AeroAddicts

StorckAerfast.4 Red Edition

Aero road2026Aerfast.4 (fourth generation) ↗Disc brakesUCI legal

Newer version: Storck Aerfast.5

A special frame class of Storck's previous-generation Aerfast.4 aero race bike, sold only with SRAM Red. The remaining stock comes in one fixed build with the previous-generation Red eTap AXS (D1), Zeitjaeger Comp 55R carbon wheels and 28 mm tyres, in sizes XS to M only.

Storck Aerfast.4 Red Edition, drive side
© Storck Bicycle GmbH
From
€7,299€7,299€7,299
Builds
1
Sizes
6
Frame weight
950 g33.5 oz

Our verdict

Overall

out of 100, average of 6 categories

A run-out special: proven Aerfast.4 aero shape with a top SRAM Red groupset and carbon wheels, now heavily discounted. The Red is the previous D1 generation, only three small sizes are left, the tyre limit is 28 mm and there's no power meter.

Scored Nov 2026

  • + Aero-first design

AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.

Aero
86/100

Aero claims and front-end integration

Frame
74/100

Carbon grade, weight and warranty

Components
76/100

Groupset, wheels and power meter

Fit
58/100

Sizes and adjustment range

Practicality
58/100

Travel, standard parts, servicing

Price
71/100

From the cheapest complete-bike MSRP

How each category is scored

Bike duel

Frame & platform

Frame & fork

Frame material
Carbon (CFR/UD), Red Edition frame
Frame weight
950 g33.5 oz
Fork weight
500 g17.6 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
Max system weight
120 kg264.6 lb
Frame sizes
XS, S, M
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
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)
Max tire width
28 mm
Bottom bracket standard
Press-fit, 41 mm bearing bore x 86.5 mm
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
Seatpost type
Storck Aerfast.4 carbon aero seatpost
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

Photos

Storck Aerfast.4 Red Edition, drive side
© Storck Bicycle GmbH
Storck Aerfast.4 Red Edition, three-quarter front view
© Storck Bicycle GmbH

Builds & components

Highlighted rows differ between builds. Green marks the best value.

Storck Aerfast.4 Red Edition builds
Aerfast.4 Red Edition Red eTap AXS D1
Overview
Price (MSRP)€7,299€7,299€7,299
TypeComplete bike
NotesFixed 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.
Drivetrain
GroupsetSRAM Red eTap AXS D1
Launched2019 · replaced by SRAM Red AXS E1 (2024)
Speeds12-speed
ElectronicYes
WirelessYes
Drivetrain2x
CranksetSRAM Red eTap AXS D1
Chainrings48/35
Bottom bracketStorck Press-fit 41 x 86.5 mm
StandardPress-fit, 41 mm bearing bore x 86.5 mm
Front derailleurSRAM Red eTap AXS
Rear derailleurSRAM Red eTap AXS D1
CassetteSRAM Red
Range10-33
Speeds12-speed
ChainSRAM Red
Brakes
Brake calipersSRAM Red
TypeHydraulic disc, flat mount
Notes160 mm rotors front and rear
Wheels & tires
WheelsetStorck Zeitjaeger Comp 55R
MaterialCarbon
TiresContinental Grand Prix 5000 S TR
Tire width28 mm
Cockpit
HandlebarStorck RBSU Aerfast.4
TypeOne-piece bar and stem
Integrated stemYes
Widths available380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL)
HeadsetStorck Aerfast.4 integrated headset
Saddle & seatpost
SaddleFizik Vento Argo R5
SeatpostStorck Aerfast.4 Carbon
MaterialCarbon
Bar tapeStorck Microfibre
NotesBlack

Ownership checklist

0 of 1 known checks pass, 3 not published by Storck. Why these checks

  • ✕

    Threaded bottom bracket

    Press-fit, 41 mm bearing bore x 86.5 mm

  • ?

    UDH derailleur hanger

  • ?

    Standard 12×142 mm rear axle

  • ?

