Planet3 Installation Instructions

Step one:

To deal with a rather specific and very rare problem of bolt-head eccentricity during tightening; there has been an update to the sun gear design of the PLANET3 in May 2020 and all of the devices were updated to the same 3-bolt design.

The following video explains the differences and two ways to install it. We would recommend to place the sun gear on top first and then drive the 3 provided bolts through it. This will ensure it’s flat against the rotor. It is common mistake to leave it up in the air a bit at one of the bolt heads which can cause it to contact the ring gear during rotation.


Step two:

We would recommend to pay attention to the installation depth of the ring gear too.

During your installation we would highly recommend for you to perform the empty device test as outlined at the end of the previous video. If there is no scraping sounds of plastic on plastic – you’re good to go, your frame is not at risk, you have correctly gauged the installation depth of the ring gear and PLANET3 should never wear out.

Be aware to be careful in the last step too when you put the wheel back into the bike. You could hit the PLANET3 ring gear against the frame or sensor when you’re aiming the disc into the calipers. So we recommend to do everything really gently during all installation process.

Step three:

If you have selected a Hope Pro4 hub during your product configuration, you will receive a CNC machined replacement end cap that ensures compatibility with the PLANET3.

The replacement procedure is rather simple. The original should pull off just with fingers, but sometimes the o-ring that holds it in place can be a bit stuck on there. If that’s the case, you can either use a plastic rod (10 mm diameter) to punch it out from the other side by catching the edge or just wrap some leather or an old innertube around the end cap and use pliers. Just be careful not to damage it and don't use a cloth or something like that. The steel pliers will push the fibers aside and you might scratch it up. The replacement you would receive has the same o-ring and has been pre-greased and it should go on smoothly with a push of a thumb.