3T Cycling
/
Ultra

2025 3T Cycling Ultra 650B

Category
All-road/Gravel
Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Disc brake
48
Compare
Collection
I've Ridden
51
Compare
Collection
I've Ridden
54
Compare
Collection
I've Ridden
56
Compare
Collection
I've Ridden
58
Compare
Collection
I've Ridden
61
Compare
Collection
I've Ridden
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

48
51
54
56
58
61
Stack
520mm
542mm
564mm
584mm
604mm
632mm
Reach
351mm
362mm
373mm
381mm
388mm
399mm
Stack to Reach Ratio
1.48:1
1.5:1
1.51:1
1.53:1
1.56:1
1.58:1
Seat Tube Length, C-T
436mm
463mm
490mm
518mm
549mm
576mm
Top Tube Length, Effective/Horizontal HT Top
510mm
527mm
545mm
559mm
574mm
593mm
Top Tube Slope
12.1deg
11.2deg
10.4deg
9.3deg
8.1deg
8deg
Head Tube Angle
68.5deg
69.5deg
71deg
72deg
72.5deg
72.5deg
Seat Tube Angle
74deg
74deg
74deg
74deg
74deg
74deg
Head Tube Length
122mm
142mm
158mm
175mm
196mm
225mm
Bottom Bracket Drop
79mm
79mm
77mm
77mm
75mm
75mm
Bottom Bracket Height
266.3mm
266.3mm
268.3mm
268.3mm
270.3mm
270.3mm
Chainstay Length
419mm
419mm
419mm
419mm
419mm
419mm
Chainstay Length Horizontal
411.5mm
411.5mm
411.9mm
411.9mm
412.2mm
412.2mm
Front-Center
597mm
606mm
602mm
607mm
616mm
636mm
Front-Center Horizontal
591.8mm
600.8mm
597.1mm
602.1mm
611.4mm
631.6mm
Wheelbase
1003.2mm
1012.3mm
1008.9mm
1014mm
1023.7mm
1043.8mm
Fork Offset/Rake
62.4mm
61.6mm
53.3mm
53.6mm
54mm
54.3mm
Fork Length (Axle-To-Crown)
375mm
375mm
375mm
375mm
375mm
375mm
Trail
69mm
high
63.4mm
mid/​neutral
62.5mm
mid/​neutral
55.9mm
mid/​neutral
52.3mm
mid/​neutral
51.9mm
mid/​neutral
Mechanical Trail
64.2mm
59.4mm
59.1mm
53.1mm
49.8mm
49.5mm
Wheel Flop
23.5mm
20.8mm
19.3mm
16.4mm
15mm
14.9mm
Tire to Pedal Spindle
81.7mm
170 mm cranks
90.7mm
170 mm cranks
86.7mm
170 mm cranks
91.7mm
170 mm cranks
100.7mm
170 mm cranks
120.7mm
170 mm cranks
Pedal Spindle to Ground Clearance
96.3mm
170 mm cranks
96.3mm
170 mm cranks
98.3mm
170 mm cranks
98.3mm
170 mm cranks
100.3mm
170 mm cranks
100.3mm
170 mm cranks

650B Build

48
51
54
56
58
61
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
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
Tire Width Max
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
Tire Outer Diameter
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
Bike Length with Tires
1693.9mm
1703mm
1699.6mm
1704.6mm
1714.3mm
1734.5mm

Stack and Reach vs. Category Trend

Reach250mm300mm350mm400mm450mm500mmStack450mm500mm550mm600mm650mm700mm485154565861
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
Category Trend
All-road/Gravel
Source:https://us.3t.bike/products/ultra-grx-1x12-650b?variant=45577021620381
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