Velobuild VB-R-368 AeroTrace

INTEGRATED one-piece bar/stem picked at order under 'INTEGRATED BAR NO#': HB010 ('Rear and Drop 80mm 125mm Alloy Spacers') or HB050 ('Rear and Drop 80mm 125mm Plastic Spacers') - the maker's 'Rear and Drop 80mm 125mm' reads as bar reach 80 mm and drop 125 mm, the only difference stated between the two is alloy vs plastic spacers. Width/stem combinations offered (bar width mm / stem length mm): HB010 = 380/90, 380/100, 400/90, 400/100, 420/100, 420/110, 440/110, 440/120; HB050 = 380/90, 380/100, 380/110, 400/90, 400/100, 400/110, 420/90, 420/100, 420/110. Spec sheet image on the same page (HANDLEBAR HB-050): full carbon T800, 380 g, 'Integrated bar: 380/90 380/100 400/90 400/100 420/100 420/110 440/110 440/120mm'. Third option 'Separate Bar Stem': bar 400 / 420 / 440 mm with stem 80 / 90 / 100 / 110 / 120 mm. No per-size default bar or stem is stated (the buyer chooses), so stock_stem_length and stock_bar_width are null. Stem angle, bar/stem clamp height, individual spacer heights and maximum spacer stack NOT published. Headset bearings 1-1/2 in x 8 mm upper and 1-1/2 in x 7 mm lower; fork steerer length 300 mm (spec sheet). Seatpost (spec sheet): full carbon T800 aero seatpost, length 400 mm, 'aero multiple function', single-bolt pivot adjustment, 7x7 mm round-rail clamp with a 7x9 mm oval-rail clamp included, 230 g without metal parts; seat clamp is an integrated wedge ('Seat clamp Wedges improved' for 2026). Seatpost offset/setback NOT published (the chart drawing shows a rearward saddle clamp but gives no number). Fork (spec sheet): full carbon T800, 470 g, offset 45 mm (the geometry chart's OFFSET column says 43 - see notes), flat mount, 12 x 100 mm thru axle (M12 x 1.5 x 122 mm), max tyre 700 x 32C, max rotor 160 mm.

support@velobuild.com), i.e. the manufacturer's site. The page publishes NO text geometry table; the numbers below were read by eye from the maker's geometry chart image (1080 x 799 px PNG, columns SIZE, SZ, TT, RC, FC, CA, HA, WB, BB, HT, OFFEST [sic], FL, REACH, STACK, DG, STR, five rows 460/490/520/550/580). The CDN path dates the chart upload to 2025-07-10; the spec sheet image (specification.jpg) is dated 2026-06-24 in its path. READING CHECKS: the chart's own STR column (1.373 / 1.391 / 1.383 / 1.395 / 1.393) equals stack/reach for every row as read, and sqrt(FC^2 - BB^2) + sqrt(RC^2 - BB^2) reproduces the published wheelbase to within 0.5 mm on every row, so stack, reach, front centre, chainstay, BB drop and wheelbase are confirmed. SIZE NAMES: the chart names sizes by seat tube length (460/490/520/550/580); the order form names the same five sizes XS(46), S(49), M(52), L(55), XL(58) and the spec sheet says 'FRAME SIZE: XS/S/M/L/XL'. This page's selector only lists XS(46) and S(49) and the description says 'Size XS S availale only' (stock availability, not a smaller size run - the sister page for the VB-R-368 Pro at https://www.velobuild.com/products/2026-vb-r-368-pro-aerotrace-carbon-fiber-aero-road-bike-frame-disc-brake-toray-1000-carbon-fiber lists all five and uses the identical chart file re-uploaded on 2026-06-24). DISCREPANCY: the geometry chart gives fork offset 43 mm on every size while the spec sheet on the same page says 'FORK OFFSET: 45mm' - fork_offset is recorded from the geometry chart (43) and the spec value flagged here; trail is not published and was NOT derived. Rider height guidance: none published on the page. FRAME SPEC (spec sheet): full carbon T800, 1350 g size M clear coat without metal parts, integrated seat clamp, T47 threaded BB (ID 46 mm, width 86.5 mm), UDH rear hanger, Di2 and eTap compatible, EPS + latex moulding, fully integrated cable routing, rear thru axle M12 x 1.0 x 163 mm, flat mount, max tyre 700 x 32C, max rotor 160 mm; 2026 changes listed by the maker: rear chainstay area revised so the rear derailleur no longer touches inside the chainstay, Di2 battery moved inside the down tube near the BB, seat clamp wedge improved. The 'VB-R-368 Pro' (Toray T1000 layup, 1200 g frame, 490 g fork, same T800 HB-050 bar, 'Wider Aero Fork Available') is a layup variant with the same geometry chart, not a separate geometry. Source: image_table (maker's own site; geometry chart image https://ueeshop.ly200-cdn.com/u_file/UPBA/UPBA916/2507/10/products/R-368BIKEFRAMEGEOMETRY-122535cb4c.png, shown in the product gallery and repeated in the description as https://ueeshop.ly200-cdn.com/u_file/UPBA/UPBA916/2507/10/photo/R-368BIKEFRAMEGEOMETRY.png)