This upgrade kit for the hubs of Zipp wheels includes two ceramic bearings of type 61803, which are compatible with numerous Zipp freehubs and a few front hubs. Ceramic balls made of silicon nitride, bearing races made of chrome-molybdenum-nickel steel, polyamide cages as well as non-contact seals ensure improved function, longer durability and lower friction.
Specifications:
- Dimensions (Inner x Outer x Width):
- 17 mm x 26 mm x 5 mm
- Designation:
- 61803 (6803)
Technical Information:
- Design:
- deep groove ball bearings
- Recommended Use:
- hubs
- Inner Race Material:
- stainless steel (chrome-molybdenum-nickel)
- Outer Race Material:
- stainless steel (chrome-molybdenum-nickel)
- Ball Material:
- Ceramic (Si3N4)
Compatibility:
- Cognition front hubs
- 76 front hubs
- 77 front hubs
- Cognition Gen2 freehubs
- Cognition Disc freehubs
- Cognition Disc V2 freehubs
- ZR1 freehubs
- ZR1 Disc freehubs
- ZM2 freehubs
- 176 freehubs
- 176 Disc freehubs
- 177 freehubs
- 177 Disc freehubs
Features:
- ideal upgrade for Zipp wheels or hubs, reduces friction and breakaway torque
- silicon nitride ceramic ball bearings for higher durability
- corrosion-resistant bearing races made of a hardened stainless steel super-alloy on a chrome-molybdenum-nickel basis
- polyamide ball bearing cages for vibration damping and insulation, improved function and durability
- contact-free seals possible thanks to high strength
- manufactured in Germany by a medical device specialist
Note from the manufacturer:
To upgrade a whole wheelset you need three kits (six bearings): two kits (4 pieces) with
61903 bearings for the front and rear hub shells and one kit (two bearings) with 61803 bearings for the freehub body.
Manufacturer Number:
11.2018.067.001
Contents:
Zipp Upgrade Kit, consisting of:
- 2 x 61803 ceramic bearings (17 mm x 26 mm x 5 mm)