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 Most makers do not publish it, so I assume 10 mm and add 6 mm to the band beside every answer.
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
Airwolf YFG001
Gravel · 5 sizes
The YFG001 on airwolfcarbonbike.com
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
- Airwolf YFG001 · Gravel · 5 sizes
- Geometry
- airwolfcarbonbike.com, fetched 22 Oct 2026, read off the maker's chart, re-checked, no differences
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 10 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 · 879 bikes, 79 makes, 4,979 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)not published | Standover (mm)not published |
|---|---|---|---|---|---|---|---|---|
| 47cm | 548.4 | 360.1 | 70.25 | 74.5 | 120 | 422 | ||
| 50cm | 563.5 | 367.8 | 70.5 | 74 | 135 | 422 | ||
| 53cm | 578.4 | 374.4 | 70.75 | 73.75 | 155 | 422 | ||
| 55cm | 593.5 | 382 | 71.75 | 73.5 | 165 | 422 | ||
| 57.5cm | 608.8 | 389.7 | 72 | 73 | 180 | 422 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 53cm 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. A dashed tube is a number the maker left out (est.).
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.
Frame facts
read off the maker's page: airwolfcarbonbike.com- Tyre clearance
- 45 mm
- Bottom bracket
- BSA
- Axles and brakes
- not published
- UDH
- not published
- Seatpost
- not published
- Frame weight
- not published
In the maker's words
Kept whole, as I read it off airwolfcarbonbike.com.The description shows Airwolf's "New ergonomic bar/stem" (one-piece; drop 135mm, reach 85mm, widths 380/400/420/440mm, stem lengths 90/100/110..., 355 g at 400x100mm), spacers CS001 and a two-type aero seatpost (S1 offset 25mm, S2 0); no per-size stock bar or stem and no stem angle printed.
Cockpit and seatpost, in the maker's words · 44 words
The description shows Airwolf's "New ergonomic bar/stem" (one-piece; drop 135mm, reach 85mm, widths 380/400/420/440mm, stem lengths 90/100/110..., 355 g at 400x100mm), spacers CS001 and a two-type aero seatpost (S1 offset 25mm, S2 0); no per-size stock bar or stem and no stem angle printed.
SOURCE: airwolfcarbonbike.com is Airwolf's own WordPress store (the other Airwolf files cite it). Source: image_table (maker's own store airwolfcarbonbike.com; the description image
How I read the maker's table
the geometry is one image in the product description, read by eye. Page "AIRWOLF 2024 New Grevil Disc Road Frame ... Gravel Frames Max Tire 700*45C Flat Mount Disc Brake Thru Axle" (model_year 2024 from the title); the chart is headed "YFG001 Frame Chart" and the description has a "GREVIL YFG001 ROAD FRAME" banner (T1100 Toray, BSA bottom bracket, 700*45C). FOR CARL: this chart reproduces Pinarello's Grevil F chart (pinarello-grevil-f-2023): stack, reach, top tube, head and seat angles, head tube, BB drop, fork offset and seat tube agree on all five sizes; only the chainstay (422 on every size here, Pinarello 422/422/422/425/425) and the last label (57.5cm against 57) differ, and the page carries an image named "pinarello-grevil-carbon". Kept as Airwolf's own frame and published chart, the likeness named here. Columns as printed: CE "seat tube center - end" 410/445/475/500/520 (recorded as seat_tube_length, as the Pinarello file records the same numbers) and CC "seat tube center - center" 470/500/530/550/575 (the labels look swapped, since the centre-to-end length is the shorter; not in the schema); L "top tube center - center", drawn horizontal in the diagram and recorded as top_tube_effective, though it runs 6 to 8 mm longer than the table's own stack, reach and seat angle give (47cm: 360.1 + 548.4 / tan 74.5 = 512.2 against 520), so it is probably measured to tube centres as labelled; A seat tube angle; B headtube angle; P chainstay; T headtube; D BB drop; R fork rake; G fork height 395 (not in the schema); REACH; STACK. No trail, standover or wheelbase printed.
Source: image_table (maker's own store airwolfcarbonbike.com; the description image https://airwolfcarbonbike.com/wp-content/uploads/2024/10/Gravel-Bike-Frameset.jpg, 1000x1070 px, "YFG001 Frame Chart"; read by eye, image NOT stored)
