Compare
Stevens Arcalis vs Storck Aerfast.4 Pro
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 Stevens Arcalis starts €100 cheaper (€3,899 vs €3,999 for the Storck Aerfast.4 Pro).
- Our verdict scores the Stevens Arcalis higher overall: 80/100 vs 75/100.
- Tire clearance: up to 30 mm on the Stevens Arcalis vs 28 mm on the Storck Aerfast.4 Pro.
Stevens Arcalis
Storck Aerfast.4 Pro
| StevensArcalis | StorckAerfast.4 Pro | |
|---|---|---|
| Overview | ||
| Brand | Stevens | Storck |
| Build | Arcalis Shimano 105 | Aerfast.4 Pro 105 Di2 |
| Build notes | Base price for this groupset in Stevens' custom configurator (Germany, EUR), as listed on the Arcalis page; wheels, cockpit, tyres, saddle, crank length, colour and many other parts are chosen when ordering and some options cost extra. Base wheelset DT Swiss E 1800 alloy. | Colour Radioactive Green. Price with DT Swiss PR 1600 Spline 32 alloy wheels (size M); carbon wheels cost extra. Prices from Storck's own web shop (EUR only). No power meter. |
| Price (MSRP) | €3,899€3,899€3,899 | €4,499€4,499€4,499 |
| Model year | 2027 | 2026 |
| Generation | Aero Arcalis launched in 2021, with a lighter frame since the 2024 model | Aerfast.4 (fourth generation) |
| Launched | 2024 | 2021 |
| Newer generation | — | Aerfast.5 (2024) |
| Discipline | Aero road | Aero road |
| UCI legal | Not stated | Yes |
| Verdict (out of 100) | ||
| Overall score | 80 | 75 |
| Aero | 80 | 86 |
| Frame | 80 | 74 |
| Components | 62 | 66 |
| Fit | 90 | 72 |
| Practicality | 74 | 58 |
| Price | 94 | 93 |
| Frame & fork | ||
| Frame material | Carbon ('Carbon SL Fiber') | Carbon (CFR/UD), Pro grade |
| Fork material | STEVENS Full Carbon SL, carbon steerer | — |
| Frame weight | 950 g33.5 oz | 950 g33.5 oz |
| Fork weight | 462 g16.3 oz | 500 g17.6 oz |
| Frameset weight | — | 1,900 g4.19 lb |
| Weight measured on | Stevens' claims ('about 950 g' frame); size not stated | 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 |
| Max system weight | 115 kg253.5 lb | 120 kg264.6 lb |
| Frame sizes | 48, 51, 54, 56, 58, 61 cm | XS, S, M, L, XL (XXL for the Final Edition) |
| Colours | Dusty Lavender, Twilight Darks, White Petrol, Black Illusion | Radioactive Green (Pro), Imperial Blue Chrome (Final Edition), Pink/Black (SRCT Edition) |
| Also available as | — | Aerfast.4 Platinum, Pro, Comp and Red Edition (frame classes of the same design, same geometry); succeeded by the Aerfast.5 |
| UCI frame approval | On the UCI list of approved framesets as 'ARCALIS' (code STEV-ARC), approved 16 Apr 2021 in sizes 48-58 (6) (UCI list version 2026.10.02); Stevens now sells sizes 48-61, and the list doesn't say whether the lighter 2024 frame is a separate 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 | Hydraulic disc, flat mount (160 mm rotors front and rear as built) |
| Wheel size | 700c | — |
| Max tire width | 30 mm | 28 mm |
| Bottom bracket standard | — | Press-fit, 41 mm bearing bore x 86.5 mm |
| Front axle | 12 mm thru-axle | — |
| Rear axle | 12 mm thru-axle | — |
| Drivetrain compatibility | Shimano 105, 105 Di2, Ultegra Di2 and Dura-Ace Di2 and SRAM Rival, Force and Red AXS E1, all 2x12, in the configurator; the frame kit comes with parts for mechanical, electronic or wireless groupsets | — |
| Mechanical shifting possible | Yes | — |
| Cable routing | Fully internal with integrated cockpits; semi-integrated routing also selectable | Internal through the one-piece cockpit |
| Fit & adjustability | ||
| Cockpit | Chosen in the configurator: two-piece FSA or Deda stem and 31.8 mm bar sets, or one-piece Deda Alanera RS or FSA Vision Metron 5D ACR EVO carbon bar-stems (extra cost) | One-piece Storck RBSU Aerfast.4 bar and stem, one size per frame size |
| Standard stem and bar possible | Yes | — |
| Seatpost type | Arcalis carbon aero seatpost, 0 or 20 mm offset | Storck Aerfast.4 carbon aero seatpost |
