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Storck Aerfast.4 Red Edition vs Wilier Triestina Filante SLR
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 Wilier Triestina Filante SLR starts €300 cheaper (€6,999 vs €7,299 for the Storck Aerfast.4 Red Edition).
- Our verdict scores the Wilier Triestina Filante SLR higher overall: 75/100 vs 71/100.
- Tire clearance: up to 28 mm on the Storck Aerfast.4 Red Edition vs 30 mm on the Wilier Triestina Filante SLR.
Storck Aerfast.4 Red Edition
Wilier Triestina Filante SLR
| StorckAerfast.4 Red Edition | Wilier TriestinaFilante SLR | |
|---|---|---|
| Overview | ||
| Brand | Storck | Wilier Triestina |
| Build | Aerfast.4 Red Edition Red eTap AXS D1 | Filante SLR Shimano Dura-Ace Di2, Miche Asfalto 45 |
| Build notes | Fixed build with the previous-generation SRAM Red AXS (D1) and Zeitjaeger Comp 55R wheels, sizes XS-M. MSRP €7,299; Storck showed it reduced to €5,499 on 2 Nov 2026. Price from Storck's own web shop (EUR only). No power meter. | Wilier code E603IDAS. Wilier's spec lists the rear derailleur as "FD-R9250", a typo for RD-R9250. |
| Price (MSRP) | €7,299€7,299€7,299 | €6,999€6,999€6,999 |
| Model year | 2026 | 2027 |
| Generation | Aerfast.4 (fourth generation) | Filante SLR (first generation) |
| Launched | 2021 | — |
| Newer generation | Aerfast.5 (2024) | — |
| Discipline | Aero road | Aero road |
| UCI legal | Yes | Not stated |
| Verdict (out of 100) | ||
| Overall score | 71 | 75 |
| Aero | 86 | 84 |
| Frame | 74 | 82 |
| Components | 76 | 82 |
| Fit | 58 | 70 |
| Practicality | 58 | 58 |
| Price | 71 | 73 |
| Frame & fork | ||
| Frame material | Carbon (CFR/UD), Red Edition frame | Carbon monocoque (HUS-mod with liquid crystal polymer) |
| Fork material | — | Carbon monocoque |
| Frame weight | 950 g33.5 oz | 870 g30.7 oz |
| Fork weight | 500 g17.6 oz | 360 g12.7 oz |
| Frameset weight | 1,900 g4.19 lb | — |
| Weight measured on | Storck's 'from' weights on its Aerfast.4 Platinum and Pro frameset pages (frame, fork, one-piece cockpit; frameset includes seatpost and headset); not split by grade or size | Wilier's figures, +/- 5%; size not stated |
| Max system weight | 120 kg264.6 lb | — |
| Frame sizes | XS, S, M | XS, S, M, L, XL, XXL |
| Colours | Black with red accents (Storck names no colour) | — |
| Also available as | Aerfast.4 Platinum, Pro, Comp and Red Edition (frame classes of the same design, same geometry); succeeded by the Aerfast.5 | Filante SLR ID2 (second generation) |
| UCI frame approval | On the UCI list of approved framesets as 'AERFAST.3 / AERFAST.4' (code STOR-AEF), approved 8 Feb 2023 in sizes XS-XXL (6) (UCI list version 2026.10.02); the list doesn't distinguish the grades | — |
| Compatibility & standards | ||
| Brake type | Hydraulic disc, flat mount (160 mm rotors front and rear as built) | Hydraulic disc |
| Wheel size | — | 700c |
| Max tire width | 28 mm | 30 mm |
| Bottom bracket standard | Press-fit, 41 mm bearing bore x 86.5 mm | PressFit 86.5 |
| Cable routing | Internal through the one-piece cockpit | — |
| Fit & adjustability | ||
| Cockpit | One-piece Storck RBSU Aerfast.4 bar and stem, one size per frame size | One-piece bar and stem (Wilier F-Bar, 380 g) |
| Seatpost type | Storck Aerfast.4 carbon aero seatpost | Wilier Filante carbon seatpost, 15 mm setback |
| Fit notes | Each frame size comes with one cockpit size, from 380 mm bar / 90 mm stem (XS) to 440 / 120 mm (XXL). Storck says a computer mount and triathlon extensions can be retrofitted, and lists its TT kit as compatible with the Aerfast.4. | — |
