Hongfu FM279

NOT published. The maker's page (HongFu Sports Equipment / Shenzhen Hongfu Sports Goods Co., Ltd) lists the frame only: 'Full carbon Gravel Disc Frame FM279', '2018 Gravel Disc Frame HF-FM279, Model(Frame): HF-FM279, Material: Toray T800, Weave: UD, Fork: Axle M15*p1.5/M12-p1.5, Frame: Axle M12, Disc brake: Shimano Flat Mount, Size: 50/52/54/56/58cm, Suitable Tire: disc brake 700C*42mm, BB: BB86/BSA'. No handlebar, stem, spacer, top-cap or seatpost details are given and whether a bar/stem is included is not stated (integrated_cockpit left null; the frame photo shows a conventional round steerer with external cable ports, so a normal stem and bar would be expected). Headset, from the geometry drawing only: 'head set: FSA-NO.42ACB, UP 1-1/8", bottom 1.5"' (tapered steerer, 1-1/8 in upper, 1.5 in lower). Fork: full-carbon disc fork, length (F in the drawing) 400 mm axle-to-crown, offset (OT) 45 mm, all sizes; the fork axle spec 'M15*p1.5/M12-p1.5' reads as a 15 mm or 12 mm thru-axle thread option, axle widths not stated. Seatpost diameter, length and offset are NOT published.

table captioned 'FM279-Cycle cross' frame data table, units mm and degrees; upscaled 3x to read). The maker files the bike under Gravel bike and titles it 'Gravel Disc Frame', while the drawing calls it 'Cycle cross' - category recorded as gravel per the maker's listing. STACK DATUM: Stack is drawn from the BB centre vertically to the horizontal through the top of the head tube and Reach horizontally from the BB vertical to the head tube top centre - the usual convention. INTERNAL CONSISTENCY: sqrt(FC^2 - drop^2) + sqrt(RC^2 - drop^2) reproduces the published wheelbase to within 0.1 mm on sizes 500, 520, 560 and 580, but NOT on 540 (published 1020, computed 1015.2) or 600 (published 1042.5, computed 1047.0); the cells were re-read at 3x and are as printed (540: FC 597.7, WB 1020; 600: FC 629.4, WB 1042.5), so this is a maker inconsistency of about 5 mm on those two rows, recorded as published and not smoothed. Note also that the 560 wheelbase (1018.1) is shorter than the 540 (1020) as printed. Size names: the table has six sizes 500-600; the text says 'Size: 50/52/54/56/58cm' but the weight list also includes 60cm, so six sizes are recorded with size_label carrying both forms. Standover and trail are NOT published (left null; do not import derived values). Weight per size (frame, published): 50cm 1070+-40 g, 52cm 1090+-40 g, 54cm 1110+-40 g, 56cm 1155+-40 g, 58cm 1165+-40 g, 60cm 1190+-40 g. Model year: the description opens '2018 Gravel Disc Frame HF-FM279'; the page record was published 2022-04-13 and the og:url points at /products/gravelbike/17.html, the article link at /case/17.html, all the same record. The gravel category listing on the maker's site (http://www.hongfu-bikes.com/products/gravelbike/) has three entries: this FM279 and two FM188 pages; the maker's Download section holds only two 2016 catalogue PDFs (hf2016_a.pdf, hf2016_b.pdf), not fetched. No aggregator was consulted.