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Cube Aerium C:68X TT vs Trek Speed Concept TT
Pick up to 4 bikes. Rows line up component by component. Highlighted rows differ, and green marks the best value where lower or higher is clearly better.
Key differences
- The Cube Aerium C:68X TT starts €3,300 cheaper (€3,499 vs €6,799 for the Trek Speed Concept TT).
- Tire clearance: up to 27 mm on the Cube Aerium C:68X TT vs 25 mm on the Trek Speed Concept TT.
- The Cube Aerium C:68X TT comes in 4 sizes, the Trek Speed Concept TT in 3.
Cube Aerium C:68X TT
Trek Speed Concept TT
| CubeAerium C:68X TT | TrekSpeed Concept TT | |
|---|---|---|
| Overview | ||
| Brand | Cube | Trek |
| Build | Aerium C:68X TT Frameset | Speed Concept TT Frameset |
| Build notes | Frameset with CUBE Aerium C:68X TT cockpit (400 mm, 0 mm rise basebar), Profile Design 43 ASC Carbon extensions, seatpost and headset. Equipment list includes CUBE Concept Front Hydration and Concept Gear Unit. | GBP price from trekbikes.com/gb and EUR price from trekbikes.com/de. Trek says the size-specific seatpost and cockpit parts are sold separately with Speed Concept framesets. |
| Price (MSRP) | €3,499€3,499€3,499 | €6,799$5,500£6,200 |
| Bike weight | 4.3 kg9.5 lb | — |
| Model year | 2026 | 2026 |
| Generation | — | 3rd generation (Speed Concept 3.0) |
| Discipline | Time trial | Time trial |
| UCI legal | Yes | Yes |
| Verdict (out of 100) | ||
| Aero | 76 | 82 |
| Frame | 70 | 86 |
| Hydration & storage | 50 | 42 |
| Fit | 62 | 66 |
| Practicality | 64 | 60 |
| Frame & fork | ||
| Frame material | Carbon (C:68X) | 800 Series OCLV Carbon |
| Fork material | Carbon (Aerium C:68 TT) | Carbon (Speed Concept full foil, integrated brake and stem) |
| Max system weight | 100 kg220.5 lb | 125 kg275.6 lb |
| Frame sizes | XS, S, M, L | S, M, L |
| Colours | carbon'n'prism | Deep Smoke/Gloss Trek Black |
| Also available as | Aerium C:68X (triathlon frame with integrated hydration, not UCI-legal) | Speed Concept SLR triathlon frame (storage, IsoSpeed, 78-degree seat angle, sizes S to XL) |
| UCI frame approval | — | UCI-approved as 'MY22 Speed Concept TT' (frame and fork code TREK-061), approved 28.01.2021, sizes S to L (3). The list also has a separate 'Speed Concept TT' entry (TREK-070) approved 12.05.2023 for size 58 only (UCI list version 2026.10.02) |
| Compatibility & standards | ||
| Brake type | Flat-mount disc | Hydraulic disc |
| Max rotor size | — | 160 mm |
| Wheel size | 700c | 700c |
| Max tire width | 27 mm | 25 mm |
| Front axle | 12x100 thru-axle | — |
| Rear axle | 12x142 thru-axle | — |
| Max chainring | — | 58T |
| Cable routing | Fully integrated | Internal |
| Hydration & storage | ||
| Integrated hydration | No | — |
| Fit & adjustability | ||
| Aerobar system | CUBE Aerium C:68X TT Cockpit System | Integrated Speed Concept cockpit; size-specific cockpit parts are sold separately with the frameset |
| Seatpost type | CUBE Aerium C:68 TT Aero seatpost | — |
| Effective seat angle range | — | 76° (nominal) |
| Aerodynamics | ||
| Testing method | CFD and wind-tunnel testing | — |
| Tube profile | — | KVF (Kammtail Virtual Foil) |
| Travel, maintenance & warranty | ||
| Headset bearings | FSA 1-1/8" integrated | — |
| Proprietary parts | — | Integrated fork/stem, cockpit parts and seatpost (size-specific, sold separately) |
| Sold via | Through CUBE dealers | Trek retailers and trekbikes.com |
| Cockpit | ||
| Aerobar system | CUBE Aerium C:68X TT Cockpit System | — |
| Basebar | CUBE Aerium C:68X TT Cockpit System | — |
| Basebar width | 400 mm | — |
| Extensions | Profile Design 43 ASC Carbon | — |
| Headset | FSA 1 1/8" integrated | — |
| Saddle & seatpost | ||
| Seatpost | CUBE Aerium C:68 TT Aero | — |
| Geometry (smallest – largest size) | ||
| Sizes | XS, S, M, L | S, M, L |
| Rider height min | — | 154–175 cm5′1″–5′9″ |
| Rider height max | — | 167–186 cm5′6″–6′1″ |
| Stack | 487–540 mm19.2–21.3″ | 484–533 mm19.1–21″ |
| Reach | 396–442 mm15.6–17.4″ | 398–434 mm15.7–17.1″ |
| Seat angle min | 78° | 76° |
| Seat angle max | 78° | 76° |
| Head tube angle | 72° | 72° |
| Head tube length | 74–129 mm2.9–5.1″ | 65–115 mm2.6–4.5″ |
| Effective top tube | 499–557 mm19.6–21.9″ | 518–566 mm20.4–22.3″ |
| Seat tube length | 535–588 mm21.1–23.1″ | 499–549 mm19.6–21.6″ |
| Chainstay | 408 mm16.1″ | 410 mm16.1″ |
| Wheelbase | 977–1,041 mm38.5–41″ | 982–1,034 mm38.7–40.7″ |
| BB drop | 78 mm3.1″ | 72 mm2.8″ |
| Fork offset | — | 45 mm1.8″ |
| Trail | — | 63 mm2.5″ |
| Standover | — | 751–800 mm29.6–31.5″ |
| Saddle height min | — | 559–604 mm22–23.8″ |
| Saddle height max | — | 756–805 mm29.8–31.7″ |
| Wheel size | — | 700c |
| Basebar width | 400 mm15.7″ | — |
Geometry overlay
Pick a size for each bike to see frames and arm-pad ranges on top of each other.
Drawn to scale (how to read it).