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 Most makers do not publish it, so I assume 15 mm and add 6 mm to the band, which on its own is enough to hold an answer at "probably" rather than "fits".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 hands sit than your saddle. On a riser bar I count the bar's rise, so the drop is that much less than it is to the clamp.
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
LightCarbon LCR015-D
Road · 4 sizes
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This is the bike I ride
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- Bike
- LightCarbon LCR015-D · Road · 4 sizes · integrated cockpit
- Geometry
- lightcarbon.com, fetched 20 Oct 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
- 22 October 2026 · 686 bikes, 74 makes, 3,984 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 540 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.LightCarbon HBR11Vendor-listedstem -7 · reach 82 · drop 125 · lengths 90-120 · widths 380-440
Frame facts
read from the maker's words, not a table: lightcarbon.com- Tyre clearance
- not recorded yet
- Bottom bracket
- BB86
- Axles and brakes
- 12x100 / 12x142, flat mount
- UDH
- not recorded yet
- Seatpost
- not recorded yet
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off lightcarbon.com.The page's own specification table, verbatim: Frame: LightCarbon Aero Carbon Road Disc Brake Frame; Material: High modulus T700 + T800 grade carbon fiber; Size: 480, 510, 540, 570; Fork: LightCarbon specific carbon fork, 390+-15g; Handlebar HBR11 Size: 380/400/420/440mm; Stem Length: 90/100/110/120mm; Headtube: Straight 1 1/2" head tube; Weight+-40g: 1080g/48cm 1120g/51cm 1140g/54cm 1170g/57cm; Seatpost length: LightCarbon specific seatpost, 190+-10g; Bottom bracket: BB86; Max tire clearance: 700*28c; Brake mount type: Flat mount Disc brake 140mm; Dropout: Front 12*100mm thru axle Rear 12*142mm thru axle; Groupset: Electronic shifting groupset is recommended (also compatible for mechanical groupset); Test Standard: ISO 4210; Warranty: 2 years.
Cockpit and seatpost, in the maker's words · 100 words
The page's own specification table, verbatim: Frame: LightCarbon Aero Carbon Road Disc Brake Frame; Material: High modulus T700 + T800 grade carbon fiber; Size: 480, 510, 540, 570; Fork: LightCarbon specific carbon fork, 390+-15g; Handlebar HBR11 Size: 380/400/420/440mm; Stem Length: 90/100/110/120mm; Headtube: Straight 1 1/2" head tube; Weight+-40g: 1080g/48cm 1120g/51cm 1140g/54cm 1170g/57cm; Seatpost length: LightCarbon specific seatpost, 190+-10g; Bottom bracket: BB86; Max tire clearance: 700*28c; Brake mount type: Flat mount Disc brake 140mm; Dropout: Front 12*100mm thru axle Rear 12*142mm thru axle; Groupset: Electronic shifting groupset is recommended (also compatible for mechanical groupset); Test Standard: ISO 4210; Warranty: 2 years.
SOURCE: www.lightcarbon.com is LightCarbon's own site (Xiamen LightCarbon Technology Co., Ltd). Source: html table (maker's own product page, a real HTML geometry table with named rows; parsed from the raw HTML, no image used)
How I read the maker's table
the product page "LightCarbon New Aero Carbon Road Disc Brake Frame" (item no. LCR015-D) publishes the geometry as a real HTML table with named rows, parsed from the raw HTML. The same table appears on: p162 (item no. LCR015S-D, https://www.lightcarbon.com/new-lightcarbon-road-disc-frameset_p162.html, 182545 bytes): identical geometry rows. ROW MAPPING: REACH, STACK, WHEELBASE, CHAINSTAY LENGTH, FRONT CENTER, BB DROP, SEAT TUBE ANGLE, HEAD TUBE ANGLE, SEAT TUBE LENGTH, HEAD TUBE LENGTH, FORK RAKE/OFFSET and TRAIL map one to one; "TOP TUBE LENGTH, HORIZONTAL" is top_tube_effective; "BIKE STANDOVER HEIGHT(700C*28C)" is standover (the tyre the maker measured it with is in the row name). Rows not in the schema, kept here: Seatpost Insert Length 200mm / 250mm / 270mm / 280mm; Bb Height 372mm / 372mm / 372mm / 372mm; Fork Length, Full 370mm / 370mm / 370mm / 370mm. Body-height bands are printed per size "for reference only". STACK DATUM: not stated; recorded as the usual head tube top. SIZE LABELS exactly as the geometry table heads its columns (480 / 510 / 540 / 570). Integrated front end: straight 1 1/2 in head tube, HBR11 integrated handlebar 380/400/420/440 mm with stems 90-120 mm (the LCR015S-D stem version takes the HBR05/HBR07 bars). PROBABLE MAKER SLIP: BB HEIGHT prints 372 mm on every size (not a schema field, noted only). A geometry drawing (alt "LightCarbon Aero Road Carbon Bike Frameset LCR015-D Geometry") sits above the HTML table; the HTML table was used. MODEL YEAR: not printed; model_year null. No Panda Podium, Geometry Geeks or 99 Spokes request was made.