2018-2019 Ritchey Design Ultra Base XL (20.5")

Build

650B/27.5 in × 2.8 in

Insights

Average stack and reach vs trend of hardtail cross-country mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
626.6mm
Reach
460mm
Stack to Reach Ratio
1.36:1
Seat Tube Length, C-T
515mm
Top Tube Length, Effective/Horizontal Center
644mm
Top Tube Slope
12.4deg
Head Tube Angle
68.5deg
Seat Tube Angle
73.5deg
Head Tube Length
120mm
Bottom Bracket Drop
58mm
Bottom Bracket Height
305.1mm
Chainstay Length
439mm
Chainstay Length Horizontal
435.2mm
Front-Center
741mm
Front-Center Horizontal
738.8mm
Wheelbase
1173.9mm
Fork Offset/Rake
51mm
Fork Length (Axle-To-Crown)
507mm
Trail
88.2mm
very high
Mechanical Trail
82.1mm
Wheel Flop
30.1mm
Standover Height
826.9mm
Tire to Pedal Spindle Distance
With 170 mm cranks
207.9mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
135.1mm

Base Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
2.8in
Tire Outer Diameter
726.2mm
Bike Length with Tires
1900.1mm
Suspension Type
Hardtail (Front suspension)
Bar Type
Flat Bar
Fork Travel
120mm
Suspension Sag
Unknown
Frame Material
Steel
Fork Material
N/A
Brake Type
Disc
Source:https://us.ritcheylogic.com/media/itm/magb1/Productfiles/97450008005/ritchey-ultra-geometry-1218.pdf