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 Most makers do not publish it, so I assume 15 mm and add 6 mm to the band, which on its own is enough to hold an answer at "probably" rather than "fits".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
Yoeleo R12 DB
Aero road · carbon · 7 sizes
Sign in and add the bike you ride, and this table will say what each size needs for your position.
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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
- Yoeleo R12 DB · Aero road · carbon · 7 sizes · integrated cockpit · seatpost offsets 0 / 15 mm
- Geometry
- yoeleo.com, fetched 28 Aug 2026, re-checked, no differences
- Cockpit
- H9 integrated, the maker's spec
- Solved with
- cover 10 mm (published), max spacers 25 mm (published), stem clamp centre 20 mm (assumed), so every verdict carries ±4 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)not published |
|---|---|---|---|---|---|---|---|---|
| 43 (XXS) | 501.6 | 370.6 | 70.5 | 75 | 100 | 415 | 977 | |
| 47 (XS) | 505 | 375.9 | 71.5 | 74.5 | 100 | 415 | 974.8 | |
| 50 (S) | 520.9 | 378.6 | 72 | 74 | 115 | 415 | 978.3 | |
| 52 (M) | 536.9 | 381 | 72.5 | 73.5 | 130 | 415 | 981.3 | |
| 54 (L) | 550 | 386 | 73 | 73 | 145.7 | 415 | 987.6 | |
| 56 (XL) | 567.2 | 388.2 | 73 | 72.5 | 160 | 415 | 993.2 | |
| 59 (XXL) | 581.6 | 393 | 73 | 72 | 175 | 415 | 1002.4 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 52 (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
What each size is solved on unless you choose another bar on the sheet.Yoeleo H9 integratedStockstem -7 · reach 80 · drop 125 · lengths 90-120 · widths 380-440
In the maker's words
Kept whole, as I read it off yoeleo.com.Option 1 - H9 integrated bar/stem (one-piece): stem 90/100/110/120 mm x width 380/400/420/440 mm (all combinations orderable via the product configurator), stem angle -7 deg, bar reach 80 mm, drop 125 mm.
Cockpit and seatpost, in the maker's words · 170 words
Option 1 - H9 integrated bar/stem (one-piece): stem 90/100/110/120 mm x width 380/400/420/440 mm (all combinations orderable via the product configurator), stem angle -7 deg, bar reach 80 mm, drop 125 mm. Option 2 - ST1 carbon stem + H11 aero bar (two-piece): stem 90/100/110/120 mm x width 360/380/400/420/440 mm, bar reach 64 mm, drop 126 mm; ST1 stem is -10 deg with 30 mm stack height (ST1 spec from https://www.yoeleo.com/products/best-gravel-carbon-handlebar). Option 3 - "Without Handlebar": frameset ships with a bearing cover that accepts a traditional bar for internal cabling. Spacers: the official R12 frameset manual (https://cdn.shopify.com/s/files/1/0094/1142/8410/files/YOELEO-R12-manual-20230421.pdf, page 4-5) shows the supplied headset stack as bearing cover 10 mm + spacers 10 mm + 10 mm + 5 mm (i.e. up to 25 mm of spacers above a 10 mm bearing cover); the manual says "pick the right spacer height to adjust your riding position" but publishes NO explicit maximum spacer height. Product page box contents list "Handlebar Spacer*1" (count differs from manual diagram; unresolved). Top cap height not published.
The identical table (same 7 sizes, same values) is also published on Yoeleo's complete-bike store https://www.yoeleobike.com/products/aero-disc-brake-bike-yoeelo-r12-carbon-bike under "R12 DB Geometry", where the sizes are also given letter labels: XXS/43, XS/47, S/50, M/52, L/54, XL/56, XXL/59. Source: html table
How I read the maker's table
Official rider-height recommendations: 43 = 155-163 cm, 47 = 160-168, 50 = 165-173, 52 = 170-178, 54 = 175-183, 56 = 180-188, 59 = 185-193. Row letters in the official table: A seat tube length, B top tube length, C reach, D stack, E head tube length, F seat tube angle, G head tube angle, H BB drop, I chainstay, J front center, K wheelbase, L fork rake, M fork length (371 mm all sizes). NOT PUBLISHED by Yoeleo (set null): standover, trail, per-size stock stem length and bar width (the buyer picks stem length and bar width freely from the lists in cockpit_options; no size-to-stem default is stated anywhere on the page), max spacer height, headset cap height. Top tube: official label is "TOP TUBE LENGTH(mm)" with no "effective" qualifier; diagram B is drawn horizontal from the head tube top so I recorded it as effective/horizontal - uncertain. DISCREPANCY: the "Product details" block on the same page says "Fork Offset: 45˚" (with a degree symbol, presumably a typo for mm) while the geometry table says FORK RAKE 43 mm for every size; I used the table value 43. Frame details from the page: 1-1/2" straight head tube ("Tapered Steerer Tube: 1 1/8 Top, 1 1/2 Crown" under the fork), BB386, 12x142 rear, 12x100 front, aero seatpost with slider saddle clamp (manual page 6: "Saddle Wedge Slider" moves the saddle fore/aft; minimum seatpost insertion 10 cm), max tyre 32C, frame weight 970-1030 g (47 cm), rider weight limit 110 kg. Yoeleobike.com lists the complete bike as "R12 DB PRO", ready stock 15-3-2024, so the table applies to the 2023-2024-and-later R12 DB generation. A secondary source (geometrygeeks.bike/bike/yoeleo-r12-2023/) serves scrambled numbers to non-JS clients and was NOT used. R11 was not collected; task was satisfied by R12. All values are in mm and degrees as published; no conversions performed.