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Simplon Pride vs Storck Aerfast.4 Red Edition
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 Storck Aerfast.4 Red Edition starts €200 cheaper (€7,299 vs €7,499 for the Simplon Pride).
- Our verdict scores the Simplon Pride higher overall: 77/100 vs 71/100.
- Tire clearance: up to 30 mm on the Simplon Pride vs 28 mm on the Storck Aerfast.4 Red Edition.
Simplon Pride
Storck Aerfast.4 Red Edition
| SimplonPride | StorckAerfast.4 Red Edition | |
|---|---|---|
| Overview | ||
| Brand | Simplon | Storck |
| Build | Pride Expert Di2 | Aerfast.4 Red Edition Red eTap AXS D1 |
| Build notes | Core Selection build (model year 2026), colour Pearl White / Black. Weight is the figure Simplon's spec overview gives for size M (55) as configured. Simplon also sells the Pride through its online configurator, where groupset, wheels, cockpit and colour can be changed; those prices aren't shown here. EUR price from simplon.com (CHF also listed). | 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. |
| Price (MSRP) | €7,499€7,499€7,499 | €7,299€7,299€7,299 |
| Bike weight | 8.43 kg18.6 lb | — |
| Weight measured on size | M (55) | — |
| Model year | 2026 | 2026 |
| Generation | Pride II (second generation), sold simply as 'Pride' since model year 2025 | Aerfast.4 (fourth generation) |
| Launched | 2021-09 | 2021 |
| Newer generation | — | Aerfast.5 (2024) |
| Discipline | Aero road | Aero road |
| UCI legal | Yes | Yes |
| Verdict (out of 100) | ||
| Overall score | 77 | 71 |
| Aero | 88 | 86 |
| Frame | 76 | 74 |
| Components | 84 | 76 |
| Fit | 86 | 58 |
| Practicality | 62 | 58 |
| Price | 70 | 71 |
| Weight | 76 | — |
| Frame & fork | ||
| Frame material | Carbon (high-pressure moulded, 'Hot Melt Carbon') | Carbon (CFR/UD), Red Edition frame |
| Fork material | Carbon | — |
| Frame weight | 1,210 g2.67 lb | 950 g33.5 oz |
| Fork weight | — | 500 g17.6 oz |
| Frameset weight | — | 1,900 g4.19 lb |
| Weight measured on | Frame, size M, Simplon's claim | 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 | 125 kg275.6 lb | 120 kg264.6 lb |
| Frame sizes | 46/XXS, 49/XS, 52/S, 55/M, 58/L, 61/XL | XS, S, M |
| Colours | Pearl White / Black (Core Selection builds) | Black with red accents (Storck names no colour) |
| Also available as | A triathlon version on the same frameset with a tri cockpit developed with FSA (per Simplon's Pride II launch article) | 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 'PRIDE II' (code SIMP-PRIDE), approved 7 Jul 2021 in sizes XXS-XL (6) (UCI list version 2026.10.02); Simplon also states UCI conformity | 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 (FM140) | Hydraulic disc, flat mount (160 mm rotors front and rear as built) |
| Max rotor size | 160 mm | — |
| Wheel size | 700c | — |
| Max tire width | 30 mm | 28 mm |
| Bottom bracket standard | PF BB86 press-fit | Press-fit, 41 mm bearing bore x 86.5 mm |
| Front axle | 12 x 100 mm thru-axle | — |
| Rear axle | 12 x 142 mm thru-axle | — |
| Max chainring | 54T | — |
| Cable routing | Fully internal | Internal through the one-piece cockpit |
| Fit & adjustability | ||
| Cockpit | Two-piece: Simplon Pride Aero Bar CF with a Pride II aero stem (Pro, Marathon or Comfort version), fully internal routing | One-piece Storck RBSU Aerfast.4 bar and stem, one size per frame size |
| Seatpost type | Simplon Pride aero seatpost with integrated clamp and two saddle-clamp positions | Storck Aerfast.4 carbon aero seatpost |
| Fit notes | Three stem versions (Pro, Marathon, Comfort) with different stack, each with 15 mm of length adjustment; bar width, stem length and angle and saddle position are chosen in the configurator. The Core Selection builds use the Marathon stem (+65 mm stack, 90-105 mm reach) with a 400 mm bar in size M. Simplon publishes the frame's real stack and reach plus 'virtual' values that account for its stem design. | 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 | 55.3 W at 45 km/h in Simplon's wind-tunnel test, 30.2 W less than the first Pride; Simplon also claims a 'sail effect' that cuts drag in crosswinds | 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 | CFD and wind tunnel, developed with Swiss Side | Wind tunnel |
