Starting with a driver made from heat treated 4130 steel that houses 3 heat treated S7 tool steel pawls (6 on the Trials model), we add an 8620 steel case-hardened and electroless nickel-plated outer gear turning on an Enduro chromium steel bearing. We basically designed all the weak links out of the system. And because everything wears out eventually, we designed them to be rebuildable.
ENO single and DOS ENO double freewheels feature 36 points of engagement while the Trials freewheels utilize a thicker outer gear (the base, not the teeth) and 72 points of engagement.
Our freewheel 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.
Note: All freewheels can use either 3/32” or ⅛” chains except 16T ENO single and all DOS ENO double freewheels (see FAQ below)
Specs
- Threads: 1.375” x 24TPI
- ENO single and DOS ENO double freewheels have 3 pawls and 36 points of engagement
- Trials freewheels have 6 pawls and 72 points of engagement
- Lockring colors:
- Blue: 16T single, 16/18 DOS and 16/19 DOS
- Red: 17T-23T single
- Green: Trials 18T, 20T, 22T
- Freewheel measurements for chainline calculations:
- All freewheels are 18.4mm wide
- On ENO single freewheels (standard and Trials) center of teeth are 9mm from the inner base of the threads
- On ENO DOS double freewheels inside teeth are 6.1mm from the inner base of the threads and the outside teeth are 11.8mm from the base. Teeth are 5.7mm apart center to center