Chinese Bikes

Evidence reviewed through . Price records retain their own observation dates and conditions.View sourcesMethodology and dataset

SEKAFrame estimateResearch profile

SEKA Spear RDC frameset

Est. ¥22,990Frame ¥16,990 · China price · 2026-10-24
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Category
Aero road
Frame weight
685 g
Tire clearance
32 mm
Bottom bracket
BSA threaded, 68 mm
Sizes
XS, S, M, L and XL, plus racing MR and LR

Overview

SEKA Spear RDC frameset. SEKA's lighter Spear: an aero all-round frameset with a threaded BSA shell and a one-piece Rapier bar, listed by two mainland China dealers at the same price.

The displayed Est. ¥22,990 estimate adds the adjustable ¥6,000 build allowance to the recorded ¥16,990 frame price.

Package contents are unconfirmed; do not subtract component costs from the allowance without an exact package quote.

Buying context

Before buying, verify Weighed seatpost and a complete frameset package in one size; Mainland China dealer package contents and warranty registration for the listed option.

Specifications and evidence

Product type
Frame estimate
Category
Aero road
Evidence maturity
Research profile
Price basis
Frame ¥16,990 · China price · 2026-10-24
Frame
Spear RDC carbon frame and fork with the Wind Eye seat cluster
Frame material
TeXtreme base layers with DIALEAD pitch-based 65T/80T and Pyrofil 30T/40T (FAW69) carbon, plus PMI foam filling
Frame construction
One-mould True-One-Piece frame from about 350 cut plies; internal routing through SEKA's Rapier bar system
Frame weight
685 g
Frame weight basis
Official size-M bare frame without paint or metal parts; fork, bar and seatpost are not included. SEKA lists 729 g ±35 g for a painted size-M Shadow Black frame and says paint adds 20–100 g. Measured: Cyclingnews, size-L frame 758 g; an XHS reviewer, size-M frame in the dark-silver RDC finish 835 g with paint and metal parts, fork 406 g and Rapier bar 338 g; a paint shop, size-S RDC frame stripped and clear-coated 718 g, fork 345 g.
Tire clearance
32 mm
Tire clearance basis
Official maximum actual tyre width, front and rear, on SEKA's current global and China pages and in the 2024–25 catalog. A 35 mm tyre exceeds that limit; Klein Concept rode nominal 32 mm GP5000s and no wider fit is documented.
Stiffness evidence
SEKA reports a 14.5% stiffness-to-weight improvement and 5% more stiffness than Exceed RDC, plus 109 N/mm vertical compliance, on its own test protocol. Cyclingnews' rig found a size-L bottom bracket less stiff than the tester's steel road bike.
Bottom bracket
BSA threaded, 68 mm
Axles
12 mm thru-axles: front 118.6 mm M12×P1.0, rear 165.2 mm M12×P1.5
Cockpit
Rapier one-piece bar in 19 sizes (360–415 mm at the hoods, 80–130 mm stem); the Nanjing dealer lets buyers choose bar and seatpost
Seatpost
Spear aero post with 0 or 15 mm offset; clamp fits 7×7 to 7×11 mm rails
Sizes
XS, S, M, L and XL, plus racing MR and LR
Manufacturer package
Official store package: frame, fork, seatpost, Rapier bar, frameset and bar hardware, and aero bottle cages

Price history

ObservedPriceTypeConditions
¥16,990Observed market recordTaobao dealer frameset option (two dealers) · Standard Spear frameset ¥12,990 at both; Nanjing agent charges ¥200 shipping.

Geometry

Official Spear chart for both RDC and Standard frames, identical on the current product page and in the 2024–25 catalog; millimetres and degrees.

Dimension names follow the letters on SEKA's drawing; inseam height is measured 50 mm ahead of the bottom bracket with a 680 mm tyre diameter.

Scroll horizontally to see every size. Keyboard: focus the table area and use the arrow keys.

