Sensah has 2x12 levers for brake bridges compatible with Shimano 11s derailleurs.....For those who have a mechanical Shimano groupset and want to get a 12 cassette

They would also be compatible with Tiagra 4700 and GRX RX400 10s rear derailleurs

https://es.aliexpress.com/item/1005006631299384.html?pdp_npi=4%40dis%21EUR%21%E2%82%AC%20220%2C71%21%E2%82%AC%20110%2C35%21%21%21233.41%21116.70%21%40211b80c217123895141418285ef495%2112000037876389255%21sh%21ES%211896245134%21&spm=a2g0o.store_pc_allItems_or_groupList.new_all_items_2007523867675.1005006631299384&gatewayAdapt=glo2esp

If it’s a thickness issue, I imagine a few spacers could solve that? Or maybe a different top cap?

Focus Izalco Race with Cube Attain fork.....(frame head tude and fork tube tapered 1 1/8"-1 1/4"




Frame with  Defy OD2 fork









Detail upper headset (FSA OD2)

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Interesting. I wonder if it’s the same fork with a different headset. I was looking at the diagrams and the outer diameter of the top bearing is the same for the TCR and Tarmac (and most road bikes). The inner diameter is what is difference to fit the bigger steerer tube. I wonder if you could just buy a TCR headset assembly to make it work.

without counting the new TCR 2025...all previous TCRs have the seat for the steering the same up or down...so all TCR frames can mount OD2 or OD fork......You just have to install the appropriate bearings, up and down.

I have a Giant OD2 fork at home and I can place the fork on a Focus frame and on a Cube, with the OD2 lower bearing...the problem is at the top, although the bearing fits into the frame, when putting the adjustment wedge and the bearing cover, there is a lot of space between it and the frame

From what I have looked at, the superior OD2 bearing has an external diameter the same as other bikes with a 1 1/8 headset (the ones named Focus and Cube and many others...) but that bearing, the wedge and the cover are specific for OD2 forks.....There may also be a difference in the depth of the seat at the top of the frame.....

in short.....In the same TCR frame we could mount their OD2 and OD forks and other forks that have a 1 1/4" bottom, but the Giant OD2 forks with a 1 1/4" top tube would not be suitable for other frames....we would just have to check the Canyon and Scott using above 1 1/4"

I gave my boss a Sensah 2x12 groupset...the derailleur is shit, I put a Campagnolo 10s that I had in a drawer and the difference was brutal, with a Shimano I would also improve the Sensah......

Sensah has "copied" Sram...and Sram and his FDs don't exactly have a good reputation   

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

True, a complete 105 Di2 can be had for a little more than the LTWOO, not to mention that it's easier to get replacement parts if there's a problem with a bump or drop.

More groupset....wireless for rim brake, Wheeltop EDS

I like Ritchey's solutions better

https://ritcheylogic.com/bike/headsets/Switch-upper-headset



https://ritcheylogic.com/bike/headsets/logic-e-1.5-integrated-is-upper-headset