WinspaceT1550
Winspace's aero race frame and its best-selling model, sold direct from Hong Kong-based Winspace with warehouses in China, the EU and the US. The second generation keeps the aggressive race geometry but adds about 10 mm of head tube on average, and Winspace claims it is 50 g lighter (828 g, size M, unpainted) and stiffer at the rear triangle, bottom bracket and head tube than the first. It has a threaded T47 bottom bracket, a 1.5 in ACR headset for fully hidden cables, room for 32 mm tyres, and works with mechanical or electronic groupsets. Complete bikes come with the one-piece Zero SL cockpit and Lún Hyper 3 carbon wheels.
- From
- $4,849$4,849$4,849
- Builds
- 3
- Sizes
- 5
- Frame weight
- 828 g29.2 oz
Design sketch, generated from the manufacturer's photo
Our verdict
Overall
out of 100, average of 7 categories
A budget-friendly route to a proper aero race frame: threaded T47, mechanical or electronic shifting, 32 mm tyre room and a one-piece cockpit on the complete bikes, at a fraction of big-brand prices. You give up published aero data, a long warranty and much choice in builds, and you buy direct with long lead times.
Scored Oct 2026
- + Affordable way in
- + Light
- + 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
- 80/100
- Frame
- 74/100
- Components
- 70/100
- Fit
- 70/100
- Practicality
- 72/100
- Price
- 95/100
- Weight
- 82/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Sizes and adjustment range
Travel, standard parts, servicing
From the cheapest complete-bike MSRP
From the lightest claimed weight (7.7 kg, size M)
Bike duel
Reviews
2 independent reviews of the Winspace T1550.
- ▶ Video
- ▶ Video
Road Life
First Impressions of Riding a Winspace Aero Road Bike: Secdon Gen T1550 Shimano105 Di2 HyperTested: 105 Di2
Frame & platform
Frame & fork
- Frame material
- Carbon (Toray T1000 and T800; the complete-bike pages list T800/T1000/M46)
- Fork material
- Carbon (Winspace T1550 fork)
- Frame weight
- 828 g29.2 oz
- Weight measured on
- Frame, size M, unpainted (±35 g). The complete-bike pages give about 855 g for a painted size M frame.
- Frame sizes
- XS (440), S (470), M (490), L (520), XL (550)
- Colours
- Flavoured Black, Retro Blue, Black and White, Silver and White, Panda, Silver Red, Vuelta Tribute, Turbulent Blue, Tropical Green, 2025 Team Edition, Black Viper, Chameleon White, Cosmic Purple, Carnival, Neon, Blue Silk, Stardust (frameset); complete bikes also list Clover
- UCI frame approval
- Winspace states the T1550 Gen 2 frameset is UCI approved. The UCI list (version 2026.10.02) has a 'T1550' frame and fork approved 27 Sep 2017 (sizes 410-550, code WINS-T15-RD) and no separate entry for the second generation.
Compatibility & standards
- Brake type
- Disc, flat mount
- Wheel size
- 700c
- Max tire width
- 32 mm
- Bottom bracket standard
- T47 threaded (internal, symmetric 85.5 mm)
- Front axle
- 12x100 thru-axle
- Rear axle
- 12x142 thru-axle
- Drivetrain compatibility
- Mechanical and electronic: Shimano Di2, SRAM eTap/AXS and Campagnolo EPS routing
- Mechanical shifting possible
- Yes
- Front derailleur mount
- Braze-on
- Cable routing
- Fully internal through a 1.5 in ACR (Aerodynamic Cable Routing) headset
Fit & adjustability
- Cockpit
- One-piece carbon bar and stem (Winspace Zero SL) on the complete bikes; the frameset comes without a cockpit
- Seatpost type
- Proprietary carbon aero seatpost (Winspace S23 VCLS), 0 or 15 mm setback (0 mm on XS-S, 15 mm on M-XL in the geometry chart)
- Fit notes
- Five sizes. Compared with the first T1550 the head tubes are about 10 mm longer on average and the stack-to-reach ratio is 1.40 or more. The Zero SL one-piece cockpit is sold in 380, 400 and 420 mm widths with 85 to 135 mm stems ($290 on its own); the complete-bike pages don't say which size is fitted.
