LAMBDA Racing

ROAD BIKE GEOMETRY AERODYNAMICS SIMULATOR (switch to German version)

Dipl-Ing. Jan Smekal © 2026
www.lambda-racing.de

Live Analysis

Saddle Drop

-- cm

Reach (Saddle-Bar)

-- mm

Knee Angle

--°

Hip Angle

--°

Shoulder Angle

--°

Back Angle

--°

Knee over Pedal

-- cm

Weight Dist. (F/R)

--% / --%

Drag (CdA)

Power

-- W

Simulator works best on PC/Laptop.

Step 1: Enter Rider Anatomy (bottom).

Step 2: Enter Frame Geometry or Select Bike.

Step 3: Adjust settings and have fun.

Settings are saved on close.

Guidelines & Proportions

Target Saddle Height (0.883 x Inseam)

-- cm

Top Tube Length (Effective)

-- mm

Stack-to-Reach (STR) Frame

Thigh / Shin Ratio

Inseam / Height Ratio

Speed (for power calculation) 35 km/h

Road Gradient (careful, gets tough) 0 %

Environment & Rolling Resistance

Altitude (Meters) 0 m

Temperature (°C) 20°C

Tires

Surface

Air Density (Rho): 1.225

Crr Value: 0.0035

Riding Position

Crank Position 0° (Top)

Foot Angle 10°

Elbow Angle 130°

Affects Hoods/Tops position only

Handlebar Width (center-center) 38 cm

Affects power in Aero-Hood position only

HANDLEBAR TYPE / GRIP POSITION

Adjustments

Spacers (plus 5cm for headset/stem) 2.0 cm

Saddle Offset 0.0 cm

Stem Length 120 mm

Crank Length 170 mm

Bike Selection

Frame Type (Generic)

Lambda : Twin Force -- Road + Gravel

AVENGER : Everest -- Light Road

AVENGER : Gravel Speeder

AVENGER : Phantom II -- Track

Frame Geometry

Saddle Height (BB to Saddle Top) 73.1 cm

Seat Tube Angle 73.7°

Head Tube Angle 72°

Reach (Frame) 383 mm

Stack (Frame) 569 mm

Head Tube Length (Visual only) 157 mm

Rider Anatomy

Body Height 180 cm

Scales all limbs proportionally.

Inseam 82.8 cm

Scales legs proportionally.

Shoe Size (EU) 44

L: -- cm

Weight (Rider) 75 kg

Thigh 47.2 cm

Shin 42.2 cm

Torso Length 59.4 cm

Arm Length 58.3 cm

Torso

Arm

Leg

Foot

Frame

Head Tube

Knee-Plumb (KOPS)

Center of Gravity

Shadow

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