2025 3T Cycling Ultra 650B 48

Build

650B/27.5 in × 2.1 in

Insights

Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of 3T Cycling Ultra

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
520mm
Reach
351mm
Stack to Reach Ratio
1.48:1
Seat Tube Length, C-T
436mm
Top Tube Length, Effective/Horizontal HT Top
510mm
Top Tube Slope
12.1deg
Head Tube Angle
68.5deg
Seat Tube Angle
74deg
Head Tube Length
122mm
Bottom Bracket Drop
79mm
Bottom Bracket Height
266.3mm
Chainstay Length
419mm
Chainstay Length Horizontal
411.5mm
Front-Center
597mm
Front-Center Horizontal
591.8mm
Wheelbase
1003.2mm
Fork Offset/Rake
62.4mm
Fork Length (Axle-To-Crown)
375mm
Trail
69mm
high
Mechanical Trail
64.2mm
Wheel Flop
23.5mm
Tire to Pedal Spindle Distance
With 170 mm cranks
81.7mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
96.3mm

650B Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
2.1in
Tire Outer Diameter
690.7mm
Bike Length with Tires
1693.9mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Carbon/Composite
Fork Material
Carbon/Composite
Brake Type
Disc
Source:https://us.3t.bike/products/ultra-grx-1x12-650b?variant=45577021620381