Dengfu R01 Ultralight

CONVENTIONAL two-piece cockpit (round steerer, no integrated bar). The frameset "Include" line reads "frame, fork, seatpost, seat clamp, headset" - no handlebar or stem is included. The geometry table carries two cockpit rows, HB (handlebar width) 400 / 400 / 420 / 420 / 420 / 440 / 440 and STEM (length) 80 / 90 / 100 / 100 / 100 / 110 / 120 for 48 / 50 / 52 / 54 / 56 / 58 / 60 cm, footnoted by the maker: "*The size of the HANDLEBAR (HB) and STEM is optional according to your requirement. If need, please note when placing the order." - so they are the maker's size-matched defaults for a bar and stem added to the order, not a fixed spec. No bar reach/drop, stem angle, stem clamp height, spacer heights or maximum spacer stack are published for the frameset. The complete-bike listing (https://www.dengfubike.com/products/r01) fits an aluminium handlebar and stem on the Sensah Empire build and a "TORAY T700 carbon fiber" handlebar and stem on the Ultegra R8000 and Dura-Ace Di2 R9150 builds, with no dimensions stated; cranks are 170 mm on the Sensah build and 172.5 mm on the Shimano builds. Headset: head tube "Tapered, 1 1/8"-1 1/2"", headset included (the complete bike names it NECO); bearing sizes and top cover height not published. Seatpost: "TORAY T800 carbon fiber, 27.2mm diameter, 350mm", round; offset/setback not published. Seat clamp included. Fork: full carbon, fork length (axle to crown, table row E) 370 mm on every size; fork offset not published. Rim brake only, max tyre 700x25C.

rows A, REACH, STACK, B, C, D, E, F, H, I, J, FC, WB, HB, STEM. The same table (every cell identical) appears on three maker pages: the frameset page (source_url), the dedicated page https://www.dengfubike.com/pages/r01-geometry and the complete-bike page https://www.dengfubike.com/products/r01. LEGEND: the letters are defined only by the geometry diagram image (no text legend anywhere on the site). STACK DATUM: the diagram draws STACK vertically from the BB centre to a horizontal line at the TOP OF THE HEAD TUBE (frame, no headset cap), and REACH horizontally from the BB centre vertical to the same point - the standard datum. SIZE NAMES: 48cm to 60cm are nominal labels; they match neither A (465-585), B (420-540) nor C (515-590), so they are recorded as labels only. Degrees: the site prints the angle cells with the ordinal symbol (e.g. "72.5º"); numbers only are recorded. Standover, fork offset and trail are not published - null. CONSISTENCY: FC, J and H reproduce WB on every size to within 0.5 mm (e.g. 48cm sqrt(577^2-69^2)+sqrt(405^2-69^2) = 972.0). PROBABLE MAKER TYPO, kept as published: 56cm STACK is printed 578, only 1 mm below the 58cm value (579) and 37 mm above the 54cm value (541), while the head tube grows 19 mm from 54 to 56 at 73 deg (about +18 mm stack) and 20 mm from 56 to 58 at 73.5 deg (about +19 mm); the frame's own reach, head tube and front centre steps are consistent with a 56cm stack of about 558-559, so 578 looks like a 5/7 digit slip. 578 is stored because it is what the maker publishes; treat the 56cm stack with care until Dengfu corrects it. CATEGORY: the maker's own navigation files the R01 under Road > Climb (collection carbon-climb-road-bikes, members R01, R02, R02 DISC) and the R01 highlights page headline is "HILL CLIMBING GEOMETRY ... The slightly slack seat tube angle and short wheel wheelbase provide excellent control during hill climbing." FRAME FACTS (spec table): Toray T800 carbon, frame weight (no fork) 850 +/- 45 g, rim brake, internal cable routing, Di2 compatible, brazed-on front derailleur mount, BB options BSA / BB30 / PF30, max tyre 700x25C, finish UD matt or glossy, USD 550, and the maker's line "Ultralight version and regular version in random shipping." MODEL YEAR: the table is undated; the frameset product record was created 2019-07-29 (Shopify created_at), the geometry image is versioned 2019-08-29 (v=1567042861), the complete-bike record dates from 2019-06-06; the listing was live and unchanged on 2026-08-29, so model_year is null with 2019 as the first-published year. Source: html_table (maker's own Shopify store, GEOMETRY tab is a real HTML table; the letter legend was read from the geometry diagram image https://cdn.shopify.com/s/files/1/0245/4929/4185/files/R01_GEOMETRY_2048x1148_887b17d4-d2c2-42fa-b546-b5b131a7beff_2048x2048.png on the same page, image NOT stored)