    Works with mechanical shifting

Aerfast.4 Red Edition geometry

Storck Aerfast.4 Red Edition geometry
XSSMLXLXXL
Rider height min152 cm5′0″164 cm5′5″170 cm5′7″176 cm5′9″182 cm6′0″188 cm6′2″
Rider height max166 cm5′5″172 cm5′8″178 cm5′10″184 cm6′0″190 cm6′3″—
Stack482 mm19″500 mm19.7″522 mm20.6″538 mm21.2″562 mm22.1″576 mm22.7″
Reach362.5 mm14.3″377 mm14.8″390 mm15.4″400 mm15.7″403 mm15.9″418 mm16.5″
Seat tube angle73°73°73°73°73°73°
Head tube angle70°71°72°———
Head tube length85 mm3.3″100 mm3.9″115 mm4.5″130 mm5.1″155 mm6.1″170 mm6.7″
Effective top tube510 mm20.1″530 mm20.9″550 mm21.7″565 mm22.2″575 mm22.6″595 mm23.4″
Seat tube length458 mm18″483 mm19″508 mm20″531 mm20.9″558 mm22″583 mm23″
Chainstay410 mm16.1″410 mm16.1″410 mm16.1″410 mm16.1″410 mm16.1″410 mm16.1″
Crank length170 mm6.7″170 mm6.7″172.5 mm6.8″172.5 mm6.8″175 mm6.9″175 mm6.9″
Stem length90 mm3.5″100 mm3.9″100 mm3.9″100 mm3.9″110 mm4.3″120 mm4.7″
Handlebar width380 mm15″400 mm15.7″420 mm16.5″420 mm16.5″420 mm16.5″440 mm17.3″

Side view

Drawn to scale (how to read it).

Storck Aerfast.4 Red Edition · M

How the geometry rides

The Aerfast.4 Red Edition in size M against the middle size of 73 other bikes: tendencies from geometry, not a ride review (how to read this).

  • Chainstay410 mm16.1″

    shortestlonger than 63% of 73 bikeslongest

Compare on the stack & reach chart

Good to know

  • Aerodynamics

    TOUR measured the Aerfast.4 Pro Disc at 201 W at 45 km/h and the cheaper Comp Disc at 202 W; TOUR found the carbon seatpost harsh.

    Source

  • Fit

    Storck's size guide gives rider heights of 152-166 cm (XS), 164-172 (S), 170-178 (M), 176-184 (L), 182-190 (XL) and from 188 cm (XXL). Its geometry table leaves the head angle blank for L-XXL.

    Source

  • History

    The Aerfast.4 appeared in 2021, developed with Swiss Side, and Storck has since replaced it with the Aerfast.5 while still selling the Aerfast.4; the 100-bike Final Edition marks the end of the series.

    Source

  • Versions

    Velomotion describes four Aerfast.4 frame classes: Platinum (the top frame, offered only with Dura-Ace, Ultegra Di2, Red or Force), Pro, Comp and Red, the latter a special model exclusively with SRAM Red. Storck publishes the same geometry for all of them.

    Source

Aerfast.4 Red Edition FAQ

Is the Storck Aerfast.4 Red Edition UCI legal?+

Yes. The Storck Aerfast.4 Red Edition is UCI legal, so it can be raced in UCI-sanctioned road races.

How much does the Storck Aerfast.4 Red Edition cost?+

Manufacturer prices (MSRP): €7,299 across 1 listed build: Aerfast.4 Red Edition Red eTap AXS D1.

How much does the Storck Aerfast.4 Red Edition weigh?+

The frame weighs 950 g (33.5 oz) (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). The frameset weighs 1,900 g (4.19 lb).

What sizes does the Storck Aerfast.4 Red Edition come in?+

6 sizes: XS, S, M, L, XL and XXL. The manufacturer recommends them for riders from 152 cm (5′0″) to 190 cm (6′3″).

What is the tire clearance of the Storck Aerfast.4 Red Edition?+

Up to 28 mm tires.

Which groupsets are compatible with the Storck Aerfast.4 Red Edition?+

Bottom bracket: Press-fit, 41 mm bearing bore x 86.5 mm.

What builds of the Storck Aerfast.4 Red Edition are available?+

Aerfast.4 Red Edition Red eTap AXS D1: SRAM Red eTap AXS D1.

Is the Storck Aerfast.4 Red Edition aerodynamic?+

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 (Wind tunnel)

Sources

Storck Aerfast.4 Red Edition data last updated · How the data is checked ·