version. Coated and graded sets, like the King M5 rod bearings, cost more and are aimed at high-load builds. When in doubt, measure with plastigage before you commit.

What else you need

Bearings go in as part of a bottom-end job, so plan the rest of the rebuild at the same time. Look at Pistons and Head Gaskets, and grab sealing hardware from Gasket Kits. Keep the oil system honest with Oil Filters and the fuel side sorted through Fuel Injectors. Browse the full Engine Components section for anything else the teardown turns up.

Fitment and ordering

All orders ship free, and Affirm and Katapult financing is available. If you are unsure which set matches your engine and crank clearance, call fitment help at 813-535-5801 or reach us through contact before you order.

Bearings: the thin shells your crank and rods actually ride on

Engine bearings are the replaceable friction surfaces between rotating steel and the block or rod. Main bearings support the crankshaft in the block; rod bearings sit between the connecting rod big end and the crank journal. They carry the oil film that keeps metal off metal, so when you rebuild, refresh a high-mile engine, or open one up after a spun bearing, these get replaced as a set. Sizing matters: bearings come in standard and oversized clearances to match a crank that has been reground, which is why you see options like standard and .025mm on the same fitment.

What ThreePiece stocks

There are 628 bearing listings here, priced from $24 to $1,640 at current stock levels - not a locked-in quote. Fifteen brands are represented. The range is led by King Engine Bearings (454 listings), followed by Clevite (105) and ACL (35), with smaller counts from TwinPower, QuadBoss, S&S Cycle, Ford Racing and others. Concrete examples span the price ladder: the King McLaren M838T/M840T main set and the King BMW M5 E60 S85 coated rod bearing set at the top, the Clevite Dodge Viper V10 main set and the Clevite Cummins B Series main set in the middle.

Fitment data is attached to 147 of these products, covering model years from 1936 to 2024. Named makes include Dodge, Ford, Mini, Audi, BMW, Chevrolet, Toyota, Harley-Davidson, Chrysler, Mazda, Nissan, Polaris and Honda, on vehicles from the Dodge Neon and Mini Cooper to the Audi R8, Toyota Supra, GM LS and Polaris XP1000.

How to choose

Two things drive the pick: the exact engine and the crank clearance. Buy the set built for your engine family - a Cummins B set and a Viper V10 set are not interchangeable. Then match clearance. If the crank is standard, use standard bearings like the ACL N63/S63 standard main bearings; if it has been reground undersize, step to an oversized shell such as the ACL .025mm oversized version. Coated and graded sets, like the King M5 rod bearings, cost more and are aimed at high-load builds. When in doubt, measure with plastigage before you commit.

What else you need

Bearings go in as part of a bottom-end job, so plan the rest of the rebuild at the same time. Look at Pistons and Head Gaskets, and grab sealing hardware from Gasket Kits. Keep the oil system honest with Oil Filters and the fuel side sorted through Fuel Injectors. Browse the full Engine Components section for anything else the teardown turns up.

Fitment and ordering

All orders ship free, and Affirm and Katapult financing is available. If you are unsure which set matches your engine and crank clearance, call fitment help at 813-535-5801 or reach us through contact before you order.