Evidence reviewed through . Price records retain their own observation dates and conditions.View sourcesMethodology and dataset
GIRDER 格拉德 Tsar press-fit T700/T800 Ultegra Di2
- Category
- Aero road
- Bottom bracket
- Press-fit shell per manufacturer; the supplied in-house ceramic-bearing BB (19 G5 silicon-nitride balls) is described as 'PF386 to T47 tool', so confirm the exact shell standard before ordering parts
- Sizes
- S (476 mm), M (503 mm), L (533 mm); the size dimension is not labelled
- Complete weight
- 8.8 kg
Overview
GIRDER 格拉德 Tsar press-fit T700/T800 Ultegra Di2. An Ultegra Di2 R8170 build of GIRDER's earlier T700 + T800 press-fit aero frame family at an official ¥18,800, with 50/60 mm wheels and the same size labels as the press-fit Arrow.
The recorded complete-bike price is ¥18,800; its date and basis remain visible below.
Buying context
Before buying, verify Geometry chart (the official chart image was refused to a non-browser read on 2026-10-24); Exact bottom-bracket shell standard; Manufacturer-published maximum tire clearance; Complete-weight size, pedal and measurement basis; Frame or frameset weight; Independent exact-model stiffness or deflection measurement; Current mainland China marketplace listing or checkout amount, warranty issuer, warranty term and invoice handling; Frame production factory; Rights-cleared exact product image.
Specifications and evidence
- Product type
- Complete bike
- Category
- Aero road
- Evidence maturity
- Research profile
- Price basis
- Official price · 2026-10-24
- Drivetrain
- Shimano Ultegra Di2 R8170 2×12; FC-R8100 52-36T 170 mm crank, CS-R8100 11-34T cassette, CN-M8100 chain system reference
- Brakes
- Shimano Ultegra R8170 hydraulic disc
- Frame
- ROAD-section TSAR T700 + T800 carbon aero frame and fork, 12 mm thru-axles, fully hidden routing
- Frame material
- T700 + T800 carbon frame and fork; fiber supplier and lay-up are not published
- Frame construction
- EPS-molded aero frame and fork with hidden routing and press-fit bottom bracket
- Stiffness evidence
- No measured or comparative stiffness evidence found
- Bottom bracket
- Press-fit shell per manufacturer; the supplied in-house ceramic-bearing BB (19 G5 silicon-nitride balls) is described as 'PF386 to T47 tool', so confirm the exact shell standard before ordering parts
- Wheels
- Adler Augen wavy-rim ceramic-bearing wheels, 50 mm front / 60 mm rear
- Tires
- Maxxis M228 700C×28C skinwall folding tires with TPU tubes fitted; maximum clearance is not published
- Cockpit
- T700 + T800 integrated carbon handlebar with hidden routing
- Saddle
- Selle Italia saddle and silicone bar tape
- Sizes
- S (476 mm), M (503 mm), L (533 mm); the size dimension is not labelled
- Complete weight
- 8.8 kg
- Complete weight basis
- Manufacturer-listed weight for this complete bike; size, pedals and weighing method are not stated
Official ROAD TSAR page; GIRDER sells by direct inquiry and no mainland China marketplace listing was verified. See docs/research-girder-range-inventory-2026-10-24.md for related generations kept separate.
Price history
| Observed | Price | Type | Conditions |
|---|---|---|---|
| ¥18,800 | Official reference | Manufacturer-listed price on the exact ROAD TSAR page; no mainland China marketplace listing or checkout amount was observed |
About GIRDER
GIRDER (格拉德) is sold in China by 苏州格拉德自行车科技有限公司, a Kunshan company recorded in a public directory as established on 2015-01-27. The company's own site says it licensed a British brand, tracing it to the 1977 founding of the Edinburgh Bicycle Co-operative and to partners in Manchester, with China authorization in 2014. We found no independent evidence for that origin or licence, so it remains a company claim. A 2016 Biketo article calling GIRDER a domestic brand was published under GIRDER's own byline, not as independent reporting.
Visit the official GIRDER websiteSources
These sources support this model page; individual claims retain the confidence of their cited source.
Exact ROAD-section TSAR page lists ¥18,800; sizes S (476 mm), M (503 mm), L (533 mm); T700+T800 aero frame and fork, EPS molding, fully hidden routing, press-fit BB, 12 mm thru-axles; T700+T800 integrated bar; Ultegra FC-R8100 52-36T 170 mm, R8170 Di2 2×12, R8170 hydraulic discs, CN-M8100, CS-R8100 11-34T; in-house ceramic BB ('PF386 to T47 tool'); Selle Italia saddle and tape; Adler Augen wavy-rim ceramic-bearing wheels 50 mm front / 60 mm rear; Maxxis M228 700C×28C skinwall with TPU tubes; weight 8.8 kg (basis not stated). ROAD-section bikes share T700+T800 carbon and press-fit shells and do not share a frame with NEW 2025 bikes of the same name. Read over HTTP from a page copy saved 2026-10-24 (the HTTPS certificate had expired).
Official contact page lists a sales email and messaging contact and a business address in Lujia Town, Kunshan. It is a direct sales-inquiry route; no online checkout, marketplace store link, warranty term or shipping policy is published.
Brand-authored history. States that GIRDER Bicycle Technology Co., Ltd. was founded in 2015, introduced the British bicycle brand GIRDER and handles design, R&D and sales; positions products in the CNY 5,000–20,000 range. Claims the brand dates back to the 1977 founding of the Edinburgh Bicycle Co-operative, that partners in Manchester created the GIRDER brand, and that authorization to enter China succeeded in 2014. These origin and licensing claims are company-reported and were not independently corroborated. The HTTPS certificate had expired on access; the page was read over HTTP.