Recorded geometry by size
DimensionXSSMMRLLRXL
Stack508524543538570560600
Reach362370379386389397402
Trail68625858585755
C1 seat tube449463480476508496535
RC chainstay410410410410410410410
H bottom-bracket drop74747272727272
FC front centre570574574578591585608
WB wheelbase9699739739789909951008
L head tube107120136130164153193
N top tube498514534540557563585
Q1 head angle70.671.772.9737373.173.5
Q7 seat angle7574.8747473.573.573
F fork offset48484444444444
G fork length372372372372372372372
Inseam height725738759753786774814
Recommended rider height (cm)150-163161-173170-180171-186177-187179-194185-198
Original geometry transcription
Geometry complete current manufacturer table
Official Spear chart for both RDC and Standard frames, identical on the current product page and in the 2024–25 catalog; millimetres and degrees. Printed size columns: XS / S / M / MR / L / LR / XL. Stack: 508 / 524 / 543 / 538 / 570 / 560 / 600; Reach: 362 / 370 / 379 / 386 / 389 / 397 / 402; Trail: 68 / 62 / 58 / 58 / 58 / 57 / 55; C1 seat tube: 449 / 463 / 480 / 476 / 508 / 496 / 535; RC chainstay: 410 / 410 / 410 / 410 / 410 / 410 / 410; H bottom-bracket drop: 74 / 74 / 72 / 72 / 72 / 72 / 72; FC front centre: 570 / 574 / 574 / 578 / 591 / 585 / 608; WB wheelbase: 969 / 973 / 973 / 978 / 990 / 995 / 1008; L head tube: 107 / 120 / 136 / 130 / 164 / 153 / 193; N top tube: 498 / 514 / 534 / 540 / 557 / 563 / 585; Q1 head angle: 70.6 / 71.7 / 72.9 / 73 / 73 / 73.1 / 73.5; Q7 seat angle: 75 / 74.8 / 74 / 74 / 73.5 / 73.5 / 73; F fork offset: 48 / 48 / 44 / 44 / 44 / 44 / 44; G fork length: 372 / 372 / 372 / 372 / 372 / 372 / 372; Inseam height: 725 / 738 / 759 / 753 / 786 / 774 / 814; Recommended rider height (cm): 150-163 / 161-173 / 170-180 / 171-186 / 177-187 / 179-194 / 185-198. Dimension names follow the letters on SEKA's drawing; inseam height is measured 50 mm ahead of the bottom bracket with a 680 mm tyre diameter.

About SEKA

Premium Chinese performance brand with sophisticated aero designs; public factory-ownership evidence is limited.

Visit the official SEKA website

Videos

Build and ridePublication review

My Chinese Custom Build vs Specialized Tarmac SL8 - Superbike KILLER?

A March 2026 Cycling Weekly custom build on a size L SEKA Spear RDC frameset with Shimano Dura-Ace, compared by feel with the presenter's Specialized Tarmac SL8. It covers one build and its parts choices.

Cycling Weekly · 2026-03-31. The video contains paid promotion for an insurer that sponsors the channel's tech show; the presenter calls this his own custom build, and how the frame and parts were obtained is not stated. Disclosure basis.

Takeaways

  • Repeats a maker claim2:23He describes RDC as SEKA's lightweight version and repeats a claimed 685 g frame weight; his size L uses the regular fit, one of two fit options, the other having a much lower stack.
  • Build note3:07The one-piece Rapier bar routes the brake hoses and Di2 internally; his is 130 mm by 38 cm with slight flare, and the frame takes proprietary aero cages for round bottles.
  • Ride impression9:07He found it comfortable for an all-round race bike, with rear-end comfort closer to his Tarmac SL7 than to the SL8.
  • Finish and faults9:58Downsides he found: the supplied bottle cages have a sharp edge, and the derailleur hanger can shift when the rear wheel is removed, so the thru-axle may not engage until the hanger is realigned.
  • Build note11:14He notes that a custom build needs someone to check compatibility and assemble it, that the labour belongs in the budget, and that lesser-known parts may not fit as intended.
Automatic captions reviewed 2026-10-26. Paraphrased by Chinese Bikes; points apply to the build shown, not to every size or trim.
Hands-on reviewOwner review

Keep It or Return It? My First Impressions Of The Seka Spear

First impressions of a SEKA Spear RDC after a 140 km test ride in the Black Forest.

