Evidence reviewed through . Price records retain their own observation dates and conditions.View sourcesMethodology and dataset
Gelaro S4 GRX400
- Use
- Gravel
- Tire clearance
- 45 mm
- Drivetrain
- Shimano GRX400
- Weight
- 10.2 kg
- Frame standard
- T47 (BBT47)
- Category
- Gravel · drop-bar
- Availability
- Mainland retail and direct
10.2 kg complete bike with 45 mm tire clearance
Closest conventional alternative to Twitter when Shimano serviceability and a published 45C maximum matter more than electronic shifting.
The recorded complete-bike price is ¥12,089; the dated price record below preserves its channel and conditions. Best suited to Shimano-first buyer, reliability-focused budget buyer.
Key hardware: T800 carbon fiber frame; Shimano GRX400; 10.2 kg weight; tire clearance 45 mm.
Specifications and evidence
- Bottom bracket
- T47 (BBT47)
- Weight basis
- Official approximate complete-bike weight; size, pedals and accessories were not stated
- Drivetrain build
- Shifters: ST-RX400 · FD: FD-RX400 · RD: RD-RX400 · Crank: FC-RX600 46/30T · Cassette: 11–34T
- Brakes
- Hydraulic disc
- Wheels
- Aluminum rims
- Tires
- 700×40C
- Cockpit
- Aluminum
- Fit range
- 6 sizes (470–580) · stack 533.6–637.1 mm · reach 360–410 mm
- Purchase route
- Current exact SAVA global-direct page lists US$1,799 with selectable sizes and colors and add-to-cart; SAVA also exposes an official JD storefront for mainland buyers, but an exact selected CNY checkout total was not captured
- Frame material
- T800 carbon fiber
- Frame construction
- R21 internally routed carbon gravel chassis; the manufacturer describes optimized lay-up and reinforcement around the rear-stay/seat-tube junction, but does not publish the lay-up schedule or molding process
- Stiffness evidence
- The manufacturer says the dual rear stays and reinforced oversized seat-tube junction increase lateral stiffness while preserving compliance. A long-term independent R21 S4/S6 review reports no noticeable bottom-bracket-area flex while climbing, useful stay compliance over washboard and stable descending. Both are qualitative evidence, not measured stiffness results.
- Cable routing
- Internal
- Use
- Gravel
- Category evidence
- Category: Gravel.
- Internal frame storage
- No
- Mounts
- None recorded
- China purchase
- Mainland retail and direct
Ride and buying context
Shimano GRX hydraulic system. Official 45C maximum. Established complete-bike distribution.
What to verify
Usually costs more than Twitter EDS with less headline component value. T800 label does not independently prove better frame execution.
About SAVA
Established complete-bike seller with broad distribution. Model-level specification is clearer than factory-process disclosure.
Visit the official SAVA websitePrice record and sources
Reference conversion only; selected size and finish, shipping, tax, stock, delivery eligibility, returns, warranty handling and mainland checkout are unverified.
Retained SAVA official flagship-store card displayed CNY 7,999 for Gelaro / 越界 S4 with Shimano GRX and hydraulic disc brakes. Size, promotion, shipping, seller terms and final checkout may differ. Current exact-model evidence consolidates this observation into the canonical Gelaro S4 GRX400 record.
Verify current exact SKU and checkout total.
Each source is labelled by what it supports. Confidence applies only to that role.
Official product claims for drivetrain, stock tire, maximum clearance, and weight.
Cross-checked compilation of public product pages, marketplace references, Chinese industry sources, and dated price observations. Approximate values require fresh verification.
Current manufacturer product page identifies the exact Gelaro S4 R21-GRX400-20S build, states an approximately 10.2 kg complete weight, Shimano GRX400 2x10, 700x40C stock tires and 45C maximum compatibility, and publishes a six-size geometry table. It also displays a two-year frame warranty and fourteen-day free-return banner; those global-page terms still need confirmation for a mainland seller/SKU. The displayed price is USD and is not imported as a mainland CNY observation.
Current exact-model manufacturer page supports the R21-GRX400-20S build, approximately 10.2 kg complete weight, BBT47 bottom bracket, GRX400 ST/FD/RD, FC-RX600 46/30T crank, 11–34T cassette, aluminum wheelset and handlebar, 700x40C stock / 45C maximum, six-size geometry, four colors and global factory-direct US$1,799 pricing. The weight basis does not state size, pedals or accessories, and the USD price is not a mainland CNY checkout observation.
Official mainland storefront exposes Gelaro S4 and SF6 as purchase routes, but no stable exact-option checkout price was captured. Product specifications remain anchored to the exact manufacturer pages.
Current exact R21-GRX400-20S manufacturer page lists US$1,799, selectable sizes and colors, add-to-cart and factory-direct shipping. It identifies the T800 carbon frame and fork, BBT47, Shimano GRX400 2x10, approximately 10.2 kg complete weight, 700x40C fitted tires and 45C maximum compatibility. Final mainland CNY checkout and domestic warranty handling remain unverified.
The author reports more than 1,800 km on the R21 S4/S6 platform and describes no noticeable bottom-bracket-area flex while climbing, useful stay compliance on washboard, stable descending, and slower acceleration attributable to the heavy wheels. This is qualitative ride evidence, not a measured stiffness test. The page describes T700 UD and press-fit construction, which conflicts with the current exact S4 manufacturer page's T800 and BBT47 specification and is treated as an older or mismatched report rather than a correction.
Current mainland index exposes the exact SAVA carbon gravel GRX400 hydraulic-disc option represented by the retained official-store card. It corroborates the canonical S4 mapping but does not establish final checkout or domestic warranty terms.
Official reference table lists CNY 7.7922 and USD 1.1596 per EUR for 31 August 2026. The resulting USD/CNY cross-rate is 6.7197309417; conversions are reference values, not checkout amounts.
42 screenshots and 160 listing observations were normalized into 133 model groups. Listed, coupon, subsidy, and first-order conditions are preserved in the research ledger. Screenshots, seller identities, and private data are not redistributed.