| Aerodynamics | ||
| Manufacturer aero claims | Storck says the Aerfast.4 measured 199 W at 45 km/h in TOUR's wind-tunnel test; TOUR's own figures were 201 W for the Pro Disc and 202 W for the Comp Disc | — |
| Testing method | Wind tunnel | — |
| Tube profile | 80 mm wide aero fork with a camtail trailing edge | — |
| Travel, maintenance & warranty | ||
| Proprietary parts | RBSU Aerfast.4 one-piece cockpit, Aerfast.4 seatpost and headset | — |
| Sold via | Direct from Storck's web shop and Storck stores | — |
| Drivetrain | ||
| Groupset | SRAM Red eTap AXS D1 | Shimano Dura-Ace Di2 R9200 |
| Launched | 2019 · replaced by SRAM Red AXS E1 (2024) | 2021 · current generation |
| Speeds | 12-speed | 12-speed |
| Electronic | Yes | Yes |
| Wireless | Yes | — |
| Drivetrain | 2x | 2x |
| Shifters | — | Shimano Dura-Ace Di2 ST-R9270 |
| Crankset | SRAM Red eTap AXS D1 | Shimano Dura-Ace R9200 |
| Chainrings | 48/35 | 50/34 |
| Bottom bracket | Storck Press-fit 41 x 86.5 mm | Miche Integrale PF86.5 |
| Standard | Press-fit, 41 mm bearing bore x 86.5 mm | PressFit 86.5 |
| Front derailleur | SRAM Red eTap AXS | Shimano Dura-Ace Di2 R9250 |
| Rear derailleur | SRAM Red eTap AXS D1 | Shimano Dura-Ace Di2 R9250 |
| Cassette | SRAM Red | Shimano Dura-Ace R9200 |
| Range | 10-33 | 11-34 |
| Speeds | 12-speed | 12-speed |
| Chain | SRAM Red | — |
| Brakes | ||
| Brake calipers | SRAM Red | Shimano Dura-Ace BR-R9270 |
| Type | Hydraulic disc, flat mount | Hydraulic disc |
| Notes | 160 mm rotors front and rear | — |
| Rotors | — | Shimano RT-CL900 |
| Front rotor | — | 160 mm |
| Rear rotor | — | 140 mm |
| Wheels & tires | ||
| Wheelset | Storck Zeitjaeger Comp 55R | Miche Asfalto 45 Carbon |
| Front rim depth | — | 45 mm |
| Rear rim depth | — | 45 mm |
| Material | Carbon | Carbon |
| Tires | Continental Grand Prix 5000 S TR | Vittoria Corsa Pro |
| Tire width | 28 mm | 28 mm |
| Cockpit | ||
| Handlebar | Storck RBSU Aerfast.4 | Wilier F-Bar |
| Type | One-piece bar and stem | One-piece bar and stem |
| Integrated stem | Yes | Yes |
| Widths available | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | — |
| Material | — | Carbon |
| Weight | — | 380 g13.4 oz |
| Headset | Storck Aerfast.4 integrated headset | — |
| Saddle & seatpost | ||
| Saddle | Fizik Vento Argo R5 | Selle Italia SLR Boost TM Superflow L3 |
| Seatpost | Storck Aerfast.4 Carbon | Wilier Filante carbon seatpost |
| Offset / setback | — | -15 mm |
| Material | Carbon | Carbon |
| Bar tape | Storck Microfibre | — |
| Notes | Black | — |
| Geometry (smallest – largest size) | ||
| Sizes | XS, S, M, L, XL, XXL | XS, S, M, L, XL, XXL |
| Rider height min | 152–188 cm5′0″–6′2″ | — |
| Rider height max | 166–190 cm5′5″–6′3″ | — |
| Stack | 482–576 mm19–22.7″ | 505–587 mm19.9–23.1″ |
| Reach | 362.5–418 mm14.3–16.5″ | 380–399 mm15–15.7″ |
| Seat tube angle | 73° | 72.5–75.2° |
| Head tube angle | 70–72° | 70.8–73.5° |
| Head tube length | 85–170 mm3.3–6.7″ | 104–181 mm4.1–7.1″ |
| Effective top tube | 510–595 mm20.1–23.4″ | 515–583 mm20.3–23″ |
| Seat tube length | 458–583 mm18–23″ | 432–542 mm17–21.3″ |
| Chainstay | 410 mm16.1″ | 407–411 mm16–16.2″ |
| Wheelbase | — | 981–1,006 mm38.6–39.6″ |
| Wheel size | — | 700c |
| Crank length | 170–175 mm6.7–6.9″ | — |
| Stem length | 90–120 mm3.5–4.7″ | — |
| Handlebar width | 380–440 mm15–17.3″ | — |
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).