CeramicSpeed 61903 (6903) Bearing 17x30x7mm

All CeramicSpeed Bearings are hand-built in Denmark. Super smooth CeramicSpeed grade 3 Silicon Nitride balls are matched (within microns) with hardened steel raceways that feature an ultra-smooth polished groove.

The balls are held in place by a reinforced polyamide cage. Every bearing is optimised with a low viscosity CeramicSpeed “Blue Grease” to minimise fiction and increase bearing life. Non-contact seals complete the bearings, keeping dirt and moisture out. CeramicSpeed Bearings can be used for any cycling discipline: Road, TT, Tri, Track, Cross and MTB. The benefits are super low friction, better power transfer and increased bearing life.

During the building process, we check each bearing four times by hand to ensure that all parts are matched perfectly. CeramicSpeed Balls are 400% smoother, 128% harder and 58% lighter than standard steel bearings normally used in the bicycle industry. When comparing the CeramicSpeed Balls with other ceramic balls in the industry, you will find that the CeramicSpeed Balls are 15% harder, take 99% higher loads and are 100% smoother.

Inner Diameter: 17 mm
Outer Diameter: 30 mm
Width: 7 mm

For:
– Mavic Cosmic Pro Carbon (CC SL) 2016
– Knight Aivee hubs
– Corima S / S+ models from 2015
– AX-lightness Road ULTRA
– Zipp 2013 & forward road rear discs (Black 11s hub)
– Zipp 2013 & forward road rear discs + 88/404/808/etc. front
– Zipp NSW (NOT DISC) Before mid 2018 (1st gen)
– Reynolds Aero Disc Brake (Aero 46/65/80 DB) – 2018 models
– Reynolds Aero Rim Brake (Aero 65/80 RB) – 2018 models
– Vision Metron 40-55-81-Disc, Trimax T30-T35-T42, Trimax Carbon TC24-TC50
– Tune Road MIG70, MAG170, MIG45, MAG150
– Industry Nine Torch Road rim brake & 6-Bolt disc (classic & modern)
– Industry Nine Torch Road centerlock disc (classic & modern)
– Mavic Crossmax SLR 650B Lefty SMU 2014
– Mavic Crossmax ST 29 Lefty 2014
– Mavic Crossroc 29 WTS Lefty 2014
– Mavic Crossroc 29 WTS Lefty Supermax 2014
– Mavic Crossroc WTS 650B (27,5) Lefty Supermax 2014
– Mavic CROSSMAX SLR 29 LEFTY 2013
– Cannondale CZero SL Carbon 2017
– Mavic Crossmax SLR 650B (27,5) Center-lock (DCL) 2014
– Mavic CROSSMAX SLR 29 Center-Lock 2013
– Mavic Deemax DH 2018
– Mavic Crossmax XL Pro (Crossmax XL) 2016
– Mavic Crossride Tubeless (Crossroc / Crossroc XL) 2016
– Mavic Crossride Light (Crossride) 2016
– Mavic Crossride / Crossride “FTS-X” (Crossone) 2016
– Mavic Crossmax XL 2015
– Mavic Crossroc XL 2015
– Mavic Crossmax Enduro 2014
– Mavic Crossmax Enduro 650B 2014
– Mavic CROSSMAX ST 29 2013
– Mavic CROSSMAX ST 29 Center-Lock 2013
– Mavic Cosmic Elite UST Disc 2018
– Mavic Ksyrium Disc 12/12 2018
– Mavic Aksium Allroad disc 12/12 2018
– Mavic E-XA Elite 27+ 2018
– Mavic E-XA Elite 2018
– Mavic Crossmax Pro Carbon 2018
– Mavic Crossmax Pro 2018
– Mavic Crossmax Elite 2018
– Mavic Crossmax Light 2018
– Mavic Crossmax 2018
– Mavic XA Pro 2018
– Mavic XA Elite 27+ 2018
– Mavic XA Elite 2018
– Mavic XA Light 2018
– Mavic XA 2018
– Mavic Crossride 2018
– Mavic Deemax Pro 2018
– Mavic Crossmax Pro Carbon 2017
– Mavic Crossmax Pro 2017
– Mavic Crossmax Elite 2017
– Mavic Crossride Tubeless Pulse 2017
– Mavic XA Pro Carbon 2017
– Mavic XA Elite 2017
– Mavic Crossride Tubeless Quest 2017
– Mavic Crossride Light WTS 2017
– Mavic Crossride 2017
– Mavic Deemax Pro 2017
– Mavic Crossmax SL Pro (Crossmax SL) 2016
– Mavic Aksium One Disc 2015
– Mavic Crossmax SL 2015
– Mavic Crossmax SLR 650B 2014
– Mavic Crossroc 29 WTS 2014 2014
– Mavic Crossroc 650B WTS 2014
– Mavic Crossroc WTS 2014
– Mavic Crossride 650B 2014
– Mavic CROSSMAX SLR 29 2013
– Mavic CROSSTRAIL 2013
– Mavic CROSSRIDE DISC 29 2013
– Mavic CROSSRIDE DISC 15/12 mm 2013
– Zipp 2014 & forward (188 v9 rear / 88 front hubs)
– Zipp 2015 & forward (77/177 hubs) + Mid 2018 & forward NSW Rim Brake
– SRAM SRAM road wheels
– 3T Orbis II, Discus, Discus Plus
– Cannondale Hollowgram Disc
– Mavic E-Deemax Pro 2018
– Zipp 2015 & forward (77/177 hubs) disc brakes & NSW Disc

The bearing is suitable for many other models!

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