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- Front hub
- Shimano HB-6600 "Ultegra"
- Small-flange
- Aluminum
- Sealed mechanism
- 100mm hub width
- With skewer
- Standard drilling
- Borozon treated cone races with stainless steel ball bearings
- Hollow steel axles with larger hub shell cross section
- Steel freehub body that is 8-10 speed compatible
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