MADISON FULL BLACK HUB SET

Hub set for track, fixed gear and singlespeed bicycles, designed and manufactured by Mazastrabocchi.

The Madison hubs are machined through multiple processes from solid round bars of 6061 aluminum (not forged), ensuring dimensional accuracy, structural strength and long-term durability.

The full black finish is achieved through anodizing (not paint), an electrochemical treatment that hardens the aluminum surface, improves wear and corrosion resistance, and preserves color stability over time without altering machining tolerances.

The bearing system uses 6000ZZ low-friction sealed ball bearings, providing smooth, stable rotation with minimal internal resistance, contributing to mechanical efficiency and extended service life.

The rear hub features a fixed / track / flip-flop / singlespeed system, allowing the use of fixed cog or freewheel, depending on the selected configuration.

Adjustment Type

Fixing system: hex nut

Nut size: 15 mm

Nut material: SAE 1045 steel

Surface treatment: chrome-plated

Additional component: floating washer

System compatible with track and fixed gear frames with horizontal dropouts.

Technical Specifications

Front Hub

Flange diameter: 70 mm

Over locknut dimension (OLD): 100 mm

Rear Hub

Flange diameter: 70 mm

Over locknut dimension (OLD): 120 mm

Rear Hub Threads and Compatibility

Freewheel thread: 35 mm × 24 TPI

Fixed cog thread: 35 mm (1.375" × 24 TPI)

Freewheel thread (14T or 15T): 30 mm × 26 TPI

Lockring thread / chainline: ISO left-hand thread, 33 mm (1.299")

Bearings

6000ZZ sealed low-friction ball bearings (front and rear)

Materials

Hub shell: 6061 aluminum

Axle: Siemens Martin steel

Bearing covers: 6061 aluminum

Knurled locknut: AISI 304 stainless steel

Lockring: AISI 304 stainless steel

Weight

Front hub: 240 g

Rear hub fixed–fixed: 330 g

Rear hub fixed–free: 320 g

Rear hub free–free (15T): 310 g

Load Limit

Maximum combined weight (rider + bicycle): 120 kg