TanTan - Seraph FM121 XC 120mm Full Suspension 2024 model

[Specialf.]

thank you very much for the pictures, from what you can see your frame is different from mine, between the wall where the hole is and the housing of the shock absorber sheath there is just 20mm that allow the sheath to bend to fit into place.
mine on the other hand has no space, the point where the sheath is inserted is against the frame so it does not allow the movement necessary to be able to move, and also the sheath has no space to move laterally.
I made a drastic decision and with a dremel I created a window by widening the hole all the way to the left so that the sheath can reach the cable attachment straight.
a lot of white dust came out.
now it is not perfectly aligned but at least I was able to mount it.
your shock absorber is different from mine I have the air valve and red knob located at the bottom and the blue lever at the top. you will struggle if you have to make adjustments.
mine was mounted on an orbea oiz in the same way.
then I had to invent the teflon bushing that goes to the rear attachment by cutting the original fox ones, I also moved the fork so as to have the screw with the head at the top because I had no way to insert it from below.
this assembly really made me suffer, it's true that shock absorbers are not all the same but in my case the space was really tight, impossible to assemble.
I'll post some photos to make you understand.

[gas0fa]

Have they modified the mould? My wiring outlet is not like this, I don't know if it's because of the size, mine is m

Having the shock absorber like this on my bike, if you put it with the rebound down, I already told you that the bottle hits. The idea of ​​the OIZ shock absorber is very good, but with a little skill and fine fingers it can be done. It's even worse to do it on a Scott Spark or Berria Mako of the new ones...

When do you think you'll go out and try it?

[Specialf.]

I don't know when I'll be able to test it yet, now I'm also having problems with the rear brake caliper.
My initial idea was to mount a 180mm disc with a 4-piston caliper.
I've now discovered that the 4-piston caliper hits the seat stay even with the 180mm disc.
What brake calipers do you mount? and what disc diameter?
do you have a photo of the detail to understand the spaces?
this assembly is making me struggle a bit, I think I won't test it before 2 weeks.

[gas0fa]

The specifications say it supports a maximum of 160 at the rear. Another user had problems with a 4-piston brake disc, talk to the Tantán sales representative. These frames should be prepared for 4 pistons, they will lose sales.

I'm fine with 2 pistons in my departure area.

I ordered a size M with 180 and it's great.

[Specialf.]

The specifications say it supports a maximum of 160 at the rear. Another user had problems with a 4-piston brake disc, talk to the Tantán sales representative. These frames should be prepared for 4 pistons, they will lose sales.

I'm fine with 2 pistons in my departure area.

I ordered a size M with 180 and it's great.

did you mount 180mm with 2 piston caliper? and is it ok?

[gas0fa]

No, I have 160 discs at the rear, and a double piston brake caliper.

[Specialf.]

I asked vivian from tantan today and he confirmed that 4 piston calipers are not compatible, while the 180 disc can be mounted with an adapter. I don't think they even know, they get the information from the experience of us users who assemble their frames.

[gas0fa]

I think that these are improvements that should be made by listening to users. I don't need 4 pistons, but there are some areas that do. I know I'll tell Rose about it. Let's see if they correct it.

I'm happy with the price of the frame. I wanted to buy a Megamo Track, and with this model I decided to buy it at random, and save money.

[tisun]

Guys, my FM121 bike has started making alot of noise lately from the rocker arm area.  It could be the play of the rear suspension shaft, like someone mentioned it’s 7.6mm but it should be 8mm.  I dissembled the rocker arm today and found out the bearings went bad.  I built my bike late December of 2024 and the bearings already went bad.  It means Tantan uses shitty quality bearings there.

I asked Vivian for the size of the bearings so that I can order good quality replacements from the States, but she thought I was asking about the bolts.  She doesn’t know about the bearing.

Does anyone know the size of those bearings?

[Specialf.]

When I assembled the frame I saw that the bearings are of very poor quality. I assembled them anyway but I expect that they will have to be replaced soon. I am still finishing the final assembly but the noise at the shock absorber pin is already making it without having used it even once.


This is the pin they sent me but it makes a lot of noise even without using the bike.

[gas0fa]

I mentioned it. The bearings they come with are of very poor quality. I changed them all.

I have been told that they are still producing with the 8 mm axle, they want it to be as close to 8 mm as possible to avoid problems.

[tisun]

Do you happen to remember the bearing size?