Quick Summary
The Lanturn Bicycle Crank Bearing is a 4-piece set of ball bearings for a bike crank bottom bracket. The set uses 5/16 x 7 ball size and is described as a replacement part for bicycle crank applications.
This pack includes 4 pieces, with one pair for replacement and another for spare use. If you are choosing this part for a bike, the key check is whether the bearing size matches the crank or bottom bracket you need to replace.
What to Compare Before Buying
- Size: The bearing is listed with an outside diameter of 1.46 inches / 37.5 mm and an inside diameter of 0.94 inches / 24 mm. Compare these measurements with the part you are replacing.
- Ball size: The set is described as 5/16 x 7 balls. Check that this matches your crank bearing requirement.
- Quantity: The package includes 4 pieces. Confirm that this is the quantity you need for the repair or spare set you want.
- Use case: It is described for bicycle crank and bottom bracket replacement, including mountain bikes, kids bicycles, lowrider bikes, children’s bikes, and stretch bicycles.
Choosing the Correct Version
Bearings like this one are size-specific. Compare the outside diameter, inside diameter, and ball size before buying so the replacement matches your bike part.
Before You Decide
Confirm the 4-piece quantity, the 5/16 x 7 ball size, and the stated diameters before choosing an offer. If the measurements do not match your bike crank or bottom bracket, a different bearing size is needed.





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