2021 Trek Bikes Rail 5 21.5 Low
Build
700C/29 in × 2.6 in
Insights
Average stack and reach vs trend of full-suspension all-mountain/enduro mtb bikes
Design deviates from other sizes of Trek Bikes Rail
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 639mm |
| Reach | 495mm |
| Stack to Reach Ratio | 1.29:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Length, Effective/Horizontal Center | 666mm |
| Top Tube Slope | 14deg |
| Head Tube Angle | 64.5deg |
| Seat Tube Angle | 75deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 35mm |
| Bottom Bracket Height | 342mm |
| Chainstay Length | 448mm |
| Chainstay Length Horizontal | 446.6mm |
| Front-Center | 832.1mm |
| Front-Center Horizontal | 831.4mm |
| Wheelbase | 1278mm |
| Fork Offset/Rake | 43mm |
| Fork Length (Axle-To-Crown) | 537mm |
| Trail | 132.2mm very high |
| Mechanical Trail | 119.3mm |
| Wheel Flop | 51.4mm |
| Standover Height | 775mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 290.1mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 177mm |
5 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 754.1mm |
| Bike Length with Tires | 2032.1mm |
| Crank Length | 165mm |
| Handlebar Width | 750mm |
| Stem Length | 5cm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 170mm |
| Rear Travel | Unknown |
| Suspension Sag | 25% |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
| Features | E-bike |
Published Sizing Recommendations
| Height | 186 cm to 196 cm |
| PBH | 87 cm to 92 cm |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/electric-mountain-bikes/rail/rail-5/p/30913/?colorCode=greendark_black