Chinese Carbon Road Bikes > Road Bike Frames, Wheels & Components
TANTAN FM202
Sakizashi:
--- Quote from: heljan on September 27, 2023, 08:35:53 AM ---There is a 1 mm difference between these BBs. Can I simply use a T47-85.5 in a wider frame shell?
--- End quote ---
This depends on the length of your spindle. If you are using a wide crankset (or rival / apex 1x) it will be fine to use the sram BB. You will need a custom pack of spacers. 2mm total on the DS and 5mm on the NDS. A regular AXS crank will not fit with this BB unless you are willing for it to be off-center. Luckily i think other brands like wheels MFG make solutions that work.
In reality always get my own spacer packs as I like to ensure that the cranks are centered to the seat tube.
c.etzo:
--- Quote from: heljan on September 27, 2023, 08:35:53 AM ---@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?
--- End quote ---
86.5 or 85.5 is the width of the bb frame shell, so if tantan specify that the frame has a 86.5, i'll go for it
look at hambini guide to t47 https://www.hambini.com/engineering-guide-t47-bottom-bracket-standard/
ChrisB:
Looking forward to see your build and ride report.
This frame ticks many boxes and with the 32mm max. tire width it would be a great allrounder.
BR Chris
heljan:
Once more regarding the T47 BB: I think I started with a wrong assumption and would like to double-check with you...
My assumption was that the frame is 86.5 and that BB cups + BB sleeves has a fix width (86.5 or 85.5 e.g.).
But looking at the Hambini Guide (thx by the way) and a number of products and specifications, I understand that the BB sleeve is normally only fix on one cup-side and can travel (a bit) in the other cup, right?
So, we are talking about the width after installation. And if I install a SRAM BB and end up with 86.5 width, I need to correct this width by using 2 rather than 3 mm spacers on the drive side to achieve the correct chain line, correct?
JVC:
--- Quote from: SjoerdVerbraak on September 04, 2023, 11:03:15 AM ---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
--- End quote ---
Hi, did you receive the frame and have you assembled it?
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