Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes?

[Tpower59]

I have a creaking sound when pushing > 250W in the bottom bracket area
More a squeezing noise
Already changed BB with brand new Ultegra one : still there
Greased everything on my Magene P515 crankset
Still there
Happens up or down on the saddle
Pedals greased
I am getting mad

[glepore]

I replayed your video four times and it does look like only the BB is moving.  If you are seeing movement in the BB housing area you might want to send them another video showing it.

The only way a bb would rock like that is if the sleeve was moving and/or the threads were shot...

[fhill]

I replayed your video four times and it does look like only the BB is moving.  If you are seeing movement in the BB housing area you might want to send them another video showing it.

I've  done that. Ofc it seems like only the BB moves as you can't see the aluminium insert. I'll post that video later

[kvnp]

It seems that they will release the SL8 2.0 aka SL9. They published pictures on their IG page.

[rosteven]

I've  done that. Ofc it seems like only the BB moves as you can't see the aluminium insert. I'll post that video later

Not saying that you are not having the issue as you described, just that if all anyone sees is the BB moving how do you expect TanTan/Seraph to evaluate and respond accordingly to your issue?  Anyway, good luck...

[fhill]

I have a creaking sound when pushing > 250W in the bottom bracket area
More a squeezing noise
Already changed BB with brand new Ultegra one : still there
Greased everything on my Magene P515 crankset
Still there
Happens up or down on the saddle
Pedals greased
I am getting mad

Have a check on the bottom bracket housing...

[LowPaceKingdom]

I have a creaking sound when pushing > 250W in the bottom bracket area
More a squeezing noise
Already changed BB with brand new Ultegra one : still there
Greased everything on my Magene P515 crankset
Still there
Happens up or down on the saddle
Pedals greased
I am getting mad

FAST and easy
DO THIS:
Grease through axles AND FRONT FORK
 FRONT AND REAR  (WHEEL - FRAME- through axles - threads)     CONTACT POINTS  .
!!!! DONT USE CARBON PASTE IT DOESNT WORK!!
 u need "real Grease " something like Botttom Bracket GREASE

MORE WORK:
Grease and clean PEDALS and tigghten them on correct Torque
creaking comes when u push wats while sitting on your Saddle?:
Yes ->>>> issure comes fro msaddle clean and Grease

NO ->>> saddle is fine


did it help?

[fhill]

Here you can see the aluminium housing moving...

[Serge_K]

Here you can see the aluminium housing moving...

i would put the frame at 90 degrees, and pour super glue between the frame and the sleeve. flood the zone. Super glue is very thin. if you flood the whole area, it should hold. obviously, dont put glue on the threads...
afaik, you cant use epoxy, unless you find a super liquid epoxy. but honestly super glue is super strong.
given the tiny amount of play, i wouldnt worry too much about alignment.
Shimano makes plastic BBs because tolerances on bikes have been atrocious forever. a fraction of a millimeter shouldnt matter too much. You did buy a clone from a seller with bad reputation, so using super glue feels legit.

[fhill]

i would put the frame at 90 degrees, and pour super glue between the frame and the sleeve. flood the zone. Super glue is very thin. if you flood the whole area, it should hold. obviously, dont put glue on the threads...
afaik, you cant use epoxy, unless you find a super liquid epoxy. but honestly super glue is super strong.
given the tiny amount of play, i wouldnt worry too much about alignment.
Shimano makes plastic BBs because tolerances on bikes have been atrocious forever. a fraction of a millimeter shouldnt matter too much. You did buy a clone from a seller with bad reputation, so using super glue feels legit.

Sounds like the best idea I heard until now.. I was thinking about letting it repair professionally... But will cost half the price of the frame at least.
And yeah I learned my lesson about TanTan and their reputation 😅

[joegal]

The X68 is back - now resembling the SL9.

[dovh]

Here you can see the aluminium housing moving...

I have a bad feeling that the same fate awaits my replacement frame, so I'll start looking for another one while this bike is still rideable. 😞

I really love the feel and geometry of the SL8, so if any of you have suggestions for a good replacement, I'd really appreciate any advice. But yeah, im done with  TanTan too, never again.

[heymarius]

Haha, I'd still want to see a few long-term ride reports before calling it a better alternative. Geometry is only part of the story.

[fhill]

I have a bad feeling that the same fate awaits my replacement frame, so I'll start looking for another one while this bike is still rideable. 😞

I really love the feel and geometry of the SL8, so if any of you have suggestions for a good replacement, I'd really appreciate any advice. But yeah, im done with  TanTan too, never again.

For me, it happened on both frames... The one I bought in 2025 and the replacement I got in early 2026

[Serge_K]

Haha, I'd still want to see a few long-term ride reports before calling it a better alternative. Geometry is only part of the story.

people are reporting BB sleeves moving around in the frame. Call me old fashioned, but if you have to glue stuff yourself to be able to ride the frame, alternatives are badly needed. It's nothing new, but the number of lemons that tantan has been shipping over the years is impressive, it's almost as bad as airwolf. I like value driven purchases, but would i buy a tantan to bomb down alpine mountain passes? Just no. Crashing hurts.
That said, people will keep buying SL7-8-9 clones / fakes no matter what, and i suspect tantan is making a ton of money catering to that market.