Hey everyone,

Has anyone here ever ordered just a standalone fork from Seraph, or tried pairing a Seraph X68 fork with a Yohobike (or other supplier’s) SL8 frame? Did the internal routing ports and headset crown race drop in nicely without fitment issues?

I’m currently about to start building up my SL8 which I brought from Yohobike.

When I took it in to the mechanic, he noticed a gouge on the steerer which extends from the hose port slot. Being concerned, he asked me to send it to a carbon expert for their opinion. As it was going to be a hassle anyways, I ended up sending the frame along for inspection.

The carbon specialist is certified and uses aerospace/military-grade NDT methods based here in Australia.

Upon receiving the report, it says that the frame laminate came back in acceptable condition, bar some minor porosity in the down tube. However the fork came back with large areas of manufacturing voids in the steerer, 17 in total throughout the length. And there are two smaller voids in the legs too.

This confirms that that the fork should not be used.

Since Yohobike seems hard to reach now, I’m looking to source a replacement fork from Seraph instead. Especially as there were improvements made after the earlier incident.

Appreciate any insights!

Canu please Mark the spots iwith Paint in the Screenshots where U think IT IS critical

JUST FOR INFO

Mine ttx 68 (white waved wheels)

alrdy    1000km on it
speed:  25-33km/h
           95% road / used pavement cracks / fixed cracks
           5% gravel

issues is BB is creaking on higher watt output (but not always)  -   will check if bb is greased ......
Handlebar spacer rubbing / grinding  on  frame so the paint in a little area  under the spacer  is gone / scrachted

no fatal issues so far

!!!UPDATE!!! BB IS NOT CREAKING ITS HANDLEBAR SPACER TIP is Rubbing on Carbon frame when sprinting heavy !!!!!!!!!!!!

Hey everyone,

I’m currently riding the Shimano GRX RX810 2x11 groupset with the CN-HG701-11 chain and the GRX 810 derailleur pulleys . My current pulleys have 11 and 13 teeth.

https://www.bike-components.de/de/Shimano/Schaltraedchen-fuer-GRX-RX810-11-fach-1-Paar-p88650/

I came across ZTTO derailleur pulleys and I’m wondering if anyone has experience with them and whether they’re compatible with the GRX RX810 groupset. Here’s the link to the ZTTO pulleys I’m considering:

"https://de.aliexpress.com/item/1005005753137032.html?spm=a2g0o.productlist.main.9.6ea3oCgVoCgVC6&algo_pvid=beefef99-1fba-4047-8852-b566be89b5f0&algo_exp_id=beefef99-1fba-4047-8852-b566be89b5f0-4&pdp_ext_f=%7B%22order%22%3A%221216%22%2C%22eval%22%3A%221%22%7D&pdp_npi=4%40dis%21EUR%214.35%210.99%21%21%2133.44%217.65%21%40211b680e17416292493304109eabae%2112000034229276252%21sea%21DE%210%21ABX&curPageLogUid=dfxwtQ5PhBWH&utparam-url=scene%3Asearch%7Cquery_from%3A"

Are the ZTTO pulleys compatible with the GRX RX810 groupset? How is the shifting performance with them? Are there any noticeable differences or disadvantages compared to the original Shimano pulleys?

Looking forward to hearing your thoughts and experiences!

First Test Rides with the Tantan TT X 68 – Clipless Pedals, Comfort & Di2 Shifting

Hey everyone,

I’ve done two test rides on my new Tantan TT X 68, each around 30 kilometers. Here are my first impressions:

First Ride:
The goal was to get comfortable with the bike, especially since it’s my first time riding with Shimano SPD-SL (blue) clipless pedals.
I rode at a relaxed pace, did a few sprints, and tested the gear shifting.
Tire pressure was around 3.5 bar, and the ride was extremely comfortable.
Shifting issue (Shimano Di2 105): I had some trouble shifting to the highest cog – maybe I pressed the wrong buttons. Solution: I reprogrammed the button layout in the app → now the shifting works perfectly!

