FONZASO

$0.00

BUILT AND PAINTED IN 7-8 WEEKS

Prologue Fonzaso Disc

Your forever all-road companion—custom-built in butted 3AL/2.5V titanium for riders 4’10″–6’11″ with geometry dialed to your exact fit.

Key Features

  • Material: 3AL/2.5V Butted Titanium
    Delivers a uniquely compliant ride that soaks up chatter on rough roads while staying snappy under power—perfect for both gravel adventures and paceline hammer sessions.

  • Lifetime Durability
    Titanium’s natural corrosion resistance and extraordinary fatigue life make the Fonzaso Disc “bomb-proof.” This frame is guaranteed to outlast every other bike in your garage.

  • Full Customization
    From seat-tube length to stack, reach, head-tube angle, and more, we tailor every dimension to your body and riding style—no off-the-shelf compromises.

  • Versatile Clearance
    Flat-mount disc brakes (160 mm rotor) plus generous tire clearance up to 700×38 mm let you run any tire withing the range to gain the desired control and comfort.

Why “Fonzaso”?

Named for the tranquil Italian village where Prologue’s founder perfected his craft alongside Sportful, the Fonzaso Disc embodies old-world road-riding soul and modern precision engineering—ready to be your lifelong ride, on every surface.

BUILT AND PAINTED IN 7-8 WEEKS

Prologue Fonzaso Disc

Your forever all-road companion—custom-built in butted 3AL/2.5V titanium for riders 4’10″–6’11″ with geometry dialed to your exact fit.

Key Features

  • Material: 3AL/2.5V Butted Titanium
    Delivers a uniquely compliant ride that soaks up chatter on rough roads while staying snappy under power—perfect for both gravel adventures and paceline hammer sessions.

  • Lifetime Durability
    Titanium’s natural corrosion resistance and extraordinary fatigue life make the Fonzaso Disc “bomb-proof.” This frame is guaranteed to outlast every other bike in your garage.

  • Full Customization
    From seat-tube length to stack, reach, head-tube angle, and more, we tailor every dimension to your body and riding style—no off-the-shelf compromises.

  • Versatile Clearance
    Flat-mount disc brakes (160 mm rotor) plus generous tire clearance up to 700×38 mm let you run any tire withing the range to gain the desired control and comfort.

Why “Fonzaso”?

Named for the tranquil Italian village where Prologue’s founder perfected his craft alongside Sportful, the Fonzaso Disc embodies old-world road-riding soul and modern precision engineering—ready to be your lifelong ride, on every surface.

FRAME DESIGN

  • Head-tube angles from 71.5° to 73.5° combined with a constant 410 mm chainstay yield confident tracking on rough dirt or chipseal without any sluggishness in fast corners.

  • Steeper seat-tube angles (73–74°) keep you centered over the pedals—ideal for climbing and sprinting, yet still comfortable for long miles.

  • Reach grows only ~5 mm per size and stack by ~25 mm—so each size feels like the same bike proportionally, avoiding big jumps in bar position or cockpit length.

  • Wheelbase only increases ~10 mm per size, ensuring larger frames remain as quick and agile as the small ones.

Road Bicycle frame design