Klein Concept · 2025-07-13. No supply arrangement is stated; the presenter discusses whether to keep or return the bike he bought. Disclosure basis.

Takeaways

  • Ride impression7:46It set personal bests on his regular loop; it is stiff but less harsh than he feared over 5.5 hours, on 32 mm GP5000s with TPU tubes and 60 mm carbon-spoked wheels.
  • Ride impression10:29Descending felt planted and confidence-inspiring even in crosswinds, which he attributes to longer trail and wheelbase plus a 120 mm stem; the integrated bar is very stiff.
  • Finish and faults14:27Minor negatives: the paint marks easily, so he plans protection film, and the integrated aero bottle cages are heavier than light carbon cages.
  • Price at publication16:55He quotes about €3,200 for the RDC edition, with the regular Spear a little cheaper.
Automatic captions reviewed 2026-10-25. Paraphrased by Chinese Bikes; points apply to the build shown, not to every size or trim.

Sources

These sources support this model page; individual claims retain the confidence of their cited source.

  1. SEKA Spear frameset Taobao agent listing

    南京威尔单车 on Taobao · Marketplace product pageIdentity: High · Specification: Medium · Price: High · accessed 2026-10-24

    Nine RDC colours at ¥16,990 and standard colours at ¥12,990. The listing says bar and seatpost specifications are selectable (default spec without a note); sizes XS/S/M/MR/L/LR/XL; rider limit 109 kg; limited RDC 光谱/羽黑 at 0 stock. Shipping ¥200. No buyer, account, delivery-address or transaction data is retained.

  2. SEKA Spear frameset Taobao dealer listing

    鼓轮体育 on Taobao · Marketplace product pageIdentity: High · Specification: Medium · Price: High · accessed 2026-10-24

    Seven RDC colours at ¥16,990 and six standard colours at ¥12,990, 7-10 units per option; shipping included. Photos show frame, fork, seatpost and SEKA Rapier bar with hardware, but the text does not state package contents. No buyer, account, delivery-address or transaction data is retained.

  3. SEKA Spear product page and specifications

    SEKA Bikes · Manufacturer product page recheckIdentity: High · Specification: High · Price: None · accessed 2026-10-25

    One Spear page covers the RDC and Standard frames. Specification block: max tire width (actual) 32 mm, 700c, BSA threaded 68 mm, headset bearings 49.5×40.5×6.5 mm 45/45°, thru-axles front L118.6 mm M12×P1.0 and rear L165.2 mm M12×P1.5, saddle clamp for 7×7, 7×9, 7×10 and 7×11 mm rails. Weights: RDC 685 g and Standard 780 g bare frame, 729 g ±35 g for a size-M Shadow Black frame; weights vary with paint and size. Manufacturer comparisons with Exceed RDC: 5% more stiffness, 14.5% better stiffness-to-weight, 23% more vertical compliance with up to 17 mm seatpost deflection. Five regular and two racing sizes (MR, LR); the page's geometry image matches the 2024–25 catalog table.

  4. SEKA Spear 产品页与规格数据

    SEKA Bikes · Manufacturer product page recheckIdentity: High · Specification: High · Price: None · accessed 2026-10-25

    China specification block: front and rear maximum tire 32C (前后最大胎容量为32C), BSA threaded 68 mm, 700C. RDC 685 g and Standard 780 g are size-M bare-frame weights excluding paint and metal parts; an RDC Shadow Black size M is 729 g ±35 g. Vertical compliance 109 N/mm, 23% above Exceed; seatpost fatigue test 85 mm behind the post for 150,000 cycles at 144 kg, against the ISO reference of 70 mm, 50,000 cycles and 120 kg. Materials described for Spear: TeXtreme base layers, DIALEAD pitch-based 65T/80T and Pyrofil 30T/40T (FAW69) fibre, PMI foam filling and one-mould True-One-Piece construction. Rapier bar: 360–415 mm widths with 80–130 mm stems.

