Fathom E+ 3
Giant
Trail
Fathom E+ 3 is an alloy electric trail mountain bike (2024), from Giant, in the Fathom series. It suits a wide range of riders thanks to its fit flexibility, with a setup that gives you a balanced riding position, and is best for smoother trails and efficient rolling. The main strengths in the metrics are strong value-for-money versus many similar bikes, good fit flexibility for dialing in rider position, and strong speed potential on smoother terrain. The trade-off to keep in mind is a firmer ride feel than comfort-first options and battery range that is better for shorter daily use than long all-day outings. Add this bike to compare on MatchBikes.com and see how it stacks up against similar trail models.
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 | XXL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.555 mm | 1.512 mm | 1.475 mm | 1.439 mm | 1.407 mm |
| Bottom Bracket Height | 309 mm | 309 mm | 309 mm | 309 mm | 309 mm |
| Front Center | 734 mm | 756 mm | 778 mm | 799 mm | 821 mm |
| Rake | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm |
| Trail | 113.4 mm | 113.4 mm | 113.4 mm | 113.4 mm | 113.4 mm |
| Stack | 647 mm | 656 mm | 665 mm | 675 mm | 684 mm |
| Reach | 416 mm | 434 mm | 451 mm | 469 mm | 486 mm |
| Top Tube Length | 590 mm | 610 mm | 630 mm | 650 | 670 mm |
| Seat Tube Angle | 75 ° | 75 ° | 75 ° | 75 ° | 75 ° |
| Seat Tube Length | 380 mm | 420 mm | 460 mm | 495 mm | 530 mm |
| Head Tube Angle | 66 ° | 66 ° | 66 ° | 66 ° | 66 ° |
| Head Tube Length | 110 mm | 120 mm | 130 mm | 140 mm | 150 mm |
| Chainstay Length | 470 mm | 470 mm | 470 mm | 470 mm | 470 mm |
| Wheelbase | 1197 mm | 1219 mm | 1241 mm | 1262 mm | 1284 mm |
| Bottom Bracket Drop | 65 mm | 65 mm | 65 mm | 65 mm | 65 mm |
| Standover Height | 730 mm | 757 mm | 750 mm | 773 mm | 776 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" |




























































