Information

NOTE: We have discontinued Trials freewheels as of 9/4/2024.  We will sell off the remaining Trials outer gears until they are gone.  We will not be making more Trails outer gears. We no longer use the thicker outer gear case that was a feature on Trials freewheels as we deemed it an unnecessary cost and weight.  The standard outer gears are tough enough!

When we designed our freewheels we intentionally made them rebuildable rather than disposable.  If you ride a lot, eventually you are going to need a new outer gear.  We recommend replacing your chain when replacing your outer gear because worn out chains don’t usually work well with new outer gears.  Please read all the information below to make sure you choose the correct replacement gear for your freewheel.

Specs

• • Made from electroless nickel-plated 8620 case-hardened steel
  • Comes with an Enduro chromium steel bearing installed
  • ENO single and DOS ENO freewheels feature 10 degree/36 points of engagement or 5 degree/72 points of engagement
  • Bearings are ABEC 3 or 5 grade depending on freewheel type, are made from chromium steel, and use a special Mobil XHP222 extra high pressure grease
  • It’s a good idea to also purchase a new seal and O-ring when replacing your outer gear (Freewheel Seals Page)

• All freewheels can use either 3/32” or ⅛” chains except ENO 16T single and all DOS ENO freewheels which require a 3/32″ chains
• We no longer use the thicker outer gear case that was a feature on Trials freewheels as we deemed it an unnecessary cost and weight.  The standard outer gears are tough enough!
• 16/19 DOS freewheels discontinued on 3/10/2022
• 23T freewheels discontinued on 3/10/2022
• Trials freewheels discontinued 9/4/2024

Compatibility

If you are replacing your outer freewheel gear with the same model and number of teeth you currently have, just choose the matching part from the dropdown menu.  Easy!  If you are wanting to swap your current outer gear to a different model and/or number of teeth, keep reading…. 

As you can see from the chart below, all ENO single and DOS ENO double freewheels use the same “diver”.  That means all the outer gears used on both those models are interchangeable.  But note that if you swap to an outer gear with a different number of teeth, you may have to also replace your lockring with one that is compatible with your new outer gear.  Basically, if you’re changing to or from an outer gear with 16 teeth, you’ll need a new lockring.   Those are available under Parts>Freewheel Parts>Freewheel Lockrings.

Trials freewheels use a different driver and a thicker outer gear than the other models, and each of the three outer gears are interchangeable.

Technical Documents

• Freewheel Disassembly