  5. SEKA 2024–2025 model-year catalog, Spear section

    SEKA Bikes · Manufacturer catalog recheckIdentity: High · Specification: High · Price: None · accessed 2026-10-25

    Rendered-pixel recheck of the catalog PDF (SHA-256 a9e36c0311028a6fbe1798902f583c899bb66ea040839543951bbcf0f70b5e1a). One Spear section covers RDC and Standard frames: Rapier integrated bar included with Spear framesets, mechanical and electronic shifting, max tire size up to 32c. Size-M frame weights: RDC 685 g unpainted and 729 g in Shadow Black (±35 g, accessories excluded); Standard 775 g unpainted and 860 g in Twilight Blue; paint changes weight by 20–100 g. Seven sizes (five regular, two racing), 0 or 15 mm offset seatposts, and a geometry table identical to the current official page. Rapier 375×100 mm is about 310 g painted, excluding metal parts.

  6. SEKA Spear RDC Frameset official store page

    SEKA Bikes · Manufacturer store product page recheckIdentity: High · Specification: High · Price: Medium · accessed 2026-10-25

    Global store listing for the Spear RDC Frameset at USD 2,801 in eight finishes (Opal White, Chronos, Thorian Purple, Nighthawk Blue, Solar Bronze, Meteor Pink, Shadow Black, Ultra White) and sizes XS–XL including MR and LR; most options were out of stock. Package: frame, fork and seatpost, Rapier integrated handlebar, frameset and Rapier accessories, and a Spear aero bottle-cage set; bare frame weight printed as 685 g ±35 g. Global-store price and stock do not establish mainland China checkout, delivery or dealer packages.

  7. SEKA Rapier Handlebar official store page

    SEKA Bikes · Manufacturer store product pageIdentity: High · Specification: High · Price: Medium · accessed 2026-10-25

    Spear's one-piece Rapier bar in 19 width-stem sizes measured at the hood position: 360 mm with 80–110 mm stems, 375 mm with 80–130 mm, 395 mm with 90–130 mm and 415 mm with 100–130 mm. Sold separately at USD 499. Product photos show the bar fitted to a Spear RDC front end.

  8. SEKA Spear product development manual current reopen

    SEKA Bikes · Manufacturer technical manual reopenIdentity: Medium · Specification: High · Price: None · accessed 2026-09-23

    The retained official manual geometry extraction was reopened. It is titled Spear and is not explicitly mapped to SPEAR RDC. The linked current manufacturer chart is image-only; preserve size availability but do not transfer the manual's numeric geometry to the RDC candidate.

  9. Seka Spear long-term review: ride experience

    XHS reviewer post · Community postIdentity: High · Specification: Medium · Price: None · accessed 2026-10-26

    Reviewer's article images (read from original pixels) state the official 685 g bare-frame claim and their own weigh-in of a size-M frame in 暗银 (dark silver): 835 g with paint and metal parts, fork 406 g and integrated bar 338 g. The ride report finds the frame very comfortable when seated, notes hand numbness from the fork and bar, and describes pedalling as less direct than stiffer race bikes, improving with different wheels. Personal segment times are ride impressions, not a controlled test.

  10. Refinished SEKA Spear RDC frame weigh-in

    XHS paint-shop post · Community postIdentity: Medium · Specification: Low · Price: None · accessed 2026-10-26

    A paint shop stripped a size-S Spear frame to bare carbon and re-coated it with clear primer, reporting 718 g for the frame and 345 g for the fork, 95 g less than its original paint. In a reply the poster confirms the frame is an RDC. This is a modified finish, not a stock weight.

  11. SEKA Spear RDC complete Taobao dealer listing

    苏州波波单车 on Taobao · Marketplace product pageIdentity: High · Specification: Medium · Price: High · accessed 2026-10-24

    Dealer custom build (整车订制方案). Spec image: 8170 Di2, DT Swiss ARC1100 50 mm black label, Continental Sport tyres with Ride tubes, Guee tape, Prologo saddle, BBR60; frame choice RDC ¥36,999 or standard ¥32,999. Option data matched: two RDC options ¥36,999, standard ¥32,999; 3 units each. Pre-order 15 days, shipping included. No buyer, account, delivery-address or transaction data is retained.