Zipp Ceramic Bearing Upgrade Kit 61803 for Freehubs

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)