2024 Soma Fabrications Riff Base
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 120mm fork travel, 25% sag
- Features
- Disc brake
Geometry
XS | SM | MD | LG | |
Stack | 603mm | 613mm | 622mm | 626mm |
Reach | 404mm | 425mm | 445mm | 467mm |
Stack to Reach Ratio | 1.49:1 | 1.44:1 | 1.4:1 | 1.34:1 |
Seat Tube Length, C-T | 360mm | 390mm | 420mm | 460mm |
Top Tube Length, Actual C-C | 568mm | 590mm | 613mm | 642mm |
Top Tube Slope | 27.2deg | 24.2deg | 21.4deg | 17.2deg |
Head Tube Angle | 69deg | 69deg | 69deg | 69deg |
Seat Tube Angle | 75.2deg | 75.2deg | 75.2deg | 75.2deg |
Head Tube Length | 100mm | 110mm | 120mm | 130mm |
Bottom Bracket Drop | 55mm | 55mm | 55mm | 55mm |
Bottom Bracket Height | 292.9mm | 292.9mm | 292.9mm | 292.9mm |
Chainstay Length | 427mm | 427mm | 427mm | 427mm |
Chainstay Length Horizontal | 423.4mm | 423.4mm | 423.4mm | 423.4mm |
Front-Center | 669mm | 692mm | 717mm | 747mm |
Front-Center Horizontal | 669.6mm | 692.6mm | 716.6mm | 747.6mm |
Wheelbase | 1093mm | 1116mm | 1140mm | 1171mm |
Fork Offset/Rake | 51.5mm | 49.8mm | 50.3mm | 57.3mm |
Fork Length, Unknown | 484mm | 484mm | 484mm | 484mm |
Trail | 78.3mm high | 80.2mm very high | 79.6mm high | 72.2mm high |
Mechanical Trail | 73.1mm | 74.9mm | 74.3mm | 67.4mm |
Wheel Flop | 26.2mm | 26.8mm | 26.6mm | 24.1mm |
Standover Height | 752mm | 770mm | 789mm | 813mm |
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 | 122.9mm 170 mm cranks | 122.9mm 170 mm cranks | 122.9mm 170 mm cranks | 122.9mm 170 mm cranks |
Base Build
XS | SM | MD | LG | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 2.2in | 2.2in | 2.2in | 2.2in |
Tire Width Max | 2.8in | 2.8in | 2.8in | 2.8in |
Tire Outer Diameter | 695.8mm | 695.8mm | 695.8mm | 695.8mm |
Bike Length with Tires | 1788.8mm | 1811.8mm | 1835.8mm | 1866.8mm |
Stack and Reach vs. Category Trend
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 ScaleCategory Trend
Hardtail Trail MTBSource:https://www.somafab.com/archives/product/riff-27-5-hardtail-frame