Stack and reach
How high and how far forward the top of the head tube is, from the bottom bracket. They are the two numbers that decide whether a frame can be set up like yours.
BB, or bottom bracket
The axle your cranks turn on, in the middle of the frame. Every number on this site is measured from it, because it is the one point that sits in the same place on every bike.
Headset cover
The little cap on top of the head tube, under your spacers. Most makers do not publish it, so I assume 15 mm and add 6 mm to the band, which on its own is enough to hold an answer at "probably" rather than "fits".
Stem clamp, and its centre
The collar on the steerer that your stem bolts to. I need the middle of it. Where a maker gives only the height, I assume halfway up and say so on the answer.
Steerer
The tube coming up out of the fork. The cover, the spacers and the stem all sit on it, and it is the thing a mechanic cuts to length.
Bar reach
How far forward the hoods sit from the middle of the bar. Two bars on the same stem can put your hands 20 mm apart, which is why I ask.
Setback
How far your saddle sits behind the bottom bracket.
Drop
How much lower your bar is than your saddle.
Rails, and the rail centre
The two rods under your saddle, and the middle of the straight part of them. That midpoint is the point I use, because it is the one you can find with a tape.
The band
How far out I could be, in millimetres, and why. It is a straight sum of everything I had to assume rather than a clever average, so it errs wide on purpose.
wb, stand, trail
Wheelbase, standover and trail: how long the bike is, how high the top tube is where you straddle it, and how steady the steering feels. I show them against your bike, and I leave them out when the maker does not publish them.
est.
Estimated: a number I worked out rather than read off the maker's table. Anything marked this way can move if the maker publishes the real one.
Close Escape closes it. The measuring guide has the pictures. Open the measuring guide
Winspace T1550 Gen 2
Aero road · 5 sizes
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This is the bike I ride
No account is needed to read the table. Report a wrong number · Correct this bike
- Bike
- Winspace T1550 Gen 2 · Aero road · 5 sizes · integrated cockpit
- Geometry
- winspace.cc, fetched 29 Aug 2026, re-checked, no differences
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 15 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 6 September 2026 · 210 bikes, 43 makes, 1,262 sizes in the catalogue
Geometry, every size, from the maker's table
The tinted row is the size drawn beside it. Press a size to draw it.| Size | Stack (mm) | Reach (mm) | Head angle (deg) | Seat angle (deg) | Head tube (mm) | Chainstay (mm) | Wheelbase (mm) | Standover (mm) |
|---|---|---|---|---|---|---|---|---|
| XS | 504.7 | 363 | 70.7 | 75.1 | 105 | 408 | 969.1 | 731 |
| S | 521.8 | 372 | 71.5 | 74.3 | 120 | 408 | 976.8 | 757 |
| M | 534.9 | 381 | 72 | 74 | 130 | 408 | 979.3 | 775 |
| L | 560.4 | 388 | 72.5 | 73.5 | 155 | 408 | 989.7 | 803 |
| XL | 585.7 | 397 | 72.9 | 73 | 180 | 408 | 1002.7 | 832 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The M drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm.
The maker's cockpit
No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.Generic stem and barAssumedNo bar is listed for this frame.
In the maker's words
Kept whole, as I read it off winspace.cc.Winspace sells its frames bar-less or as "bundles" with its own one-piece bars (HYPER Integrated Handlebar, Zero K, Zero SL, HYPER 2 Riser; Adventure Integrated Handlebar for the gravel frames); the frame page lists no per-size stock bar or stem, so stock_stem_length / stock_bar_width are null.
Cockpit and seatpost, in the maker's words · 213 words
Winspace sells its frames bar-less or as "bundles" with its own one-piece bars (HYPER Integrated Handlebar, Zero K, Zero SL, HYPER 2 Riser; Adventure Integrated Handlebar for the gravel frames); the frame page lists no per-size stock bar or stem, so stock_stem_length / stock_bar_width are null. Head tube "NO.55R 1.5in / ACR / STD (headset included)" on the current frames: FSA ACR full-internal routing through a 1-1/2 in upper bearing, which fits Winspace's own ACR-pattern bars and any ACR-compatible stem. Spacer heights, maximum spacer stack and top-cover height are not published on the frame page. T1550 2nd Generation page specification: sizes XS (440mm), S (470mm), M (490mm), L (520mm), XL (550mm); head tube NO.55R 1.5in/ACR/STD (headset included); BB T47 (internal symmetric 85.5 mm); proprietary aero seatpost included (table rows O/P: 320 mm / 0 mm setback on XS and S, 360 mm / 15 mm on M, L, XL); flat mount; brazed-on front derailleur; routing mechanical / Di2 / Campy EPS / SRAM eTap; tyre clearance max 700Cx32C; 12 mm thru-axles F100 / R142; Toray T1000 + T800; frame 828 +/-35 g (M, unpainted); UCI approved; contents frame, fork, seatpost, headset, Di2 cable stoppers, direct-mount hanger; retail USD 1,780. The store also sells the "Winspace Zero SL Integrated Bar and Stem for T1550".
SOURCE: the maker's own store page, "Geometry" tab, one composite image (drawing plus table, 1280x1280 px, white on black, small type, legible at native size) and no HTML table. Source: image_table (maker's own Shopify store, product page "Geometry" tab: one image combining the letter drawing and the table
How I read the maker's table
every number was read from the image by the collector. The stack, top tube, wheelbase and trail rows are printed to two decimals (e.g. stack 504.72, wheelbase 969.11, trail 64.97) and are recorded exactly so; BB Height 271 all sizes; Fork Length 370 all sizes; seatpost 320/320/360/360/360 with setback 0/0/15/15/15; STR 1.39/1.40/1.40/1.44/1.48; no height row on this table (the separate "Winspace Road Height Guide" image was not read). Front centre not published (null). ODDITY AS PRINTED: trail falls to 60.26 on S then rises to 63.28 on M because the rake drops from 50 to 44 mm at M (as on the T1600 and SLC5). Consistency check (mine, not published): with a 350 mm wheel radius the printed head angles and rakes give trail 62.1 / 57.8 / 61.4 / 58.6 / 56.4, i.e. 2.4 to 2.9 mm LESS than the printed Trail(32C) row on every size, which would need a wheel radius of about 358 mm; the maker's basis is not stated beyond "32C", so the row is kept as printed and this is only noted. MODEL YEAR: not stated (Shopify product published 2025-01-02; the previous T1550 generation is a different frame and is not in this file); null. Category aero road (the page: "Born to race ... retains the aggressive geometry"; T-series aero frame). No aggregator consulted.
Source: image_table (maker's own Shopify store, product page "Geometry" tab: one image combining the letter drawing and the table, https://cdn.shopify.com/s/files/1/0912/6101/0215/files/Posters-8_bb510379-90e4-4a8f-81fd-18809ee22f24.jpg (1280x1280, the store's own Shopify file host), followed by the "Winspace Road Height Guide" image; numbers read from the image by the collector, images NOT stored)
