120 Tooth chainring

So where can i get a 120T chainring for a Bicycle

https://youtube.com/shorts/T26HL8S05DI?si=7VAjaXqxXUc2MvrS

Looks like it was machined, I think it would be better with a tensioner to avoid headaches. I feel sorry for anyone going uphill with that.

These are the places i use that https://youtu.be/NQYDuRXE-Ws?si=qGmkQVyLnxPDxa5_ and other ones or better this kind of bike set up
instead multi 2 stage gearing

Screenshot 2025-11-22 at 00-27-48 Rork land speed bicycle - Google Search

Also i getting help from Ai

What for? This is too big even for powerful track cyclists.

Pros use a 200-tooth chainring. Don’t be a wuss.

Yeah ask a bike shop they wouldnt be interested i get a answer we dont sell that

This is the frame design i need to find a frame builder

Are you say 200-Tooth chainring if the small one is a 10 Tooth the the ratio would
be 1:20 but the size of the sprocket about 32"

but if i use 2 X 60-Tooth chaining and 2 X 12T i get a ratio 1:25, or get 3 X 48T and 3 X 12T i get 1:64 Ratio Triple multi drive 3 stage gearing
So i could get this kind of frame i found to get a custom one with a extra shell
Screenshot 2025-12-06 at 22-07-37 (1) M2 Frame set – Velobike
So with this frame get another specially made so the second Bottom bracket shell just above where the part of the frame that follows the cont ere of the frame

I thought you were kidding! I still think you might be…

If you want something like that you’ll have to have it custom-made.

You might also want to see a specialist surgeon about spinal reinforcements for your back…

But i could just do this since People work in Bicycle shops are too arrogant i shoul know so could do this way https://youtu.be/isQdjY1rC8I?si=flmATtZSL-_IBRaR so that part that screws in the 16T freewheel that he weld the both 48T and 16T sprockets together to create a Dulplex idler spocket to the rear forks so now i got to purchase a track fixie can handle welding

Jackshafts are sold on ebay so i can have a 12T/60T, or get a Shimano eagle the one that has 10 to 50 use it as a central idler gear so the 50T so run a high class chain from the 50T on the crank goes to the 10T the smallest cog of the Shimano eagle first chain, then get a second chain run it from the 50T the largest of the sprocket on the Shimano eagle run that highest quality chain to the 10T on the back wheel hub then there you go i dont need a bike shop.

That sounds like it could work!

How will you tension the chain, or allow for disassembly when you need to repack the bearings?

Chains have links take out enough so no chain slack