Mafiabikes Chonky 27.5” wheelie bike, stable and responsive setup for balance tricks and everyday riding

Mafiabikes Chonky 27.5” key features

• Rider height: approx. 155 cm and above
• Frame: 23.8"
• Handlebar: 6” rise, 30” width
• Use: wheelies, pumptrack, everyday riding
• Level: beginner to intermediate

The Chonky 27.5” is built for riders who want balance, control and a bike that feels stable from the first ride. The geometry has been designed to make learning wheelies easier and more predictable.

It’s a different kind of ride. Bigger wheels, comfortable position and a setup that helps you stay in control when you’re on one wheel.

Why this bike stands out

The frame uses hydroformed tubing and reinforced areas where it matters most. This gives you strength without unnecessary weight.

The 4130 Cr-Mo fork adds durability, while wide rims and tyres improve grip and stability.

Built for balance and control

The geometry is tuned for wheelie riding. It helps you find the balance point faster and hold it longer.

At the same time, the bike remains comfortable for everyday riding thanks to its upright position and larger wheels.

What to keep in mind

• larger wheels improve comfort and stability
• geometry supports balance-based riding
• adjustable seat and handlebar position
• suitable for a wide range of rider heights

Safety matters, a helmet and protective gear are strongly recommended, especially when learning wheelies.

Technical specification

Frame

• 6061 T6 aluminium
• TT: 23.8"
• CS: 17.4"
• HA: 70°
• SA: 72°
• BB: -61 mm
• SO: 16.7"
• Twin-tube top tube
• CNC machined head tube
• forged rear triangle connection
• tapered rear stays

Handlebar

• Rise: 6"
• Width: 30"
• 1020 Hi-Ten steel

Fork

• 4130 Cr-Mo
• Tapered legs
• Offset: 22 mm
• Peg compatible

Stem

• Mafiabikes
• Aluminium
• Top load
• Forged

Rims

• 27.5"
• Aluminium
• Double wall

Tyres

• Vee Speedster
• 27.5" x 3.0"

Headset

• Integrated
• Sealed bearings

Crankset

• Samox
• Aluminium
• Hollow spindle
• 170 mm

Sprocket

• 25T
• CNC aluminium
• Direct mount

Front hub

• Cr-Mo axle 10 mm (3/8")
• Sealed bearings
• 36H

Rear hub

• Cassette
• Cr-Mo axle 10 mm (3/8")
• Driver: 12T
• Sealed bearings
• 36H

Brake

• Zoom
• Hydraulic disc

Seat and seatpost

• Mafia Suede seat
• Adjustable seatpost

Pedals

• Mafiabikes
• Nylon
• 9/16"

Grips

• Lucky 6

Bottom bracket

• ISO Samox
• Sealed bearings

This bike is exposed to high loads during riding. Check it regularly and service it to keep it safe and extend its lifespan.

Important before your first ride

• bike is delivered approx. 90% assembled
• install pedals, handlebar and seat before riding
• front wheel installation may be required
• initial service at a professional bike shop is required to maintain warranty
• keep proof of service for warranty claims