Powerfly+ 8 Gen 5
Trek
Crosscountry
Powerfly+ 8 Gen 5 is an alloy electric cross-country mountain bike (2025), from Trek, part of the Powerfly family. Rider-wise, it fits a wide range of riders thanks to its fit flexibility, with a balanced riding position, with a surface profile that is best for smoother trails and efficient rolling. The main strengths in the metrics are strong climbing friendliness for sustained uphill riding, good fit flexibility for dialing in rider position, and a balanced ride feel between comfort and directness. That said, the trade-off to keep in mind is less emphasis on outright speed than speed-focused builds and a value score that depends more on priorities than pure price efficiency. Compare this bike across categories on MatchBikes.com to see whether a nearby segment gives you a better fit.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Battery
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
E-Bike Components
Geometry
| Measurement | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.461 mm | 1.457 mm | 1.409 mm | 1.373 mm |
| Bottom Bracket Height | 315 mm | 315 mm | 315 mm | 315 mm |
| Front Center | 713 mm | 741 mm | 772 mm | 805 mm |
| Rake | 44 mm | 44 mm | 44 mm | 44 mm |
| Trail | 116 mm | 117 mm | 117 mm | 117 mm |
| Stack | 599 mm | 641 mm | 655 mm | 673 mm |
| Reach | 410 mm | 440 mm | 465 mm | 490 mm |
| Top Tube Length | 571 mm | 612 mm | 640 mm | 658 mm |
| Seat Tube Angle | 75 ° | 75 ° | 75 ° | 76 ° |
| Seat Tube Length | 370 mm | 400 mm | 420 mm | 450 mm |
| Head Tube Angle | 65.5 ° | 66.5 ° | 66.5 ° | 66.5 ° |
| Head Tube Length | 133 mm | 108 mm | 123 mm | 143 mm |
| Chainstay Length | 442 mm | 461 mm | 461 mm | 461 mm |
| Wheelbase | 1151 mm | 1195 mm | 1226 mm | 1259 mm |
| Bottom Bracket Drop | 45 mm | 65 mm | 65 mm | 65 mm |
| Standover Height | 697 mm | 747 mm | 746 mm | 746 mm |
| Wheels | 27" | 29" | 29" | 29" |
| Rider Min Height | 155 cm | 164 cm | 175 cm | 187 cm |
| Rider Max Height | 166 cm | 178 cm | 189 cm | 195 cm |




























































