2025 3T Cycling Ultra 650B 54
Build
650B/27.5 in × 2.1 in
Insights
Average 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 | 564mm |
| Reach | 373mm |
| Stack to Reach Ratio | 1.51:1 |
| Seat Tube Length, C-T | 490mm |
| Top Tube Length, Effective/Horizontal HT Top | 545mm |
| Top Tube Slope | 10.4deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 158mm |
| Bottom Bracket Drop | 77mm |
| Bottom Bracket Height | 268.3mm |
| Chainstay Length | 419mm |
| Chainstay Length Horizontal | 411.9mm |
| Front-Center | 602mm |
| Front-Center Horizontal | 597.1mm |
| Wheelbase | 1008.9mm |
| Fork Offset/Rake | 53.3mm |
| Fork Length (Axle-To-Crown) | 375mm |
| Trail | 62.5mm mid/neutral |
| Mechanical Trail | 59.1mm |
| Wheel Flop | 19.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 86.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 98.3mm |
650B Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.1in |
| Tire Outer Diameter | 690.7mm |
| Bike Length with Tires | 1699.6mm |
| 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