Hongfu FM238

SOLD AS A BARE FRAME by an OEM factory (Shenzhen Hongfu Sports Goods Co., Ltd; the page's only call to action is "I want to inquire"); no handlebar, stem or spacer kit is specified, so stock_stem_length and stock_bar_width are null and no stem angle, bar reach/drop, spacer stack or headset-cover height is published. integrated_cockpit is null because the cockpit is the buyer's choice: the spec block says "Compatible hidden cable routing" (the frame accepts a hidden-routing bar/stem) but names none. HEADSET: "FSA NO.55R 1-1/2 in, 1-1/2 in" (1.5 in upper and lower bearings; the HTML spec line spells it "FSA NO.55R1-1/2",1-1/2""). SEATPOST: round 27.2 mm (no post supplied or named; offset not stated; the "Previous" item on the page is the maker's separate "2024 New carbon seatpost utra light weight" listing, not tied to this frame). FORK: fork length (column E) 390 mm axle to crown and fork offset (column F) 45 mm on every size. OTHER SPEC (page and image): material T800/T1000 carbon fibre; tyre size 700C x 32C; disc size 160 mm; BB86 bottom bracket; "Universal derailleur hanger" (page: "Rear hanger: UDH"); sizes "XS, S, M, L, XL available".

OEM carbon frame factory). The product page http://www.hongfu-bikes.com/products/76.html (301 to https; the page also names itself http://www.hongfu-bikes.com/products/roadbike/76.html in og:url and http://www.hongfu-bikes.com/case/76.html in "Url for this article") is titled "2024 All road Carbon bike frame New design FM238", sits in the site's "Road bike" category, was published 2024-09-16 17:23:03 and has NO HTML table (zero <table> elements): the whole geometry is the embedded catalogue image named above; the other embedded image (https://www.hongfu-bikes.com/upload/image/20240916/1726478373384909.jpg, alt "FM238.JPG") is a photograph of the frameset with no data. MODEL YEAR: the geometry image itself is headed "2023 NEW All road frame" while the page title and the page's spec block say "2024"; recorded as 2023 from the chart that carries the numbers (the page is a 2024 re-listing of the same frame with the same chart). CATEGORY: the maker's own wording is "All road" ("ALL ROAD FM238" on the chart), recorded as all-road even though the site files it under Road bike. TABLE LEGEND (columns exactly as printed, mapped from the geometry diagram on the same image): SIZE = XS / S / M / L / XL; A = head tube length (drawn along the head tube); B = top tube, drawn HORIZONTAL from the extended seat tube axis to the head tube axis at the height of the head tube top, i.e. effective top tube; C = head tube angle (deg, printed with a degree sign); D = seat tube angle (deg, printed with a degree sign), drawn at the BB between the horizontal and the seat tube axis, 73.5 on every size; E = fork length, axle to crown along the steering axis (390 all sizes, no schema field, recorded in cockpit_options); F = fork offset (45 all sizes); G = seat tube length, BB centre to top of seat tube; H = BB drop (73 all sizes); STACK and REACH as drawn from the BB centre to the TOP OF THE HEAD TUBE (no headset cap); RC = rear centre = chainstay (415 all sizes); FC = front centre; WB = wheelbase. STACK DATUM: top of head tube; the collector's check bb_drop + (E + A) x sin(C) - F x cos(C) reproduces the printed STACK within 0.4 mm on every size (547.1 / 548.1 / 567.9 / 589.6 / 610.7 against 547 / 548 / 568 / 590 / 611), which also confirms the XS and S stacks really are only 1 mm apart (the S has a 0.5 deg slacker head angle). SEAT ANGLE CONVENTION: the column is labelled only "D" and the diagram draws it at the BB along the seat tube axis; the maker never says effective or actual, hence null. The seat tube is drawn straight and the 27.2 mm post sits on its axis, so actual and effective coincide in practice. NOT PUBLISHED (null): standover, trail, any handlebar or stem size. OTHER CHECKS by the collector (not stored as data): reach + stack / tan(D) reproduces the printed B within 1 mm on XS, M, L and XL and within 1.7 mm on S (531.3 vs 533, kept as published); the horizontal projections of RC and FC (using H as the drop) sum to the printed WB within 1 mm on every size; reach + (A + E) x cos(C) + F x sin(C) reproduces the printed FC within 1 mm, which explains why M and L share FC 588 and WB 992 (L's steeper head angle and longer head tube cancel out). No maker typos found. SIZING: the maker publishes no rider-height guide on this page. Source: image_table (the maker's own product page carries the geometry only as a JPEG catalogue page embedded in the description, https://www.hongfu-bikes.com/upload/image/20240916/1726478457906923.jpg, 1937 x 1300 px, alt text "FM238_00.jpg", page number 8 of a Hongfu catalogue, holding a frame render, a spec block, a labelled geometry diagram and a 5 x 13 table; numbers read by eye from a 2x upscaled crop of the table; image NOT stored in the repo)