2025 Slug Bicycles Earthling Base

	50	52	54	56	58	60	62
Stack	537mm	556mm	570mm	589mm	608mm	636mm	666mm
Reach	369mm	374mm	389mm	401mm	414mm	426mm	434mm
Stack to Reach Ratio	1.46:1	1.49:1	1.47:1	1.47:1	1.47:1	1.49:1	1.53:1
Seat Tube Length, C-T	470mm	495mm	515mm	540mm	560mm	580mm	600mm
Top Tube Length, Effective/Horizontal Center	525mm	535mm	554mm	572mm	590mm	608mm	626mm
Top Tube Slope	9.7deg	8.9deg	8deg	7.3deg	7deg	7.6deg	8.5deg
Head Tube Angle	71deg	71deg	71deg	71deg	71deg	71deg	71deg
Seat Tube Angle	74deg	74deg	74deg	74deg	74deg	74deg	74deg
Head Tube Length	100mm	120mm	135mm	155mm	175mm	205mm	235mm
Bottom Bracket Drop	74mm	74mm	74mm	74mm	74mm	74mm	74mm
Bottom Bracket Height	290.3mm	290.3mm	290.3mm	290.3mm	290.3mm	290.3mm	290.3mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	428.7mm	428.7mm	428.7mm	428.7mm	428.7mm	428.7mm	428.7mm
Front-Center	586mm	596.9mm	616.8mm	635.7mm	655.5mm	676.4mm	694.3mm
Front-Center Horizontal	581.3mm	592.3mm	612.3mm	631.3mm	651.3mm	672.3mm	690.3mm
Wheelbase	1010mm	1021mm	1041mm	1060mm	1080mm	1101mm	1119mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm	50mm	50mm
Fork Length (Axle-To-Crown)	395mm	395mm	395mm	395mm	395mm	395mm	395mm
Trail	72.6mm high	72.6mm high	72.6mm high	72.6mm high	72.6mm high	72.6mm high	72.6mm high
Mechanical Trail	68.6mm	68.6mm	68.6mm	68.6mm	68.6mm	68.6mm	68.6mm
Wheel Flop	22.3mm	22.3mm	22.3mm	22.3mm	22.3mm	22.3mm	22.3mm
Standover Height	719mm	743mm	768mm	792mm	811mm	825mm	844mm
Tire to Pedal Spindle	51.7mm 170 mm cranks	62.6mm 170 mm cranks	82.5mm 170 mm cranks	101.3mm 170 mm cranks	121.2mm 170 mm cranks	142.1mm 170 mm cranks	160mm 170 mm cranks
Pedal Spindle to Ground Clearance	120.3mm 170 mm cranks	120.3mm 170 mm cranks	120.3mm 170 mm cranks	120.3mm 170 mm cranks	120.3mm 170 mm cranks	120.3mm 170 mm cranks	120.3mm 170 mm cranks

	50	52	54	56	58	60	62
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	2.1in	2.1in	2.1in	2.1in	2.1in	2.1in	2.1in
Tire Outer Diameter	728.7mm	728.7mm	728.7mm	728.7mm	728.7mm	728.7mm	728.7mm
Bike Length with Tires	1738.7mm	1749.7mm	1769.7mm	1788.7mm	1808.7mm	1829.7mm	1847.7mm

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale

Category Trend

All-road/Gravel

Source:https://slugbicycles.com/products/earthling-dirt-bike

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2025 Slug Bicycles Earthling Base

Geometry

Base Build

Stack and Reach vs. Category Trend