How many of us are waiting for the fm121 to be replaced under warranty? Have they given you any timeline? I love riding it but there are so many issues to resolve. I always knew the rocker arm was poorly made. From the get go I could push a couple bearings in and out with my fingers. I think this led to sloppiness and maybe the cause of the cracks in my rear triangle.

I’ve got races coming up and I really want to ride the 121 but I might just buy a frame elsewhere. It’s too bad because I think the geometry is spot on.

How long have you been using this frame?

My rear triangle (around brake mount) was cracked in first ride, when i tune rear shock pressure

I rode it less than 10 hours from August to early October. I knee injury slowed me down and shut me down completely with surgery in mid October.

Are you still using the frame?

Hi, I'm the unfortunate owner of that broken frame.
The frame literally exploded.
I can consider myself lucky to be here to tell the story.
I didn't know they'd removed the model from the FM121 website, but I knew they were modifying the link between the two wishbones and the shock absorber.
I received two frames, each different from the other, even in the shock absorber mounting area. One of them had such a tight fit for the cable that I couldn't fit the shock absorber.
If you want advice, choose another seller, otherwise you'll risk your health.

Oh no! My swing arm is cracking just behind the brake mount post!

I’ve been following/posting on another thread related to this frame. It ticked most of my boxes for a new frame so I bought one. Mostly I’ve been happy with it although I don’t have much time on it with my recovery from knee surgery. On the other thread an owner of this frame experienced a catastrophic top tube failure. Before I knew this I contacted tantan about why the frame no longer existed on their website. I did this because a friend of mine really liked my bike and was considering buying one. TanTan responded that they are redesigning the frame to add strength and that the new version would be out next summer.

Anyone else have this frame ? Any issues?

Hello bangacan,  I have installed the RS bearings.

What psi are you running? Even at 100 psi the rear swing arm doesn’t move nearly as much as it should. Something just doesn’t seem right about this frame. I did change all the bearings but that didn’t really do much

This frame has flex points at the seat stays, so you won't be able to move it unless you apply a lot of force, and you'll only be able to do so with your own weight.

I was also scared when it arrived and saw that it wouldn't move. Then, if you stop and think about it and see the angle the seat stays give, it's impossible for them to move.

Once you put the frame and wheels on, you'll see how it flexes with your weight without any problem.

The plastic didn't come with it for me either; it came with a thick cable tie holding the two parts together.

I'll give you the advice we talked about: before assembling it, change all the bearings. They probably even arrived painted... the frame is quality, but the bearings are very, very poor.

Does it matter the bearing type, like “du” or “rs” ? Seems like the important thing is the size, like 6800. Seems hard to find the du bearing. Other designations are easier to get like the “2rs”.

Problem might be these bearings. Already corroded and gunky

I have a tan tan frame. Recently discovered that a linkage bolts fell fell out. I’ve contacted tan tan but does anyone know if hardware like that is available in the states?