Upgrading Campagnolo Zonda Front/Rear Hubs to USB
04-21-24, 12:03 PM
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Upgrading Campagnolo Zonda Front/Rear Hubs to USB
My Wheelset: Campagnolo Zonda C17 Clincher purchased in April 2022
Plan to replace the steel bearings in both hubs with USB ceramic bearings.
Was told there are dedicated kits for front and rear hubs. Each kit comes with a full set of caged bearings, seals, cones and cups.
And that both kits below will work on a Zonda C17 clincher with rim brakes. Can anyone confirm?
1. USB HB-SH100 (Rear Hub)
2. USB HB-SH200 (Front Hub)
Does anyone know the axle diameter (mm) of the Zonda front and rear hubs? Are both same or different?
Also, both the rear and front bearings in Zonda have 15 beads...is that correct?
Plan to replace the steel bearings in both hubs with USB ceramic bearings.
Was told there are dedicated kits for front and rear hubs. Each kit comes with a full set of caged bearings, seals, cones and cups.
And that both kits below will work on a Zonda C17 clincher with rim brakes. Can anyone confirm?
1. USB HB-SH100 (Rear Hub)
2. USB HB-SH200 (Front Hub)
Does anyone know the axle diameter (mm) of the Zonda front and rear hubs? Are both same or different?
Also, both the rear and front bearings in Zonda have 15 beads...is that correct?
Last edited by Fidler; 04-21-24 at 12:20 PM.
04-22-24, 06:01 AM
#2
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Yes, you can use those two kits to do the upgrade that you want to do.
A couple of things to be aware of:
1. Important - the front hub does not dismantle the same as older Campagnolo front hubs of similar - but older - design. Please see the video here:
https://support.campagnolo.com/UK/en...al_ultra_mille
2. When extracting the bearing surfaces, you will need two different tools for front and rear because the bearing surfaces are different diameters, 28mm in the front, 30mm in the back. The tools to use are from Cyclus, 720112 & 720882. There is an tool part number error on the Cyclus website.
3. When pressing the new bearing surfaces in, the press tool from Cyclus now includes drifts for both the 28mm OD surfaces, and the 30mm. Part numbers is Cyclus 720113.
I would strongly advise using the correct tools. Whilst there are "workarounds", the hub shells cannot be replaced as spare parts and having them repaired if bearing surface removal or refitting damages them is expensive and not always possible (at Velotech we have done this for shops who have tried to cut corners on the tools, several times). "Walking" the bearing surfaces out and knocking them back in with a hammer and drift both have a high potential to damage the hub shell.
A couple of things to be aware of:
1. Important - the front hub does not dismantle the same as older Campagnolo front hubs of similar - but older - design. Please see the video here:
https://support.campagnolo.com/UK/en...al_ultra_mille
2. When extracting the bearing surfaces, you will need two different tools for front and rear because the bearing surfaces are different diameters, 28mm in the front, 30mm in the back. The tools to use are from Cyclus, 720112 & 720882. There is an tool part number error on the Cyclus website.
3. When pressing the new bearing surfaces in, the press tool from Cyclus now includes drifts for both the 28mm OD surfaces, and the 30mm. Part numbers is Cyclus 720113.
I would strongly advise using the correct tools. Whilst there are "workarounds", the hub shells cannot be replaced as spare parts and having them repaired if bearing surface removal or refitting damages them is expensive and not always possible (at Velotech we have done this for shops who have tried to cut corners on the tools, several times). "Walking" the bearing surfaces out and knocking them back in with a hammer and drift both have a high potential to damage the hub shell.
04-23-24, 11:05 AM
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gfk_velo your help and professional expertise is greatly appreciated. Thanks!
If I wanted to upgrade to the CULT bearings, would these be the Kits I should purchase?
They will be 100% compatible?
These are still for the Zonda C17 Clincher from 2022.
1. HB-HY100 (Rear Hub) – CULT
2. HB-BO100 (Front Hub) – CULT
If I wanted to upgrade to the CULT bearings, would these be the Kits I should purchase?
They will be 100% compatible?
These are still for the Zonda C17 Clincher from 2022.
1. HB-HY100 (Rear Hub) – CULT
2. HB-BO100 (Front Hub) – CULT
Last edited by Fidler; 04-23-24 at 12:07 PM.