Aerodynamics
- Manufacturer aero claims
- Winspace publishes no drag figures. It says the fully hidden ACR cable routing lowers drag.
Travel, maintenance & warranty
- Headset bearings
- 1.5 in (No.55R), ACR integrated headset included
- Derailleur hanger
- Direct-mount derailleur hanger (a spare comes with complete bikes)
- Proprietary parts
- Aero seatpost, ACR headset and Zero SL cockpit
- Frame warranty
- 3 years on the frameset from arrival at the original buyer (wheelsets 2 years); not transferable
- Sold via
- Direct online from Winspace (shipped from China, EU or US warehouses) and through authorized dealers
Photos
Design sketches
Builds & components
Highlighted rows differ between builds. Green marks the best value.
T1550 Gen2 Ultegra Di2 | T1550 Gen2 105 Di2 | T1550 Gen 2 frameset | |
|---|---|---|---|
| Overview | |||
| Price (MSRP) | $4,849$4,849$4,849 | $4,199$4,199$4,199 | $1,900$1,900$1,900 |
| Weight | 7.7 kg17 lb | 7.9 kg17.4 lb | — |
| Weight measured on size | M | M | — |
| Type | Complete bike | Complete bike | Frameset |
| Notes | Winspace's weight is about 7.7 kg in size M without pedals. Sold in USD only; shipped from the China, EU or US warehouse, plus a $100 complete-bike shipping fee outside Asia. Bikes from the EU warehouse may come with an 11-30 cassette, Shimano SM-RT10 rotors, a Selle Italia Novus Boost saddle and 28 mm Michelin Power Cup tyres. Winspace says all cranksets currently ship with 52/36 chainrings. | Winspace's weight is about 7.9 kg in size M without pedals. Sold in USD only; shipped from the China, EU or US warehouse, plus a $100 complete-bike shipping fee outside Asia. The wheels are listed as 'Lún HYPER 3 D45 Carbon'. Bikes from the EU warehouse come with a Selle Italia Novus Boost saddle and 28 mm Michelin Power Cup tyres. | Frame, fork, seatpost, headset, Di2 cable stoppers and direct-mount derailleur hanger; no cockpit. The shop price is $1,900, while the specification text on the same page still gives a retail price of $1,780 (and road.cc quoted £1,350 at launch). Winspace also lists a 'T1550 Gen2 Bundle' at a regular $2,070, on sale for $1,900, without saying what it adds. |
| Drivetrain | |||
| Groupset | Shimano Ultegra Di2 R8100 | Shimano 105 Di2 R7100 | — |
| Launched | 2021 · current generation | 2022 · current generation | — |
| Speeds | 12-speed | 12-speed | — |
| Electronic | Yes | Yes | — |
| Drivetrain | 2x | 2x | — |
| Shifters | Shimano Ultegra Di2 ST-R8170 | Shimano 105 Di2 ST-R7170 | — |
| Crankset | Shimano Ultegra R8100 | Shimano 105 R7100 | — |
| Chainrings | 52/36 | 50/34 | — |
| Bottom bracket | Token T47 | Token T47 | — |
| Standard | T47, 85.5 mm | T47, 85.5 mm | — |
| Bearings | Steel | — | — |
| Front derailleur | Shimano Ultegra Di2 R8150 | Shimano 105 Di2 R7150 | — |
| Rear derailleur | Shimano Ultegra Di2 R8150 | Shimano 105 Di2 R7150 | — |
| Cassette | Shimano Ultegra R8100 | Shimano 105 R7101 | — |
| Range | 11-34 | 11-34 | — |
| Speeds | 12-speed | 12-speed | — |
| Chain | Shimano CN-M8100 | SUMC | — |
| Brakes | |||
| Brake calipers | Shimano Ultegra hydraulic disc | Shimano 105 hydraulic disc | — |
| Rotors | Shimano RT-CL800 | Shimano RT64 | — |
| Front rotor | 160 mm | 160 mm | — |
| Rear rotor | 140 mm | 140 mm | — |
| Mount | Center Lock | — | — |
| Wheels & tires | |||
| Wheelset | Lún Hyper 3 | Lún Hyper 3 | — |
| Material | Carbon | Carbon | — |
| Tires | Michelin Power Cup | Continental Grand Prix | — |
| Tire width | — | 28 mm | — |
| Cockpit | |||
| Handlebar | Winspace Zero SL | Winspace Zero SL | — |
| Type | One-piece bar and stem | One-piece bar and stem | — |
| Integrated stem | Yes | Yes | — |
| Widths available | 380, 400 or 420 mm, with 85 to 135 mm stem (sold separately in these sizes; stock size not stated) | 380, 400 or 420 mm, with 85 to 135 mm stem (sold separately in these sizes; stock size not stated) | — |
| Cable routing | Fully internal through the ACR headset | Fully internal through the ACR headset | — |
| Material | Carbon | Carbon | — |
| Saddle & seatpost | |||
| Saddle | Selle Italia SLR Boost Superflow | Selle Italia Novus Boost Evo X-Cross Superflow | — |
| Seatpost | Winspace S23 VCLS | Winspace S23 VCLS | Winspace S23 VCLS |
| Offset / setback | 0 or 15 mm setback | 0 or 15 mm setback | 0 or 15 mm setback |
| Material | Carbon | Carbon | Carbon |
T1550 price & value
Building up the T1550 Gen 2 frameset
Included: Seatpost.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Handlebar, Saddle, Pedals.
