Bearings for Home Trainers and Exercise Bikes

High-quality bearings are essential for the smooth and quiet operation of home trainers, exercise bikes, indoor cycling systems and professional fitness equipment. Whether you repair, maintain or manufacture fitness machines, reliable bearings ensure stability, long service life and precise movement under constant load.

What types of bearings are used in exercise bikes?

• Deep groove ball bearings – the most common choice for crankshafts, flywheels and rotating pedals.
• Needle roller bearings – used where compact design and high load capacity are required.
• Sealed bearings (2RS / 2RSH / 2HRS) – protect against sweat, dust and humidity inside fitness equipment.
• Specialized flywheel bearings – designed for continuous high-speed rotation and long durability.

Typical bearing sizes for fitness equipment

Although every manufacturer uses different components, the most common bearing dimensions found in home trainers and exercise bikes include:

• 6000, 6001, 6002, 6003 series
• 6201, 6202, 6203 series
• 6900, 6901, 6902 slim bearings
• NK / HK needle bearing series

Where are bearings used inside a fitness trainer?

• Crank mechanism – ensures smooth pedaling and minimal friction.
• Flywheel or magnetic resistance system – requires precise high-speed bearings.
• Drive belt pulleys – keeps rotation stable even under heavy resistance.
• Pedal shafts – handles repeated axial and radial loads.
• Adjustment wheels and rotating tension systems – often fitted with small sealed bearings.

Why choose quality bearings for fitness equipment?

Home trainers operate under repetitive motion, sweat exposure, vibration and long training sessions. High-grade bearings reduce noise, increase durability and improve the overall exercise experience. Machines equipped with premium bearings require less maintenance and operate with higher efficiency.

We supply bearings worldwide

We provide a wide selection of bearings suitable for all types of fitness equipment — from basic home models to professional gym machines. Products are available for worldwide delivery, and we can identify the correct replacement even if you only have an old or worn bearing in hand. Simply send us the bearing code, dimensions or a photo.

Need specific bearings for your trainer?

Tell us the bearing number, brand, dimensions or machine type, and we will offer suitable options along with delivery time and availability. We handle both small orders and bulk shipments for service centers and fitness equipment manufacturers worldwide.