Evidence reviewed through . Price records retain their own observation dates and conditions.View sourcesMethodology and dataset
X-LAB RS8
- Category
- Road
- Complete weight
- 7.4 kg
- Frame weight
- 850 g
- Bottom bracket
- Shimano SM-BBR60
- Sizes
- XS, S, M, L and XL
Overview
X-LAB RS8. X-LAB's current all-round road bike alongside the RS9: an official 7.4 kg Shimano 105 Di2 build with BRANTA C45 UL carbon wheels, a full mainland China specification and geometry, and a CNY 21,980 official price. A CNY 10,980 frameset with an 850 g bare frame is also sold.
The recorded complete-bike price is ¥21,980; its date and basis remain visible below.
Buying context
Before buying, verify Manufacturer maximum tire clearance; Official mechanical-shifting compatibility (one owner reports no mechanical cable ports); Frame lay-up and fork fiber grade beyond the official Toray T800 frame statement; Final dealer stock, delivery total and mainland China warranty issuer.
Specifications and evidence
- Product type
- Complete bike
- Category
- Road
- Evidence maturity
- Official mainland China model
- Price basis
- Official price · 2026-10-27
- Drivetrain
- Shimano 105 Di2 2×12 (ST-R7170, FD/RD-R7150); 50/34T, 11–34T system reference
- Complete weight
- 7.4 kg
- Complete weight basis
- Official size-M complete-bike weight without pedals; paint finish may change the result.
- Frame
- X-LAB RS8 carbon frame; official description cites Toray T800 carbon
- Frame material
- Toray T800 carbon frame per the official description; lay-up and fork fiber grade are unpublished
- Frame weight
- 850 g
- Frame weight basis
- Official frameset page: unpainted size-M frame without fork and seatpost.
- Bottom bracket
- Shimano SM-BBR60
- Wheels
- BRANTA C45 UL carbon; 21 mm inner and 29 mm outer width; Center Lock
- Tires
- Maxxis HYPR ZK 700×28C clincher
- Cockpit
- X-LAB carbon integrated cockpit; size-specific 380–420 mm width and 80–120 mm stem
- Brakes
- Shimano 105 R7170 hydraulic; 160/140 mm rotors
- Axles
- 12×100 mm front thru-axle; flat-mount brakes
- Seatpost
- 300 mm carbon seatpost
- Max load
- 100 kg maximum load (official)
- Sizes
- XS, S, M, L and XL
- Geometry
- Official chart, stack/reach mm: XS 508/360, S 525/370, M 544/380, L 564/390, XL 587/400
- Mechanical shifting report
- One owner reports being advised to use electronic shifting because the frame has no mechanical-shift cable ports; XDS has not confirmed this.
The catalog row uses the official mainland China R7170 Di2 / BRANTA C45 UL complete bike. The frameset, one dealer-delivered build and one owner self-build stay separate below. An owner's report that the frame lacks mechanical-shift cable ports is recorded as unconfirmed; it is not applied as a compatibility rule.
Other documented builds
These are separate configurations. Their weight, drivetrain, and price are not mixed into the catalog reference row.
Frame 850 g for an unpainted size-M frame without fork and seatpost.
One purchase source delivery post; no price, weight or full component list.
Owner-assembled example; the owner's payments are not market prices.
Price history
| Observed | Price | Type | Conditions |
|---|---|---|---|
| ¥21,980 | Official reference | R7170 Di2 12S / BRANTA C45 UL complete bike · Official retail reference; final price varies by location and delivery method. |
Sources
These sources support this model page; individual claims retain the confidence of their cited source.
X-LAB RS8 complete-bike specification
Official mainland China specification for the R7170 Di2 / BRANTA C45 UL complete bike, described as an all-round road bike (综合型公路车) using Toray T800 carbon frame technology. It states 7.4 kg without pedals in size M (paint finishes vary), an X-LAB RS8 carbon frame, carbon fork with 12×100 mm thru-axle and flat-mount brakes, Shimano 105 Di2 ST-R7170 with FD/RD-R7150, FC-R7100 50/34T, CS-R7101 11–34T, SM-BBR60 bottom bracket, BR-R7170 brakes with 160/140 mm rotors, BRANTA C45 UL wheels with 21 mm inner and 29 mm outer width and Center Lock rotor mounts, Maxxis HYPR ZK 700×28C clincher tires, a size-specific X-LAB carbon integrated bar from 380×80 to 420×120 mm, a 300 mm carbon seatpost, Selle Italia SLR Boost saddle, a 100 kg maximum load and five sizes with stack/reach XS 508/360, S 525/370, M 544/380, L 564/390, XL 587/400 mm. No maximum tire clearance is stated.
X-LAB RS8 official mainland China purchase page
Official mainland China purchase page showed an official retail price of CNY 21,980 for the R7170 Di2 12S / BRANTA C45 UL complete bike, one listed finish and sizes XS–XL. The page says the final price can vary by location and delivery method and appears in the cart. Checkout was not started.
X-LAB RS8 frameset specification
Official mainland China RS8 frameset page: the frameset includes a carbon integrated handlebar and carbon seatpost; frame weight 850 g for an unpainted size-M frame excluding fork and seatpost; carbon fork with 12×100 mm thru-axle and flat-mount brakes; the same five-size geometry as the complete bike. Its related-product panel lists the frameset at CNY 10,980 and the complete bike at CNY 21,980.
XDS official mainland China bicycle store listing
Official mainland China store listing read in a browser on 2026-10-27. X-LAB cards and official prices: RS9 R9270 Di2 / Vision Metron 45 SL CNY 49,980; RS9 frameset CNY 17,800; RS8 R7170 Di2 / BRANTA C45 UL CNY 21,980; RS8 frameset CNY 10,980; RT9 frameset CNY 26,800; RT8 frameset CNY 9,980; DAWNBREAKER R7170 Di2 CNY 59,980, R9270 Di2 / Vision Metron 91 SL CNY 108,000 and frameset CNY 49,980; plus AD8, AD9, GT8 and mountain-bike listings. The GT8 2026 card describes X-LAB’s first racing gravel road bike (X-LAB首款竞速砾石公路车) at CNY 21,980. Road framesets are listed as including a carbon integrated handlebar and carbon seatpost. The XDS-series filter returned no bicycles and no AD7 card appeared.
RS8 seller delivery post (Shimano 7170 Di2, TUKUS carbon wheels)
purchase source delivery post dated 06-29 (year not displayed) naming one delivered RS8 built with Shimano 7170 electronic shifting and TUKUS carbon wheels. One dealer build, not a factory bill of materials; no price, weight or geometry.
Owner self-build notes (edited 01-09, year not displayed) for an RS8 frame ordered through a dealer and built with Shimano 105 Di2 and third-party steel-spoke carbon wheels. The owner reports being advised to use electronic shifting because the RS8 frame has no mechanical-shift cable ports; XDS has not confirmed this, so it is an owner report rather than a compatibility rule. Owner payment amounts are not used as market prices.