Ownership checklist
3 of 4 known checks pass. Why these checks
- ✓
Threaded bottom bracket
T47 threaded (internal, symmetric 85.5 mm)
- ✕
UDH derailleur hanger
Direct-mount derailleur hanger (a spare comes with complete bikes)
- ✓
Standard 12×142 mm rear axle
12x142 thru-axle
- ✓
Works with mechanical shifting
T1550 geometry
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Rider height min | 152 cm5′0″ | 162 cm5′4″ | 168 cm5′6″ | 175 cm5′9″ | 182 cm6′0″ |
| Rider height max | 165 cm5′5″ | 172 cm5′8″ | 178 cm5′10″ | 185 cm6′1″ | 192 cm6′4″ |
| Stack | 504.7 mm19.9″ | 521.8 mm20.5″ | 534.9 mm21.1″ | 560.4 mm22.1″ | 585.7 mm23.1″ |
| Reach | 363 mm14.3″ | 372 mm14.6″ | 381 mm15″ | 388 mm15.3″ | 397 mm15.6″ |
| Seat tube angle | 75.1° | 74.3° | 74° | 73.5° | 73° |
| Head tube angle | 70.7° | 71.5° | 72° | 72.5° | 72.9° |
| Head tube length | 105 mm4.1″ | 120 mm4.7″ | 130 mm5.1″ | 155 mm6.1″ | 180 mm7.1″ |
| Effective top tube | 497.3 mm19.6″ | 518.7 mm20.4″ | 534.4 mm21″ | 554 mm21.8″ | 576.1 mm22.7″ |
| Seat tube length | 440 mm17.3″ | 470 mm18.5″ | 490 mm19.3″ | 520 mm20.5″ | 550 mm21.7″ |
| Chainstay | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ | 408 mm16.1″ |
| Wheelbase | 969.1 mm38.2″ | 976.8 mm38.5″ | 979.3 mm38.6″ | 989.7 mm39″ | 1,002.7 mm39.5″ |
| BB drop | 72 mm2.8″ | 72 mm2.8″ | 72 mm2.8″ | 72 mm2.8″ | 72 mm2.8″ |
| BB height | 271 mm10.7″ | 271 mm10.7″ | 271 mm10.7″ | 271 mm10.7″ | 271 mm10.7″ |
| Fork length | 370 mm14.6″ | 370 mm14.6″ | 370 mm14.6″ | 370 mm14.6″ | 370 mm14.6″ |
| Fork offset | 50 mm2″ | 50 mm2″ | 44 mm1.7″ | 44 mm1.7″ | 44 mm1.7″ |
| Trail | 65 mm2.6″ | 60.3 mm2.4″ | 63.3 mm2.5″ | 60.3 mm2.4″ | 57.7 mm2.3″ |
| Standover | 731 mm28.8″ | 757 mm29.8″ | 775 mm30.5″ | 803 mm31.6″ | 832 mm32.8″ |
| Wheel size | 700c | 700c | 700c | 700c | 700c |
Side view
Drawn to scale (how to read it).
How the geometry rides
The T1550 in size M against the middle size of 29 other bikes: tendencies from geometry, not a ride review (how to read this).
