2025 Transition Bikes Sentinel Alloy SM
Build
700C/29 in × 2.4 in
Insights
Average stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Transition Bikes Sentinel
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 615mm |
| Reach | 430mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, C-T | 360mm |
| Top Tube Length, Effective/Horizontal HT Top | 557mm |
| Head Tube Angle | 64deg |
| Effective Seat Tube Angle, ETT HT Top | 78.7deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 25mm |
| Bottom Bracket Height | 347mm |
| Chainstay Length | 442mm |
| Chainstay Length Horizontal | 441.3mm |
| Front-Center | 767.1mm |
| Front-Center Horizontal | 766.7mm |
| Wheelbase | 1208mm |
| Fork Offset/Rake | 44mm |
| Fork Length (Axle-To-Crown) | 578mm |
| Trail | 132.5mm very high |
| Mechanical Trail | 119.1mm |
| Wheel Flop | 52.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 225.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 177mm |
Alloy Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1951.9mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 160mm |
| Rear Travel | 150mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.transitionbikes.com/Bikes/Sentinel