intro

When your Profile cranks or hubs are assembled here at the factory, we use bearing presses and tools made specifically for the part they are used on. Obviously, very few people are going to have these tools in their homes, and not many shops will have them either, so if you need new bearings, your options are limited. Your best option is to send your hub(s) in to use and let us rebuild them. We charge very fair prices and have a pretty fast turnaround time. The next best is to take them to a bike shop that has mechanics that are familiar with working on Profile products. If you insist on performing the service yourself, and I know that many of you will, we provide these instructions to you.

The instructions on the following pages aren't guaranteed, and they aren't the best way to install bearings that exists, but they are, in our opinion, the best way for someone who doesn't have access to a bearing press to service our products. They are better by a long shot than using a hammer and a piece of wood to bash bearings back into your hubshells. (Don't ever use a hammer and a piece of wood to bash any sealed bearing into any bicycle part. Trust me.)

Below is the story of how a Mini Cassette Hub is born from it's individual components.

how we build our hubs

click to enlarge

BMX Mini Cassette Hub

• a. non-drive locknut (1)
• b. non-drive cone spacer (1)
• c. driver o-ring (1)
• d. hub bearings ( #6903) (2)
• e. driver bearings (#6802) (4)
• f. driver spacer (1)
• g. springs (4)
• h. pawls (4)
• i. driver (1)
• j. drive-side locknut (1)
• k. 14mm axle (1)
• l. hub body (1)
• m. ratchet ring (1)

Apply thread lock (permanent) to the hubshell.
Tighten Ratchet Ring into hubshell.
Press Non-Drive bearing into hubshell.
Slide axle through non-drive side bearing.
Press in drive side hub body bearing. Non-drive side bearing is fully seated during this step as well.
Slide the driver spacer on.
Slide the non-drive side cone spacer on.
Press 2 bearings into the back side of the driver.
Insert driver bearing spacer, press 2 bearings into front side of driver
Put o-ring into o-ring channel.
Insert pawls and springs into driver.
Slide driver onto axle. Rotate backwards from drive direction to fully insert into ratchet ring.
Tighten down drive side locknut. Apply blue (semi-permanent) thread lock to final threads
Tighten down non-drive side lock nut, apply blue (semi-permanent) thread lock to the final threads
That's it. One complete Mini Hub.

DISCLAIMER: These instructions are provided as a service. The best way to install sealed bearings is always a bearing or arbor press. The methods discussed here are alternatives for the home bike mechanics with home bicycle tools. If you are not careful, you will damage your hubs and bearings. Profile cannot be held responsible for any damage caused by attempts at repair attempted by anyone other than employees of Profile racing.

If you are unsure of your abilities, take your bike to a local bike shop, or contact us at Profile. We are happy to overhaul your hubs for you here. Contact Shane at Profile at 727.391.7370 for details.