- Trail63.3 mm2.5″
shortestlonger than 97% of 29 bikeslongest
Longer trail than most: steering is steadier and less twitchy on the extensions.
- Wheelbase979.3 mm38.6″
shortestlonger than 23% of 65 bikeslongest
Short wheelbase: tends to feel more agile in corners and less planted on long straights.
- Chainstay408 mm16.1″
shortestlonger than 27% of 73 bikeslongest
Good to know
Design
The frame is moulded in one piece from Toray T1000 and T800 carbon. Road.cc describes the 'T-Tail' rear end, where a flat section at the top of the one-piece seatstay meets the seat tube, and the integrated fork crown.
SourceFit
Rider heights come from Winspace's general road-bike size guide, not a T1550-specific chart. The geometry chart lists the seatpost length as 320 mm (XS-S) or 360 mm (M-XL).
SourceHistory
Winspace's frameset page went live in early January 2025 and road.cc covered the second-generation frame on 5 January 2025.
SourceVersions
Winspace lists the changes from the first-generation T1550: 50 g lighter (about 6%), rear triangle 36% stiffer (19.6 N/mm), bottom bracket 7% stiffer (80 N/mm), head tube 33% stiffer (108 N/mm), head tubes about 10 mm longer on average and a stack-to-reach ratio raised to 1.40 or more (size M).
Source
T1550 FAQ
Is the Winspace T1550 UCI legal?+
Yes. The Winspace T1550 is UCI legal, so it can be raced in UCI-sanctioned road races.
How much does the Winspace T1550 cost?+
Manufacturer prices (MSRP): $1,900–$4,849 across 3 listed builds and framesets: T1550 Gen2 Ultegra Di2, T1550 Gen2 105 Di2 and T1550 Gen 2 frameset.
How much does the Winspace T1550 weigh?+
The lightest complete build listed (T1550 Gen2 Ultegra Di2) weighs 7.7 kg (17 lb) in size M. The frame weighs 828 g (29.2 oz) (Frame, size M, unpainted (±35 g). The complete-bike pages give about 855 g for a painted size M frame.).
What sizes does the Winspace T1550 come in?+
5 sizes: XS, S, M, L and XL. The manufacturer recommends them for riders from 152 cm (5′0″) to 192 cm (6′4″).
What is the tire clearance of the Winspace T1550?+
Up to 32 mm tires on 700c wheels.
Which groupsets are compatible with the Winspace T1550?+
Drivetrain compatibility: Mechanical and electronic: Shimano Di2, SRAM eTap/AXS and Campagnolo EPS routing. Mechanical shifting can be fitted. Bottom bracket: T47 threaded (internal, symmetric 85.5 mm).
What builds of the Winspace T1550 are available?+
T1550 Gen2 Ultegra Di2: Shimano Ultegra Di2 R8100; T1550 Gen2 105 Di2: Shimano 105 Di2 R7100.
What warranty does the Winspace T1550 frame have?+
3 years on the frameset from arrival at the original buyer (wheelsets 2 years); not transferable
Is the Winspace T1550 aerodynamic?+
Winspace publishes no drag figures. It says the fully hidden ACR cable routing lowers drag.
Sources
- https://www.winspace.cc/products/t15502ndgen
- https://www.winspace.cc/products/t1550-gen2-ultegra-di2
- https://www.winspace.cc/products/t1550-gen2-105-di2
- https://www.winspace.cc/products/t1550-2nd-gen-bundle
- https://www.winspace.cc/products/winspace-zero-sl-integrated-bar-and-stem-for-t1550
- https://cdn.shopify.com/s/files/1/0912/6101/0215/files/Posters-8_bb510379-90e4-4a8f-81fd-18809ee22f24.jpg?v=1752486351
- https://cdn.shopify.com/s/files/1/0912/6101/0215/files/Winspace_Road_Height_Guide.jpg?v=1752486430
- https://cdn.shopify.com/s/files/1/0912/6101/0215/files/T1550_Upgrades1.jpg?v=1752485219
- https://www.winspace.cc/pages/warranty
- https://www.winspace.cc/pages/about-us
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
- https://road.cc/content/tech-news/aero-bike-thats-quarter-price-factor-ostro-vam-311909
Winspace T1550 data last updated · How the data is checked ·