Tantan GR356

Gravel · 4 sizes

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Bike: Tantan GR356 · Gravel · 4 sizes
Geometry: bikeinsights.com, fetched 22 Oct 2026
These numbers are second-hand, from Bike Insights. I have not checked them against the maker's own table. Bike Insights cites tantanbicycles.com.
Cockpit: Generic stem and bar, assumed
Solved with: cover 10 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
Sheet: 22 October 2026 · 879 bikes, 79 makes, 4,979 sizes in the catalogue

Geometry, every size, from Bike Insights

The tinted row is the size drawn beside it. Press a size to draw it.

Size	Stack (mm)	Reach (mm)	Head angle (deg)	Seat angle (deg)	Head tube (mm)	Chainstay (mm)	Wheelbase (mm)
S	565.5	361	70.5	73.5	111	440	1012.5
M	591	374	70.5	73.5	141	440	1036
L	617	386	71.5	73.7	164	440	1046.6
XL	640	398	71.5	73.5	191	440	1067.6

The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.

The L drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm.

The maker's cockpit

No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.

Generic stem and barAssumedNo bar is listed for this frame.

Frame facts

not read off the maker's page yet: tantanbicycles.com

Tyre clearance: not recorded yet
Bottom bracket: not recorded yet
Axles and brakes: not recorded yet
UDH: not recorded yet
Seatpost: not recorded yet
Frame weight: not recorded yet

Notes on the source

SECOND-HAND NUMBERS: copied from Bike Insights (https://bikeinsights.com/bikes/6a5809d972770e001b08e789-tantan-cycling-seraph-gr356?version=2026&build=base ), not read off the maker's own table. Source: aggregator (Bike Insights)

How I read Bike Insights' table

Bike Insights cites the maker's page: https://www.tantanbicycles.com/carbon-gravel-frame-max-tire-70061c2924-disc-brake-bike-full-hidden-cable-bicycle-part-carbon-fiber-t1000-t47-udh-gr356-p7113619.html. The maker no longer publishes this table, so these numbers have not been checked against it; the seed stores this version as an aggregator source and caps its band (D17, D4 second amendment). Build: Base. Bike Insights files it as Road Bike / Mixed-terrain Road Bike / All-road/Gravel. Trail is left null: Bike Insights computes its own and the maker's is not on the page. Not checked against the maker's archived page: web.archive.org blocked this machine on 22 Oct 2026; a later pass should read the capture and upgrade this file to the maker's numbers. Tantan (Shenzhen TanTan Sports Equipment, also sold as SERAPH) still lists its frames on tantancycling.com, but on 22 Oct 2026 the site's chart images answered HTTP 302 to a third-party host (api03.miancp.com), which was not followed, so the maker's own chart could not be read; a later pass should read it and upgrade this file.