| Tube profile | Kamm-tail tube shapes; deep head tube and fork integrated with the frame | 80 mm wide aero fork with a camtail trailing edge |
| Travel, maintenance & warranty | ||
| Headset bearings | IS52 ICR / IS47 | — |
| Derailleur hanger | Not a UDH (SRAM Universal Derailleur Hanger) | — |
| Maintenance | Approved for rollers, turbo trainers and direct-drive trainers. | — |
| Proprietary parts | Pride Aero Bar and Pride II stems, Pride seatpost | RBSU Aerfast.4 one-piece cockpit, Aerfast.4 seatpost and headset |
| Frame warranty | 4 years on frame and fork for the first owner, 6 years with online registration within 20 days of purchase; 3-year crash replacement at 50% off | — |
| Sold via | Through Simplon dealers | Direct from Storck's web shop and Storck stores |
| Drivetrain | ||
| Groupset | Shimano Ultegra Di2 R8100 | SRAM Red eTap AXS D1 |
| Launched | 2021 · current generation | 2019 · replaced by SRAM Red AXS E1 (2024) |
| Speeds | 12-speed | 12-speed |
| Electronic | Yes | Yes |
| Wireless | — | Yes |
| Drivetrain | 2x | 2x |
| Crankset | Shimano Ultegra | SRAM Red eTap AXS D1 |
| Chainrings | 52/36 | 48/35 |
| Crank length | 172.5 mm (size M) | — |
| Bottom bracket | — | Storck Press-fit 41 x 86.5 mm |
| Standard | — | Press-fit, 41 mm bearing bore x 86.5 mm |
| Front derailleur | — | SRAM Red eTap AXS |
| Rear derailleur | — | SRAM Red eTap AXS D1 |
| Cassette | Shimano Ultegra | SRAM Red |
| Range | 11-34 | 10-33 |
| Speeds | 12-speed | 12-speed |
| Chain | — | SRAM Red |
| Brakes | ||
| Brake calipers | — | SRAM Red |
| Type | — | Hydraulic disc, flat mount |
| Notes | — | 160 mm rotors front and rear |
| Wheels & tires | ||
| Wheelset | Newmen Advanced A.50 | Storck Zeitjaeger Comp 55R |
| Material | — | Carbon |
| Weight | 1,460 g3.22 lb | — |
| Notes | Weight as listed in Simplon's spec overview | — |
| Tires | Schwalbe Pro One | Continental Grand Prix 5000 S TR |
| Tire width | 28 mm | 28 mm |
| Notes | Listed as Pro One Super Race, black | — |
| Cockpit | ||
| Handlebar | Simplon Pride Aero Bar CF | Storck RBSU Aerfast.4 |
| Type | Drop bar (two-piece cockpit with the Pride II aero stem) | One-piece bar and stem |
| Integrated stem | No | Yes |
| Bar width | 400 mm | — |
| Widths available | — | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) |
| Material | Carbon | — |
| Stem | Simplon Pride II Marathon Aero | — |
| Stem length | 90-105 mm adjustable reach, +65 mm stack (size M) | — |
| Headset | Acros AIA-552 | Storck Aerfast.4 integrated headset |
| Saddle & seatpost | ||
| Saddle | Selle Italia SLR Advan Superflow | Fizik Vento Argo R5 |
| Rails | Manganese | — |
| Seatpost | Simplon Pride | Storck Aerfast.4 Carbon |
| Material | — | Carbon |
| Bar tape | Bike Ribbon Spugna | Storck Microfibre |
| Notes | Black | Black |
| Geometry (smallest – largest size) | ||
| Sizes | 46/XXS, 49/XS, 52/S, 55/M, 58/L, 61/XL | XS, S, M, L, XL, XXL |
| Rider height min | 155–191 cm5′1″–6′3″ | 152–188 cm5′0″–6′2″ |
| Rider height max | 166–200 cm5′5″–6′7″ | 166–190 cm5′5″–6′3″ |
| Stack | 505–595 mm19.9–23.4″ | 482–576 mm19–22.7″ |
| Reach | 378–418 mm14.9–16.5″ | 362.5–418 mm14.3–16.5″ |
| Seat tube angle | 73.5° | 73° |
| Head tube angle | 71.3–73° | 70–72° |
| Head tube length | 95–181 mm3.7–7.1″ | 85–170 mm3.3–6.7″ |
| Effective top tube | 530–595 mm20.9–23.4″ | 510–595 mm20.1–23.4″ |
| Seat tube length | 452–550 mm17.8–21.7″ | 458–583 mm18–23″ |
| Chainstay | 410 mm16.1″ | 410 mm16.1″ |
| Wheelbase | 976–1,028 mm38.4–40.5″ | — |
| BB drop | 75 mm3″ | — |
| Fork length | 370 mm14.6″ | — |
| Fork offset | 45 mm1.8″ | — |
| Standover | 730–820 mm28.7–32.3″ | — |
| 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).