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 Most makers do not publish it, so I assume 15 mm and add 6 mm to the band, which on its own is enough to hold an answer at "probably" rather than "fits".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
XMCS GRT
Gravel · 4 sizes
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This is the bike I ride
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- Bike
- XMCS GRT · Gravel · 4 sizes · integrated cockpit
- Geometry
- xmcarbonspeed.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.The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The L 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.XMCS GR AEROVendor-listedstem -8 · reach 72 · drop 105 · clamp 36.4 · lengths 80-140 · widths 360-420
XMCS GR RISERVendor-listedstem -8 · reach 72 · drop 105 · clamp 36.4 · rise +25 · lengths 80-140 · widths 360-420
In the maker's words
Kept whole, as I read it off xmcarbonspeed.cc.SOLD AS A FRAMESET, "NO HANDLEBAR" BY DEFAULT.
Cockpit and seatpost, in the maker's words · 348 words
SOLD AS A FRAMESET, "NO HANDLEBAR" BY DEFAULT. The order form defaults to "No handlebar" (headset and thru axles included, no stem, no bar) and offers two optional XMCS one-piece integrated bar/stems as add-ons, "With GR AERO Handlebar" or "With GR RISER Handlebar", each +USD 250; the page says "For the Riser handlebars, the size of 42 is unavailable now". Both bars are published only as image charts on the product page (71429e9648.png = GR:AERO, 568026b6d6.png = GR:RISER), re-read from those charts on 4 September 2026, and share one geometry apart from the riser's uplift. Neither chart publishes spacer heights, the maximum spacer stack, the top cap or headset cover height, the steerer diameter, or whether a conventional stem can be fitted, and no per-size default width or length is given, so stock_stem_length and stock_bar_width are null. Seatpost: order option "Zero Offset" or "15mm setback"; post shape, diameter and length not published. Extras offered: spare UDH hanger (USD 10 each), titanium computer mount (USD 30). (1) GR AERO ("With GR AERO Handlebar" order option at +USD 250; chart 71429e9648.png): widths 36/38/40/42 = hood-to-hood (W1) 360/380/400/420 mm, drop-to-drop (W2) 450/470/490/510 mm; bar reach 72 mm; drop 105 mm; drop flare 16.5 deg; stem angle -8 deg (drawn as 82 deg to the steerer on a 72.5 deg head angle); stem clamp "Stack" 36.4 mm; stem lengths 80/90/100/110/120/130/140 mm (any width with any length as far as the chart shows). (2) GR RISER ("With GR RISER Handlebar" order option at +USD 250; chart 568026b6d6.png; size 42 unavailable at the time of collection): widths 36/38/40/42 = hood-to-hood (W1) 360/380/400/420 mm, drop-to-drop (W2) 450/470/490/510 mm; bar reach 72 mm; drop 105 mm; drop flare 16.5 deg; uplift 25 mm (the chart's "Uplift 25MM", the hoods and tops rising 25 mm above the clamp plane); stem angle -8 deg (drawn as 82 deg to the steerer on a 72.5 deg head angle); stem clamp "Stack" 36.4 mm; stem lengths 80/90/100/110/120/130/140 mm (any width with any length as far as the chart shows); the same geometry as the GR AERO apart from the uplift.
SOURCE: the maker's own web store (xmcarbonspeed.cc, a UEESHOP storefront run by Xiamen Carbon Speed / XMCS). Source: image_table (maker's own store page publishes the chart only as a PNG
How I read the maker's table
The geometry is published only as a PNG chart headed "Frameset Geometry" (1049 x 707 px) in the Description tab; every number here was read from that image by the collector. STACK DATUM: drawn vertically from the BB centre to a horizontal line through the top of the head tube, reach horizontally from the BB centre to the same point (the usual convention). Self-check: recomputing stack from head tube length + fork length, head angle, fork offset and BB drop with zero lower headset stack reproduces every published stack within 1 mm, and front centre and wheelbase recompute within 1 mm, so the chart is internally consistent. SIZES: S / M / L / XL only, no cm labels and no rider height chart on the page. MODEL YEAR: none stated anywhere on the page. The chart image sits on the CDN under a path dated 2026-07-01 and the product photos under 2026-07-07 (UEESHOP path convention YYMM/DD), paint options 2026-08-18 and 2026-08-29, so this is a mid-2026 listing. The page warns: "Current frame takes 1x 46T only, we are updating the molds fitting for 1x48T, or 50T (some spacers needed), if you don't take 46T, please wait for updated version. Updated XL size can be ordered now, updated sizes S/M/L won't be available until October." The maker does not say whether the chart describes the current or the updated mould; re-check the chart after October 2026. OTHER FRAME FACTS: one-piece monocoque, T1000 / 40T / 30T carbon mix plus SCM; BB T47-85.5; max tyre 700 x 57C; UDH hanger; system weight limit 130 kg; 5 year warranty; frame weight unpainted incl. hangers and bolts S 1025 / M 1045 / L 1080 / XL 1110 g (+/-30 g); fork 455 g (+/-10 g) unpainted; price USD 1490 (list USD 1989), 30-50 days lead time; paint: UD raw carbon or ten painted options, matte or glossy. Trail is not published (left null). Not used: no aggregator was consulted and Panda Podium was not queried for this file.
Source: image_table (maker's own store page publishes the chart only as a PNG: https://ueeshop.ly200-cdn.com/u_file/UPBC/UPBC678/2607/01/photo/GRTGeometry.png)
