Ferrum Bikes Owner's Use & Care Guide

Ferrum Owners will find this guide extremely useful for preserving the life, warranty and value of their frame. We spend many hours building and assembling each frame to meticulous standards, once your frame is delivered, the care and maintenance is the sole responsibility of you, the owner of the frame.

We highly recommend washing only with a microfiber towel and automobile detailer/waterless wash spray. Spray on, let it sit and penetrate for ~2 minutes, then wipe off with your soft microfiber towel. This method is the most eco friendly and will keep your bike looking amazing for many years if done properly.

All Ferrum frames are protected with a military grade internal rust protection film. The film is not rated for prolonged water retention from negligence. *Do Not Allow Water to Enter the the Internal Dropper Seat Post Routing Hole*. The initial treatment film is designed to withstand incidental condensation from riding possible wet areas and humid climates.

Please respect Earth’s finite resources such as fresh water and don’t just blast your frame with a water hose! If you insist on cleaning your frame with a water hose, don’t allow water to enter the internal dropper hole area or plug the hole with RTV sealer/towel/ etc.


Every bike requires maintenance. Your Ferrum mountain bike frame is no different. Your frame is treated to prevent rust during final assembly but your frame requires maintenance of this protection and to retain your warranty.

Before every season, apply a rust preventative coating to the frame through the purge/vent/breather holes in the frame tubes. We highly recommend the “Pro Gold Steel Frame Saver” as recommended by other popular steel frame manufacturers/builders. We have tested this product and abused it, it’s performed flawlessly.

REMINDER: Your internal dropper routing hole shall is a vent to allow the frame to breathe. Do not allow water to enter this hole. If very little enters, this is fine but anything more than ~3ml will require seat post and BB removal for drying and evaporation.

Ferrum Full Suspension Chromoly Steel Mountain Bike Frames from 2018-2020 (LV/MV/NV) use 4 pivot bearings. The bearings are #6001 and can be purchased from most any local hardware store or online. They are very slight interferance fit and retained via side clamping force from the pivot axle. They must also be locked in their cups with Loctite 635/638 or Vibra-Tite 541 retaining compound.

To remove the bearings use a hair dryer (heat guns are too hot) to warm up the assembly and a drift to tap them out. Re-apply the recommended retaining compound to the bearing outer race surfaces, assemble in reverse of disassembly and let it set 24-48 hours before riding for curing.

  • Rear Axle: Per axle manufacturer specs usually etched on the axle.
  • Derailleur Hangers: Full Suspension  16 ft-lbs. with medium strength thread locker. Hardtail  17-nm with medium strength thread locker.
  • Pivot Axle: 19 ft-lbs. with medium strength thread locker

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