Chinese Carbon Road Bikes > Road Bike Frames, Wheels & Components

TANTAN FM202

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SjoerdVerbraak:
Dear all,


I bought a TANTAN FM202 to test. The Geometry looks perfect for me (not to deep)

Anyone allready any experience with this frame? TanTan told me it needed Internal t47 BB. (look like not alot of meat near the BB )

Will build it with DI2 105 + zipp 303S 30mm tyres

heljan:
I am also interested in this frame - and also because the reach is a bit higher ;)

Can anyone explain (or point me to a site) how T47 measurements work?
I would like to use a SRAM setup and I asked TanTan for specifications.
Their reply was:

--- Quote ---T47-86.5*24*24 (shimano), 24*22 or 30*30 (SRAM)
--- End quote ---

I did some research on SRAM website myself and found this: https://www.sram.com/globalassets/document-hierarchy/compatibility-map/road/dub-choose-a-road-bottom-bracket-compatibility-map.pdf
Only a 85.5 BB is specified for threaded T47.

I am a bit lost:
T47 is the thread an defines the outer measure of the BB, right?
24*24 and 24*22 and 30*30 (does that exist for road bikes at least?) or DUB (which is 28.99mm) specifies the spindle diameter, right?

What does the 86.5 vs 85.5 specify?
And what about spindle width, is that defined for a threaded T47?
Are there more measures I need to be aware of?

c.etzo:
take a look at this page
https://www.firstcomponents.com/t47-bottom-bracket/

if bb shell is 86.5 just take a t47 internal for dub (if sram asx crankset)

ritxis:
same frame as???.....

Velobuild 2023 VB-R-066  https://www.velobuildmall.com/products/2023-vb-r-066-carbon-fiber-endurance-road-racing-bike-frame-disc-version

 Og-Evkin QONQI  https://ogevkinbike.com/products/qonqi-road-carbon-fiber-frame-v-brake

heljan:

--- Quote from: c.etzo on September 27, 2023, 01:24:13 AM ---take a look at this page
https://www.firstcomponents.com/t47-bottom-bracket/

if bb shell is 86.5 just take a t47 internal for dub (if sram asx crankset)

--- End quote ---

@c.etzo: I am not sure what you are saying.

I took a look at the fristcomponents page.
SRAM specifies T47-85.5 so I have a BB like this: https://www.firstcomponents.com/wp-content/uploads/2018/10/C47-985-85-point-5-assembly-A1.pdf
TanTan specified T47-86.5 so I would go for something like https://www.firstcomponents.com/wp-content/uploads/2018/10/D47-392F-86-point-5-92-FSA-assembly.pdf

There is a 1 mm difference between these BBs. Can I simply use a T47-85.5 in a wider frame shell?

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