Have been using it as a commuter for 6 months, bought second hand, great bike, fast ans light for commuting, have some scratches on the paint but nothing that affect the structure of the frame, no cracks no bends, structure sound.
Suppose you can change the wheels for a 26' and go mountain bike, never tried to do it.
After I bought I have change a lot of the parts upgrading the bike, this frame still the ones handmade in USA.
Specs:
Frame: Cannondale Badboy Ultra (Mat Black) size L
Fork: Headshock Ultra 80mm
Brakeset: Hope Hidraulic 180mm rear / 203 mm front – Used, but still life left on the pads, Front on the right, Rear on the Left,
Shift Levers : SRAM X-7 Trigger – Changed 6 months of use
Front Derailleur : Shimano Deore
Rear Derailleur : SRAM X-7 - Changed 6 months of use
Crankset: FSA Fire MegaExo, 22/32/48 teeth
Pedals: Have the old cannondale ones, but on the bike Crank Brothers Candy Black Body/ Orange Spring
Rear Cogs : 9-speed, 11 - 34 teeth – Ultegra – changed 6 months of use
Chain: Shimano SLX - Changed 6 months of use
Saddle: Selle Royal Viper
Handlebar: Eason E30 – Changed 6 months of use
Headset : Cannondale HeadShok Si
Wheels: Mavic Front and rear
Hubs: Cannondale Fire Disc Front / Shimano XT back
Tires: 700 x 32 Continental Cityride 200km on then
Extras: Have a rear carrier, disk specific in silver installed, and a Altura Drybag that will go with the bike, ready to start commuting.
Price: € 450.00
Same as this:

Suppose you can change the wheels for a 26' and go mountain bike, never tried to do it.
After I bought I have change a lot of the parts upgrading the bike, this frame still the ones handmade in USA.
Specs:
Frame: Cannondale Badboy Ultra (Mat Black) size L
Fork: Headshock Ultra 80mm
Brakeset: Hope Hidraulic 180mm rear / 203 mm front – Used, but still life left on the pads, Front on the right, Rear on the Left,
Shift Levers : SRAM X-7 Trigger – Changed 6 months of use
Front Derailleur : Shimano Deore
Rear Derailleur : SRAM X-7 - Changed 6 months of use
Crankset: FSA Fire MegaExo, 22/32/48 teeth
Pedals: Have the old cannondale ones, but on the bike Crank Brothers Candy Black Body/ Orange Spring
Rear Cogs : 9-speed, 11 - 34 teeth – Ultegra – changed 6 months of use
Chain: Shimano SLX - Changed 6 months of use
Saddle: Selle Royal Viper
Handlebar: Eason E30 – Changed 6 months of use
Headset : Cannondale HeadShok Si
Wheels: Mavic Front and rear
Hubs: Cannondale Fire Disc Front / Shimano XT back
Tires: 700 x 32 Continental Cityride 200km on then
Extras: Have a rear carrier, disk specific in silver installed, and a Altura Drybag that will go with the bike, ready to start commuting.
Price: € 450.00
Same as this:
