2026 Transition Spire Carbon vs 2025 Trek Slash T-Type Gen 6
The XL is the Trek Slash T-Type Gen 6 size closest to your XXL Transition Spire Carbon. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Trek Slash T-Type Gen 6
Compared with the Transition Spire Carbon in XXL, the Trek Slash T-Type Gen 6 in XL places the top of the head tube 3 mm higher and 20 mm further back, relative to the bottom bracket. Its wheelbase is 36 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +3 mm
- Higher front end
- Frame reach
- −20 mm
- Shorter frame reach
- Wheelbase
- −36 mm
- Shorter: quicker to change direction
- Head angle
- +0.9°
- Steeper: sharper steering
- Chainstays
- −9 mm
- Shorter: livelier
The two frames
Transition Spire Carbon, XXLTrek Slash T-Type Gen 6, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Transition Spire Carbon XXL | Trek Slash T-Type Gen 6 XL | Difference |
|---|---|---|---|
| Reach | 530 | 510 | −20 mm |
| Stack | 651 | 654 | +3 mm |
| Head tube angle | 62.5 | 63.4 | +0.9° |
| Seat tube angle | 76.7 | 76.7 | ±0.0° |
| Effective top tube | 664 | not listed | |
| Chainstay length | 454 | 445 | −9 mm |
| Wheelbase | 1354 | 1318 | −36 mm |
| BB drop | 32 | 27 | −5 mm |
| BB height | 343 | 350 | +7 mm |
| Seat tube length | 490 | 470 | −20 mm |
| Head tube length | 130 | 140 | +10 mm |
Differences are the Trek Slash T-Type Gen 6 minus the Transition Spire Carbon. Full charts: 2026 Transition Spire Carbon, 2025 Trek Slash T-Type Gen 6.
Where each sits in its class
Transition Spire CarbonTrek Slash T-Type Gen 6
Each bike is ranked against the other enduro bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Transition Spire CarbonCarbon Eagle 90 | Trek Slash T-Type Gen 69 GX AXS T-Type Gen 6 |
|---|---|---|
| Frame | Transition Spire | Trek Slash |
| Fork | RockShox Zeb Ultimate Charger 3 RC2 | RockShox Zeb Select+ |
| Rear shock | RockShox Vivid Ultimate | RockShox Vivid Select+ |
| Shifter | SRAM Eagle AXS | SRAM Pod Controller |
| Derailleur | SRAM Eagle 90 Transmission | SRAM GX Eagle Transmission |
| Cassette | SRAM GX Eagle Transmission | SRAM GX Eagle Transmission |
| Chain | SRAM GX Eagle Transmission | SRAM GX Eagle Transmission |
| Crankset | SRAM Eagle 90 Transmission | SRAM GX Eagle Transmission |
| Chainring | SRAM Eagle AXS | SRAM GX Eagle Transmission |
| Wheelset | DT Swiss EX1700 SPLINE 30 | Bontrager Line Comp 30 |
| Tire | Schwalbe Magic Mary Radial, Schwalbe Albert Radial | Bontrager SE5, Bontrager SE5 Team Issue |
| Brake | SRAM Maven Silver Stealth | SRAM Code |
| Rotor | SRAM CenterLine | SRAM Centerline |
| Handlebar | Burgtec Ride Wide Alloy Enduro | Bontrager Line |
| Stem | Burgtec Enduro MK3 35 | Bontrager Elite |
| Grips | ODI Longneck V2.1 | Bontrager XR Trail |
| Headset | FSA NO.55R/57 | Cartridge bearing |
| Dropper post | OneUp Components dropper post | Bontrager Line |
| Saddle | SDG Bel Air 3 | Bontrager Verse P3 |
| Bottom bracket | not listed | SRAM DUB MTB |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
