Evidence reviewed through . Price records retain their own observation dates and conditions.View sourcesMethodology and dataset
JH37 frameset
Race gravel
Official JH37 side-view product photograph; it depicts the frameset, not a complete-bike build.
- Tire clearance
- 40 mm
- Weight
- 850 g · frame
- Frame standard
- T47, 48 mm × 86 mm shell
- Fit range
- 4 sizes (470–560) · stack 515–570 mm · reach 363–390 mm
- Where to buy
- Purchase route and checks
Overview
Cheapest credible strict manufacturer option for a light 40C race-gravel build, with a wide uncertainty interval.
Best for: ultra-budget custom builder, light race build
Specifications
- Product type
- Frameset
- Handlebar
- drop-bar
- Bottom bracket
- T47, 48 mm × 86 mm shell
- Frame weight
- 850 g
- Weight basis
- Size 50; paint adds approximately 20–100 g
- Included package
- frame, fork, small parts; verify exact package
- Fit range
- 4 sizes (470–560) · stack 515–570 mm · reach 363–390 mm
- Frame material
- T800-claimed
- Stiffness evidence
- No exact-model instrumented stiffness result or attributable JH37 owner ride assessment was found after the 50-area sweep. A forum reply about a different TFSA road frame was rejected as sibling-model evidence.
- Cable routing
- Fully internal
- Category evidence
- Category: Race gravel.
- Internal frame storage
- No
- Mounts
- top-tube
Price history
| Observed | Price | Type | Conditions |
|---|---|---|---|
| ¥2,512 | Listing optionAvailable | Exact selected option 铁灰色+黑 / 50码, SKU 5918666587011. The listing showed ¥2,730 before a ¥218 满2400减218 coupon and ¥2,512 after it, with stock, 15-day preorder dispatch and domestic SF shipping included. This is an option-level listed price, not a completed checkout total; coupon eligibility and final settlement can change. | |
| ¥2,300–3,000 | Reference rangeApproximate current price | Verify current exact SKU and checkout total. |
Purchase route Historical exact Taobao item 670337545285 listing (source dated 2026-08-27) showed the selected grey/black size-50 option as a 15-day preorder. A direct 2026-09-23 recheck returned a non-retryable page-open error; current stock, price and checkout are unconfirmed.
Fit and frame evidence
- Tire clearance
- Up to 40 mm.
- Evidence: official source.
- Official 700C maximum 40C; 650B claim is wider.
- Frame
- Derailleur hanger: standard.
- Carbon claim: T800-claimed.
- Cable routing: fully internal.
- Mounts: top-tube.
Geometry
exact-model Taobao seller geometry chart
Scroll horizontally to see every size. Keyboard: focus the table area and use the arrow keys.
| Dimension | 470 | 500 | 530 | 560 |
|---|---|---|---|---|
| Seat tube angle (°) | 73.5 | 73 | 72.5 | 72 |
| Head tube angle (°) | 70 | 70.5 | 71 | 72 |
| Front center (mm) | 583 | 591 | 598 | 610 |
| Chainstay (mm) | 430 | 430 | 430 | 430 |
| BB drop (mm) | 67 | 67 | 67 | 67 |
| Fork offset (mm) | 50 | 50 | 50 | 50 |
| Fork length (mm) | 386 | 386 | 386 | 386 |
| Wheelbase (mm) | 1004 | 1012 | 1019 | 1031 |
| Reach (mm) | 363 | 371 | 378 | 390 |
| Stack (mm) | 515 | 527 | 543 | 570 |
TFSA JH37 Taobao listing · 2026-08-27
Ride and buying context
850 g claim. T47. Very low frame price.
About TFSA
Frame manufacturer with aggressive weight claims and budget pricing; public model-specific fatigue and inspection evidence is limited.
Visit the official TFSA websiteSources
Each source is labelled by what it supports. Confidence applies only to that role.
Current exact-model manufacturer page states an 850 g size-50 frame with paint adding approximately 20–100 g, T47 threaded 48 mm diameter by 86 mm shell, fully internal routing and 700x40C maximum. The manufacturer route is quote-only and does not expose a retail checkout price or a geometry table.
The signed-in public listing identifies item JH-37. Selecting 铁灰色+黑 and 50码 produced SKU 5918666587011, a ¥2,730 listed price and a displayed ¥2,512 price after a ¥218 满2400减218 coupon. Stock was shown with a 15-day preorder dispatch and domestic SF shipping included. Checkout was not completed. The exact-model detail image supplies the four-row geometry chart; only unambiguous dimensions were transcribed. No buyer, account, delivery-address or transaction data is retained.
TFSA JH37 Taobao listing current recheck
A direct current recheck of the exact listing returned a non-retryable page-open error. This does not confirm current stock, price, checkout or shipping. Retain the 2026-08-27 exact listing snapshot only as historical evidence; do not retry the same inaccessible page in this run.
Compiled China carbon gravel market research
Cross-checked compilation of public product pages, marketplace references, Chinese industry sources, and dated price observations. Approximate values require fresh verification.