| Fit notes | Stem lengths 70-130 mm and bar widths 38-44 cm depending on the cockpit chosen; one-piece options come in fixed stem-length and width pairs. Spacers can be chosen when ordering. Crank lengths 165-175 mm on most groupsets. | 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 | Stevens cites TOUR's 2021 wind-tunnel result of 207 W at 45 km/h | 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 | Wind tunnel |
| Tube profile | — | 80 mm wide aero fork with a camtail trailing edge |
| Travel, maintenance & warranty | ||
| Maintenance | Shimano builds can be ordered with 160/160 or 160/140 mm rotors; Stevens recommends 160/140 only for light riders on flat terrain. Trailers, racks and child seats are not permitted. | — |
| Proprietary parts | — | RBSU Aerfast.4 one-piece cockpit, Aerfast.4 seatpost and headset |
| Sold via | Custom-built to order via Stevens' online configurator and Stevens dealers | Direct from Storck's web shop and Storck stores |
| Drivetrain | ||
| Groupset | Shimano 105 | Shimano 105 Di2 R7100 |
| Launched | — | 2022 · current generation |
| Speeds | 12-speed | 12-speed |
| Electronic | No | Yes |
| Drivetrain | 2x | 2x |
| Shifters | — | Shimano 105 Di2 ST-R7170 |
| Notes | — | Combined shift and hydraulic brake levers |
| Crankset | Shimano 105 | Shimano 105 R7100 |
| Chainrings | 50/34 | 52/36 |
| Crank lengths available | 165, 170, 172.5 or 175 mm | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) |
| Bottom bracket | — | Storck Press-fit 41 x 86.5 mm |
| Standard | — | Press-fit, 41 mm bearing bore x 86.5 mm |
| Rear derailleur | — | Shimano 105 Di2 R7150 |
| Cassette | Shimano 105 R7101 | Shimano 105 R7101 |
| Range | 11-34 | 11-34 |
| Speeds | 12-speed | 12-speed |
| Chain | — | Shimano CN-M7100 |
| Brakes | ||
| Brake calipers | — | Shimano 105 |
| Type | — | Hydraulic disc, flat mount |
| Notes | — | 160 mm rotors front and rear |
| Rotors | Shimano SM-RT70 | — |
| Front rotor | 160 mm | — |
| Rear rotor | 160 mm | — |
| Wheels & tires | ||
| Wheelset | DT Swiss E 1800 Spline 20 DB | DT Swiss PR 1600 Spline 32 |
| Front rim depth | — | 32 mm |
| Rear rim depth | — | 32 mm |
| Material | Aluminium | Aluminium |
| Tubeless ready | Yes | — |
| Weight | 1,650 g3.64 lb | — |
| Notes | Center Lock | Base wheels; Zeitjaeger Platinum, Pro and Comp and DT Swiss ARC 1400 Dicut wheels cost extra |
| Tires | — | Continental Grand Prix 5000 S TR |
| Tire width | — | 25 mm |
| Cockpit | ||
| Handlebar | — | Storck RBSU Aerfast.4 |
| Type | — | One-piece bar and stem |
| Integrated stem | — | Yes |
| Widths available | — | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) |
| Headset | — | Storck Aerfast.4 integrated headset |
| Saddle & seatpost | ||
| Saddle | — | Fizik Vento Argo R5 |
| Seatpost | Stevens Arcalis Carbon | Storck Aerfast.4 Carbon |
| Offset / setback | 0 mm (20 mm optional) | — |
| Material | Carbon | Carbon |
| Notes | 330 mm, 400 mm optional | — |
| Bar tape | — | Storck Microfibre |
| Notes | — | Black |
| Geometry (smallest – largest size) | ||
| Sizes | 48, 51, 54, 56, 58, 61 | 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 | 491–594 mm19.3–23.4″ | 482–576 mm19–22.7″ |
| Reach | 378–411 mm14.9–16.2″ | 362.5–418 mm14.3–16.5″ |
| Seat tube angle | 73–75.5° | 73° |
| Head tube angle | 71.8–74° | 70–72° |
| Head tube length | — | 85–170 mm3.3–6.7″ |
| Effective top tube | 496–581 mm19.5–22.9″ | 510–595 mm20.1–23.4″ |
| Seat tube length | 471–576 mm18.5–22.7″ | 458–583 mm18–23″ |
| Chainstay | 415 mm16.3″ | 410 mm16.1″ |
| Wheelbase | 971–1,018 mm38.2–40.1″ | — |
| BB drop | 70 mm2.8″ | — |
| BB height | 272 mm10.7″ | — |
| Fork length | 371 mm14.6″ | — |
| Fork offset | 45 mm1.8″ | — |
| Front centre | 567–613 mm22.3–24.1″ | — |
| Standover | 746–846 mm29.4–33.3″ | — |
| 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).