⚙️ Upgrade your ride with precision-engineered power!
This OEM Replacement Idler Pulley from Keiser Fitness features a high-quality 6203ZZ bearing and durable alloy steel construction. Designed specifically for Keiser M3 series indoor cycles and M5 Ellipticals, it ensures smooth belt tensioning and optimal friction resistance. Compact and reliable, it restores your machine’s performance to factory standards.
| Brand | Keiser Fitness |
| Color | Black |
| Power Source | Pedal-powered (non-electric) |
| Recommended Uses For Product | Indoor |
| Material | Metal |
| Resistance Mechanism | Friction |
| Product Dimensions | 2"D x 2"W x 0.77"H |
| Handle Material | Alloy Steel |
| Model Name | 555066 |
| Maximum Height | 147 Centimeters |
| Drive System | Belt |
| UPC | 798304369939 |
| Item Package Dimensions L x W x H | 3.03 x 2.6 x 1.14 inches |
| Package Weight | 0.09 Kilograms |
| Item Dimensions LxWxH | 2 x 2 x 0.77 inches |
| Brand Name | Keiser Fitness |
| Manufacturer | Keiser Fitness |
| Part Number | 555066 |
| Size | 6203ZZ |
F**K
Relatively cheap replacement part that's needed for keiser m3 bikes
If you start to notice an inconsistent pedal stroke and increased noise remove the plastic covers and check the idler tensioner pulley most likely it is cracked. My keiser m3 has 20,000 miles so it had a cracked pulley, chances are if you need a new pulley your bike also will need new bottom bracket crank bearings and a new belt so I would reccomend getting all three parts. But if you want to be cheap you could just replace the idler pulley since a new belt is $60 and new crank bearing and crank arm would be $90 something to consider
B**S
Kaiser idler pulley
Idler pulley arrived as expected. Fast service. I replaced my crack pulley so now my bike runs smooth and quiet
A**R
Exact fit.
Fixed my split old pulley and quieted down the bike. Smoother operation too. Very happy with this.
A**K
Great replacement
Plug and play
Trustpilot
1 week ago
2 months ago