2024 Soma Fabrications Riff 2.0 Base

	XS	SM	MD	LG
Stack	603mm	613mm	622mm	626mm
Reach	390mm	410mm	430mm	453mm
Stack to Reach Ratio	1.55:1	1.5:1	1.45:1	1.38:1
Seat Tube Length, C-T	360mm	390mm	420mm	460mm
Top Tube Length, Actual C-C	568mm	590mm	613mm	642mm
Top Tube Slope	27.7deg	24.7deg	21.8deg	17.6deg
Head Tube Angle	67.6deg	67.6deg	67.6deg	67.6deg
Seat Tube Angle	73.8deg	73.8deg	73.8deg	73.8deg
Head Tube Length	100mm	110mm	120mm	130mm
Bottom Bracket Drop	45mm	45mm	45mm	45mm
Bottom Bracket Height	302.9mm	302.9mm	302.9mm	302.9mm
Chainstay Length	427mm	427mm	427mm	427mm
Chainstay Length Max	442mm	442mm	442mm	442mm
Chainstay Length Horizontal	424.6mm	424.6mm	424.6mm	424.6mm
Chainstay Length Horizontal Max	439.7mm	439.7mm	439.7mm	439.7mm
Front-Center	669mm	692mm	717mm	747mm
Front-Center Horizontal	668.4mm	691.4mm	715.4mm	746.4mm
Wheelbase	1093mm	1116mm	1140mm	1171mm
Wheelbase Max	1108.1mm	1131.1mm	1155.1mm	1186.1mm
Fork Offset/Rake	44.7mm	43.7mm	44mm	49.8mm
Fork Length (On-Axis)	512mm	512mm	512mm	512mm
Trail	95mm very high	96.1mm very high	95.8mm very high	89.5mm very high
Mechanical Trail	87.8mm	88.9mm	88.6mm	82.7mm
Wheel Flop	33.5mm	33.9mm	33.8mm	31.5mm
Standover Height	752mm	770mm	717mm	747mm
Tire to Pedal Spindle	151.1mm 170 mm cranks	174.1mm 170 mm cranks	199.1mm 170 mm cranks	229.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	132.9mm 170 mm cranks	132.9mm 170 mm cranks	132.9mm 170 mm cranks	132.9mm 170 mm cranks

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.

Category Trend

Source:https://www.somafab.com/archives/product/riff-27-5-hardtail-frame

Geometry