2018-2019 Ritchey Design Ultra Base
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 120mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
S (16") | M (17.5") | L (19") | XL (20.5") | |
Stack | 605.6mm | 612.6mm | 617.3mm | 626.6mm |
Reach | 417mm | 430mm | 445mm | 460mm |
Stack to Reach Ratio | 1.45:1 | 1.42:1 | 1.39:1 | 1.36:1 |
Seat Tube Length, C-T | 390mm | 432mm | 475mm | 515mm |
Top Tube Length, Effective/Horizontal Center | 591.3mm | 606.3mm | 628.4mm | 644mm |
Top Tube Slope | 23.7deg | 19.8deg | 15.6deg | 12.4deg |
Head Tube Angle | 68deg | 68.5deg | 68.5deg | 68.5deg |
Seat Tube Angle | 74deg | 74deg | 73.5deg | 73.5deg |
Head Tube Length | 100mm | 105mm | 110mm | 120mm |
Bottom Bracket Drop | 58mm | 58mm | 58mm | 58mm |
Bottom Bracket Height | 305.1mm | 305.1mm | 305.1mm | 305.1mm |
Chainstay Length | 439mm | 439mm | 439mm | 439mm |
Chainstay Length Horizontal | 435.2mm | 435.2mm | 435.2mm | 435.2mm |
Front-Center | 695.7mm | 705.6mm | 711.5mm | 741mm |
Front-Center Horizontal | 693.3mm | 703.3mm | 709.2mm | 738.8mm |
Wheelbase | 1128.4mm | 1138.4mm | 1144.3mm | 1173.9mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Fork Length (Axle-To-Crown) | 507mm | 507mm | 507mm | 507mm |
Trail | 91.7mm very high | 88.2mm very high | 88.2mm very high | 88.2mm very high |
Mechanical Trail | 85mm | 82.1mm | 82.1mm | 82.1mm |
Wheel Flop | 31.9mm | 30.1mm | 30.1mm | 30.1mm |
Standover Height | 742.3mm | 771.3mm | 799.5mm | 826.9mm |
Tire to Pedal Spindle | 162.6mm 170 mm cranks | 172.5mm 170 mm cranks | 178.4mm 170 mm cranks | 207.9mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 135.1mm 170 mm cranks | 135.1mm 170 mm cranks | 135.1mm 170 mm cranks | 135.1mm 170 mm cranks |
Base Build
S (16") | M (17.5") | L (19") | XL (20.5") | |
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 Width Max | 2.8in | 2.8in | 2.8in | 2.8in |
Tire Outer Diameter | 726.2mm | 726.2mm | 726.2mm | 726.2mm |
Bike Length with Tires | 1854.6mm | 1864.6mm | 1870.5mm | 1900.1mm |
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 Cross-country MTBSource:https://us.ritcheylogic.com/media/itm/magb1/Productfiles/97450008005/ritchey-ultra-geometry-1218.pdf