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Specialized S-Works Shiv TT Disc 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 Specialized S-Works Shiv TT Disc starts €800 cheaper (€5,999 vs €6,799 for the Trek Speed Concept TT).
- Tire clearance: up to 28 mm on the Specialized S-Works Shiv TT Disc vs 25 mm on the Trek Speed Concept TT.
- The Specialized S-Works Shiv TT Disc comes in 4 sizes, the Trek Speed Concept TT in 3.
Specialized S-Works Shiv TT Disc
Trek Speed Concept TT
| SpecializedS-Works Shiv TT Disc | TrekSpeed Concept TT | |
|---|---|---|
| Overview | ||
| Brand | Specialized | Trek |
| Build | S-Works Shiv TT Disc Module | Speed Concept TT Frameset |
| Build notes | Frameset module: frame, fork, Shiv TT integrated bar/stem aerobar, basebar and seatpost. A second colourway (Gloss Ruby Metallic) is listed with a 340 mm basebar width instead of 400 mm. | 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) | €5,999$6,150£5,999 | €6,799$5,500£6,200 |
| Bike weight | 2.69 kg5.9 lb | — |
| Weight measured on size | M | — |
| Model year | 2026 | 2026 |
| Generation | Shiv TT Disc (first disc-brake Shiv TT) | 3rd generation (Speed Concept 3.0) |
| Launched | 2019-07 | — |
| Discipline | Time trial | Time trial |
| UCI legal | Yes | Yes |
| Verdict (out of 100) | ||
| Aero | 80 | 82 |
| Frame | 85 | 86 |
| Hydration & storage | 38 | 42 |
| Fit | 70 | 66 |
| Practicality | 70 | 60 |
| Frame & fork | ||
| Frame material | Carbon (S-Works FACT 11r) | 800 Series OCLV Carbon |
| Fork material | Carbon (S-Works FACT) | Carbon (Speed Concept full foil, integrated brake and stem) |
| Frameset weight | 2,690 g5.93 lb | — |
| Weight measured on | Module (frame, fork, cockpit, seatpost), size M, production painted | — |
| Max system weight | — | 125 kg275.6 lb |
| Frame sizes | XS, S, M, L | S, M, L |
| Colours | Gloss Glacial Metallic / Red To Gold Pearl Edge Fade / Metallic White Silver; Gloss Ruby Metallic | Deep Smoke/Gloss Trek Black |
| Also available as | — | Speed Concept SLR triathlon frame (storage, IsoSpeed, 78-degree seat angle, sizes S to XL) |
| UCI frame approval | Listed on the UCI approved framesets list as 'Shiv TT' (frame and fork code SPE-SHIV-TT), approved 22.03.2019, sizes XS to L (4) (UCI list version 2026.10.02) | 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 | 28 mm | 25 mm |
| Bottom bracket standard | BSA threaded | — |
| Front axle | 12x100 thru-axle | — |
| Rear axle | 12x142 thru-axle | — |
| Drivetrain compatibility | Electronic only | — |
| Mechanical shifting possible | No | — |
| 1x compatible | Yes | — |
| Max chainring | — | 58T |
| Front derailleur mount | Removable derailleur hanger on the seat tube (can be removed for 1x) | — |
| Cable routing | Internal, electronic-only | Internal |
| Hydration & storage | ||
| Integrated hydration | No | — |
| Integrated storage | No | — |
| Fit & adjustability | ||
| Aerobar system | Shiv TT integrated one-piece bar/stem aerobar with Shiv TT basebar | Integrated Speed Concept cockpit; size-specific cockpit parts are sold separately with the frameset |
| Pad stack adjustment range | Pad holder stack 535-680 mm (XS), 545-690 mm (S-L) | — |
| Pad reach adjustment range | Pad reach 436-464 mm (XS), 448-476 mm (S), 463-491 mm (M), 478-506 mm (L) | — |
| Seatpost type | S-Works Venge aero seatpost (FACT carbon, Di2-compatible) | — |
| Effective seat angle range | — | 76° (nominal) |
| Aerodynamics | ||
| Manufacturer aero claims | Specialized claims it is as fast in the wind tunnel as the Shiv TT it replaced while about 500 g lighter. | — |
| Tube profile | Truncated airfoil tubes from Specialized's FreeFoil Shape Library | KVF (Kammtail Virtual Foil) |
| Travel, maintenance & warranty | ||
| Travel & packing | On Shimano Di2 builds the seatpost only comes out after removing the EW-RS910 junction and unplugging the 1200 mm wire that runs down the seat tube. For bikes that travel often, Specialized suggests replacing that wire with a 700 mm and a 500 mm wire joined by an in-line EW-JC200 junction. | — |
| Headset bearings | Specialized Shiv TT Disc headset: upper bearing 38 x 27.2 x 6.3 mm, lower bearing 45.35 x 35 x 7.3 mm | — |
| Derailleur hanger | Proprietary: Specialized MY18 road disc thru-axle hanger (S182600001); removable front derailleur hanger (S202600001) | — |
| Proprietary parts | — | Integrated fork/stem, cockpit parts and seatpost (size-specific, sold separately) |
| Sold via | Specialized online (ship to home or in-store pickup) and Specialized retailers | Trek retailers and trekbikes.com |
| Cockpit | ||
| Aerobar system | Specialized Shiv TT integrated bar/stem aerobar | — |
| Basebar | Specialized Shiv TT Basebar with integrated stem cover | — |
| Basebar width | 400 mm | — |
| Saddle & seatpost | ||
| Seatpost | Specialized S-Works Venge aero seatpost (2019), FACT carbon | — |
| 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 | 485–495 mm19.1–19.5″ | 484–533 mm19.1–21″ |
| Reach | 378–420 mm14.9–16.5″ | 398–434 mm15.7–17.1″ |
| Pad stack min | 535–545 mm21.1–21.5″ | — |
| Pad stack max | 680–690 mm26.8–27.2″ | — |
| Pad reach min | 436–478 mm17.2–18.8″ | — |
| Pad reach max | 464–506 mm18.3–19.9″ | — |
| Seat angle min | 74.5–75.8° | 76° |
| Seat angle max | 74.5–75.8° | 76° |
| Head tube angle | 71–72° | 72° |
| Head tube length | 90–95 mm3.5–3.7″ | 65–115 mm2.6–4.5″ |
| Effective top tube | 512–546 mm20.2–21.5″ | 518–566 mm20.4–22.3″ |
| Seat tube length | 504–564 mm19.8–22.2″ | 499–549 mm19.6–21.6″ |
| Chainstay | 410 mm16.1″ | 410 mm16.1″ |
| Wheelbase | 972–1,008 mm38.3–39.7″ | 982–1,034 mm38.7–40.7″ |
| BB drop | 70–72 mm2.8–2.8″ | 72 mm2.8″ |
| BB height | 269–270 mm10.6–10.6″ | — |
| Fork length | 363 mm14.3″ | — |
| Fork offset | 45 mm1.8″ | 45 mm1.8″ |
| Trail | 63–70 mm2.5–2.8″ | 63 mm2.5″ |
| Front centre | 573–609 mm22.6–24″ | — |
| Standover | 769–802 mm30.3–31.6″ | 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 |
| Stem length | 75 mm3″ | — |
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).