2017 Soma Fabrications b-side Base

	16.5"	18.5"
Stack	584mm	589mm
Reach	400mm	415mm
Stack to Reach Ratio	1.46:1	1.42:1
Seat Tube Length, C-T	420mm	470mm
Top Tube Length, Effective/Horizontal Center	589mm	604mm
Top Tube Slope	19.2deg	14.2deg
Head Tube Angle	68deg	68deg
Seat Tube Angle	72deg	72deg
Head Tube Length	110mm	115mm
Bottom Bracket Drop	39mm	39mm
Bottom Bracket Height	316.5mm	316.5mm
Chainstay Length	427mm	427mm
Chainstay Length Horizontal	425.2mm	425.2mm
Front-Center	666mm	681mm
Front-Center Horizontal	656.8mm	671.8mm
Wheelbase	1082mm	1097mm
Fork Offset/Rake	42mm	42mm
Trail	98.3mm very high	98.3mm very high
Mechanical Trail	91.2mm	91.2mm
Wheel Flop	34.2mm	34.2mm
Standover Height	787.4mm	802.6mm
Tire to Pedal Spindle	140.5mm 170 mm cranks	155.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	146.5mm 170 mm cranks	146.5mm 170 mm cranks

	16.5"	18.5"
Wheel Size	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD
Tire Width	2.5in	2.5in
Tire Width Max	2.9in	2.8in
Tire Outer Diameter	711mm	711mm
Bike Length with Tires	1793mm	1808mm

Published Sizing Recommendations

Height

5 ft 5 in

6 ft 0 in

—

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

Full-suspension Cross-country MTB

Source:https://www.somafab.com/archives/product/b-side-v-3-27-5-650b, https://www.somafab.com/wp-content/uploads/2011/06/soma_geochart_bside_2017_1.jpg

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2017 Soma Fabrications b-side Base

Geometry

Base Build

Published Sizing Recommendations

Stack and Reach vs. Category Trend