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 Most makers do not publish it, so I assume 15 mm and add 6 mm to the band, which on its own is enough to hold an answer at "probably" rather than "fits".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
Hongfu FM088
Road · 7 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
- Hongfu FM088 · Road · 7 sizes
- Geometry
- hongfu-bikes.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.| Size | Stack (mm) | Reach (mm) | Head angle (deg) | Seat angle (deg) | Head tube (mm) | Chainstay (mm) | Wheelbase (mm) | Standover (mm)not published |
|---|---|---|---|---|---|---|---|---|
| 450 (45 cm) | 501 | 370 | 71 | 75 | 100 | 410 | 964.4 | |
| 480 (48 cm) | 512 | 374 | 71.5 | 74.5 | 110 | 410 | 967.3 | |
| 500 (50 cm) | 519 | 381 | 72 | 74.5 | 115 | 410 | 972.5 | |
| 520 (52 cm) | 522 | 385.6 | 72.5 | 74 | 118 | 410 | 974.5 | |
| 540 (54 cm) | 543 | 384 | 73 | 73.5 | 140 | 410 | 975 | |
| 560 (56 cm) | 557 | 395 | 73 | 73.5 | 155 | 410 | 990 | |
| 580 (58 cm) | 578 | 398 | 73.5 | 73 | 175 | 410 | 995 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 520 (52 cm) 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.
Frame facts
read from the maker's words, not a table: hongfu-bikes.com- Tyre clearance
- 700c x 28 mm
- Bottom bracket
- not recorded yet
- Axles and brakes
- 12x100 / 12x142
- UDH
- not recorded yet
- Seatpost
- not recorded yet
- Frame weight
- 968 g, size 45cm
In the maker's words
Kept whole, as I read it off hongfu-bikes.com.SOLD AS A FRAMESET by an OEM factory ("I want to inquire"); no bar, stem or seatpost specification on the page, so stock_stem_length and stock_bar_width are null.
Cockpit and seatpost, in the maker's words · 83 words
SOLD AS A FRAMESET by an OEM factory ("I want to inquire"); no bar, stem or seatpost specification on the page, so stock_stem_length and stock_bar_width are null. The drawing notes the headset "head set: FSA-NO.42ACB, UP 1-1/8", botton: 1.5"" (tapered steerer, standard 1 1/8 in stem). Frame: Toray T800, BB86/BSA/PF30, max tyre 700x28C, 142x12 rear and 100x12 front thru-axles, 140 mm rotors (160 mm mount); frame weights 45cm 968, 48cm 982, 50cm 992, 52cm 1002, 54cm 1011, 56cm 1021, 58cm 1036 g (+/-40).
SOURCE: www.hongfu-bikes.com is the maker's own site (HongFu Sports Equipment Co., Ltd / Shenzhen Hongfu Sports Goods Co., Ltd). Source: image_table (the maker's own product page carries the geometry only as one image in the description
How I read the maker's table
The product page names the frame "2018 Disc brake Road Frame, Item: HF-FM088" (hence model_year 2018, the year the maker prints) and lists "Available sizes: 45/48/50/52/54/56/58cm"; the drawing's table uses 450/480/500/520/540/560/580, so labels here are "<table size> (<cm>)", matching the other Hongfu files. TABLE LEGEND (from the labelled drawing): S = seat tube, BB centre along the tube to the top tube junction as drawn; TT = top tube, horizontal (top_tube_effective); SA = seat angle; HT = head tube; HA = head angle; F = fork length 368 every size (not a schema field); OT = fork offset 45; WB = wheelbase; FC = front centre, BB centre to front axle; RC = chainstay 410; G = BB drop (72 on 450-500, 69 on 520-580); Reach and Stack drawn from the BB centre to the head tube top. The size order does not keep reach rising: 520 prints reach 385.6 and 540 prints 384 (with stack 522 then 543); both close their own top tube within 1 mm, so this is the maker's design (the 540 is a taller, steeper front), not a misread. NOT PUBLISHED: standover, trail (null). Bike Insights lists FM088 2021 with sizes 45-58 citing an AliExpress listing (see cross_check); its numbers differ slightly from the maker's drawing. No Panda Podium, Geometry Geeks or 99 Spokes request was made.
Source: image_table (the maker's own product page carries the geometry only as one image in the description: https://www.hongfu-bikes.com/upload/image/20220413/1649850983426113.jpg, 830x648 px, CAD frame drawing + table headed "FM088 frame data table (unit: length mm / angle deg)"; numbers read by eye, image NOT stored)