Second Ride:

I felt much more confident with the clipless pedals.
Tracked the ride with the Adidas Running App.
Tire pressure this time was 6.5 bar, still comfortable.
I’m very cautious in corners, as I want to avoid any crashes – especially with clipless pedals, it’s something new for me.
The first 15 km didn’t feel much faster than usual.
Pace: about 2:00 min/km (~30 km/h), estimated Zone 3 (FTP).
I have to push myself, but I can maintain the pace for a long time as long as I’m well-rested.
On the way back: After 15 km, a random cyclist appeared, and I was able to draft behind them.
Speed test: We held a pace of 1:45 min/km for about 2 km, and I was able to keep up very easily – even while chewing gum!

Comparison to the ROSE Backroad GRX810 EQ Carbon:

The Tantan TT X 68 feels significantly lighter and is a bit faster, especially in sprints – likely due to the clipless pedals and the overall sportier setup.
Design: The Tantan looks way better to me and has a very modern and sleek appearance. It stands out massively – and in a positive way! I’ve already gotten several looks and compliments for it.
Shifting: The electronic Di2 shifting makes the Tantan feel smoother and faster.
ROSE Backroad: My ROSE Backroad is definitely more of an all-rounder bike – with mudguards, a durable frame, and more suited for longer, more relaxed rides. I’d say the ROSE is better for versatile touring, while the Tantan focuses on a more sporty approach.

Opinion from the Bike Shop:
I also got the opinion of a guy at a bike shop. When he looked at the Tantan TT X 68, you could see that it really put a big grin on his face. I think that says it all.

What are the torques wrench for front and rear carbon rail saddle ?

Thanks.

these infos are from vivian tantan,
 
all Numbers in Nm

Seatpost             8-10
Bottlecage             4
Brake calipers  : tantan dont have info also spcialized doesnt have on their manuual , i recommend u to go with 4 - 6
Handlebar           6-8
Fork Expander     8-10
Through Axle    12-13
Saddle both front and rear   8-10
UDH/SchaltWer     4,5
headset bolt screw : also no official info it  is about -  1- 2 Nm till u have no play betewen fork and frame

beaware torque charts are little different from original sl8 page
example fork expander sl8 original is 5 NM

I’ve taken a few pictures of my bike as a reference. The gaps around the headset look pretty extreme in the photos (angle).

During installation, I didn’t have any issues, especially not with the compression ring (was flat). I tightened the headset bolt very lightly, around 1-2 Nm. The result is that there’s absolutely no play between the frame and fork – I’ve tested it by pulling both brakes and moving the bike back and forth.

The steering also feels smooth and easy, exactly as it should.

Everything "feels" as it should, as if the bike is functioning exactly how it was designed to.

Other forum Photos of Gap Issue i assume this are all original SL8

https://weightweenies.starbike.com/forum/viewtopic.php?t=172467&start=4740

https://weightweenies.starbike.com/forum/viewtopic.php?t=172467&start=4770

Looks nice! Could you tell the weight of your build (with and whitout wheels)? I'd like to know if I can make it 6,99 kilo with 11sp ultegra Di2 and 1230gr wheels

Also, what saddles are that? Do you know the weight of those? They look nice!

And last question: Is that color chameleon white, or pearl white?

sry mate alrdy builded the bike up   

 full build / sd2000 saddle  / without pedals / frame size 54 :                          7,175 Kg

Weight of the Saddle  SD4000  no bolts                                                             140 gr 
saddle link "https://www.seraphbikes.com/3d-printing-technology-honeycomb-design-breathable-full-carbon-fiber-road-bicyle-saddle-sd2000-sd8000-mtb-bicycle-gravel-saddle-p5826463.html"

u can definitly safe weight at

Tires:
my tires Conti ultra sport 3 ("budget training tires")  700 X 28C /                2x    295 g   
Innertube:  conti. butyl tube

Wheelset: titanium hub / Carbon spokes  /                                                         1305g
Link "https://www.seraphbikes.com/700c-carbon-wave-wheelset-50x28mm-disc-brake-gravel-carbon-spoke-1305g-ratchet-3654t-ceramic-titanium-color-hub-road-bike-wheels-p5847395.html"

colour is "Chameleon White YS9145" 

Di2 105 vs ultegra vs dura ace