2018-2019 Ritchey Design Ultra Base

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 Scale
Source:https://us.ritcheylogic.com/media/itm/magb1/Productfiles/97450008005/ritchey-ultra-geometry-1218.pdf