When someone calls the parts counter and says, “I need a five-lug Knott hub,” my first question is, “What does the axle tag say?” I put this Knott sealed hub identification guide together so you know what to look for before you order.
Start With the Axle Tag
Look on the axle beam for the AutoFlex-Knott identification tag. Take a photo of the whole tag, including the Type, Serial Nr., and Load capacity fields. Then take a close-up of the hub and any markings you can see.
We photographed this tag on an EZ Loader 68BT trailer with 12″ wheels in our yard. That trailer is fitted with the smaller Knott hub, 250-033290.
Which Five-Lug Knott Hub Do I Need?
Both kits use a 5 on 4½″ wheel bolt pattern. Match the axle, spindle, and existing hub before you choose. The weight shown for each kit refers to its axle application.
- 250-033290 for the 1,560 lb axle application. This is the smaller hub shown on our 68BT yard trailer.
- 250-033291 for the 2,700 lb axle application. Check this kit for a compatible two-place PWC trailer with the matching AutoFlex-Knott torsion axle. The EZ Loader reference axle assembly is 300-033242-10.
Is It a Sealed Hub or an Oil Bath Hub?
A Knott sealed hub has a bearing sealed inside the assembly. An oil bath hub uses oil inside the hub and typically has a cap that lets you check the oil level. If you’re unsure which type you have, compare them in our EZ Loader Hub Identification Guide.
Already know you have a Knott sealed hub? See our Knott Hub Maintenance Guide for the annual Rock & Roll check and what to do if you find wheel play or hear grinding.
Send Us What You See
If the tag is hard to read, send us your trailer VIN, a wider picture of the axle, and a close-up of the hub. Email Parts@411Marine.com or call us at 843-683-5797. We answer the phone, and we’ll help you match the hub to your trailer.