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Kicker Calculator

Set ramp shape and lumber options to get a build diagram and cut list.

Ramp configuration

Units

Ramp shape

Height
cm

Vertical distance to the lip

Lip angle
°
Flat lip
cm

Structure

Width
cm

Surface width — 4 ft (122 cm) is typical

Side depth
cm

Radial depth of curved side panels

Surface

2×4 boards run across the width, stacked along the surface

Board gap
cm

Distance between 2×4 edges · pitch 9.9 cm

Results

Overlays
45°radius 4.10 m1.20 m1.22 mboard gap 1.0 cm2.90 mside depth 30.5 cm

Scale reference

Bike
Rider height
cm
Show bike on ramp

1.70 m end-to-end

Side elevation45°radius 4.10 m1.20 m2.90 mside depth 30.5 cm1.85 m26″ wheel66.0 cm

Radius 4.10 m is mellower than the typical 8–13 ft (2.4–4.0 m) window for this bike — expect a softer take-off.

Cut list

Side cutouts

One side: A + B

depth 30.5 cmradius 4.10 m
A1.61 mB1.61 m

Curved side supports

30.5 cm deep · arc 1.61 m · blank 1.72 m × 38.4 cm

4×8 ft plywood (¾″)

Qty
×4
total
Per side
×2
2 sections
Stock
2 sheets
Yield
3/sheet
123

Support connector plate

30.0 cm × 30.5 cm

4×8 ft plywood (¾″)

Qty
×2
Stock
1 sheet
Yield
24/sheet
12

Riding surface

1.22 m ramp width

8 ft 2×4

Qty
×32
Stock
16 sticks
Yield
2/stick
12