BC40 SRAM GX Eagle Transmission
Allied
Trail
BC40 SRAM GX Eagle Transmission is a carbon trail mountain bike (2023), from Allied, part of the BC40 family. Rider-wise, it fits riders who want a more active, performance-leaning off-road feel, with a setup that gives you a sporty, active riding position, and is well suited to natural trails and mixed off-road terrain. On MatchBikes metrics, it scores well for a balanced ride feel between comfort and directness, strong climbing friendliness for sustained uphill riding, and balanced, versatile speed for everyday riding. That said, compared with more specialized alternatives, the compromise is a value score that depends more on priorities than pure price efficiency. Next step: compare this bike with other trail models on MatchBikes.com.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.43 mm | 1.37 mm | 1.31 mm | 1.27 mm |
| Bottom Bracket Height | 334 mm | 334 mm | 334 mm | 334 mm |
| Front Center | 710 mm | 739 mm | 775 mm | 806 mm |
| Rake | 44 mm | 44 mm | 44 mm | 44 mm |
| Trail | 114 mm | 115 mm | 114 mm | 114 mm |
| Stack | 593 mm | 604 mm | 617 mm | 628 mm |
| Reach | 415 mm | 440 mm | 470 mm | 496 mm |
| Top Tube Length | 564 mm | 591 mm | 625 mm | 654 mm |
| Seat Tube Angle | 76 ° | 76 ° | 76 ° | 76 ° |
| Seat Tube Length | 395 mm | 420 mm | 450 mm | 500 mm |
| Head Tube Angle | 66.5 ° | 66.5 ° | 66.5 ° | 66.5 ° |
| Head Tube Length | 95 mm | 105 mm | 120 mm | 135 mm |
| Chainstay Length | 430 mm | 430 mm | 430 mm | 430 mm |
| Wheelbase | 1140 mm | 1169 mm | 1205 mm | 1236 mm |
| Bottom Bracket Drop | 40 mm | 40 mm | 40 mm | 40 mm |
| Wheels | 29" | 29" | 29" | 29" |
| Rider Min Height | 158 cm | 168 cm | 178 cm | 186 cm |
| Rider Max Height | 171 cm | 180 cm | 189 cm | 199 cm |




























































