2018 Genesis Bikes Tarn Base
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 120mm fork travel, 20% sag
- Features
- Disc brake
Geometry
S | M | L | XL | |
Stack | 633mm | 638mm | 638mm | 642mm |
Reach | 415mm | 440mm | 465mm | 490mm |
Stack to Reach Ratio | 1.53:1 | 1.45:1 | 1.37:1 | 1.31:1 |
Seat Tube Length, C-T | 370mm | 433mm | 483mm | 533mm |
Top Tube Length, Effective/Horizontal Unknown | 597mm | 623mm | 648mm | 675mm |
Top Tube Slope | 28.2deg | 21.6deg | 16.2deg | 11.5deg |
Head Tube Angle | 68deg | 68deg | 68deg | 68deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 74deg |
Head Tube Length | 100mm | 105mm | 105mm | 110mm |
Bottom Bracket Drop | 55mm | 55mm | 55mm | 55mm |
Bottom Bracket Height | 308.1mm | 308.1mm | 308.1mm | 308.1mm |
Chainstay Length | 432mm | 432mm | 432mm | 432mm |
Chainstay Length Horizontal | 428.5mm | 428.5mm | 428.5mm | 428.5mm |
Front-Center | 705.7mm | 732.6mm | 757.5mm | 784.5mm |
Front-Center Horizontal | 703.5mm | 730.5mm | 755.5mm | 782.5mm |
Wheelbase | 1132mm | 1159mm | 1184mm | 1211mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Trail | 91.7mm very high | 91.7mm very high | 91.7mm very high | 91.7mm very high |
Mechanical Trail | 85mm | 85mm | 85mm | 85mm |
Wheel Flop | 31.9mm | 31.9mm | 31.9mm | 31.9mm |
Standover Height | 759mm | 760mm | 785mm | 807mm |
Tire to Pedal Spindle | 172.5mm 170 mm cranks | 199.5mm 170 mm cranks | 224.4mm 170 mm cranks | 251.3mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 138.1mm 170 mm cranks | 138.1mm 170 mm cranks | 138.1mm 170 mm cranks | 138.1mm 170 mm cranks |
Base Build
S | M | L | XL | |
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 | 2.8in | 2.8in | 2.8in | 2.8in |
Tire Outer Diameter | 726.2mm | 726.2mm | 726.2mm | 726.2mm |
Bike Length with Tires | 1858.2mm | 1885.2mm | 1910.2mm | 1937.2mm |
Handlebar Width | 760mm | 760mm | 760mm | 760mm |
Stem Length | 55mm | 55mm | 55mm | 55mm |
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://99spokes.com/en-GB/bikes/genesis/2018/tarn-20 , https://geometrygeeks.bike/bike/genesis-tarn-20-2020/