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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? I finished building the TT-X68 already two weeks ago, but it was very busy, so here is my update.

Carbon quality seems really good. I had zero issues with sharp edges or anything similar. The areas for the break mounts were all sanded down really well and also with the BB and the headset I had zero play/issues. The paint quality is so far superb and I'm more than happy TanTan changed there mind on the color customization of this frame.

I use a full Ultegra DI2 Groupset incl. 160mm discs front/rear, except for the crankset. As most of you can tell, I'm using a Magene PES505 in 165mm. In combination with my Novatec R4, some RideNow TPU Tubes and the Pirelli Tires the whole bike is 7152 g. The bottle cages are still in transit, but they will add only about 25g. It's a Size 52.

For my first chinese frame experience, this was quite a good one  ;)

The only thing I do not recommend is the computer mount. I think the angle of this is too steep, but I already found an alternative.

February 10, 2025, 04:11:29 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? Finally I'm back on the road. Fork took long to arrive, but the paint color matches perfectly and I survived my first two short rides 8)

Put some titanium parts, new solid oil bearings (way cheaper than CS https://www.kugellager-shop.net/acb495h6-5-bo-max-sl-steuersatz-kugellager-vollkugelig.html) and a lighter wheelset plus cassette on the bike which is now about 6,85 kg with everything on. I'm still loving that color, it really shines and pops in the sun!

Wish me luck, that everything works out in the future. It really rides lovely!

August 13, 2025, 10:44:32 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? Received my frame today. Ordered from tantanbicycles.com for $719 -$10 coupon 'ROADBIKE' + $180 shipping to Florida. Ordered July 14, it shipped on August 20, then handed over to UPS in California on Sept 9, ground shipping to Florida and received Sept 15. I was not billed for any tariffs.

I got the chameleon white and it has a nice pearlescent shine to it. Brake mounts, BB face, headset bearing cups all look fine.

Weights:
878g 52cm frame, derailleur hangers, no axles
422g fork, uncut
340g 400 x 90 mm handlebars
154g seat post and saddle clamp

I'm going to build it up with:
$1,087 Ultegra Di2 R8150 groupset
$338 XCADEY Ventus carbon crankset power meter
$608 EliteWheels Edge 50mm deep
$300 other parts
$889 frameset
===
$3,222

September 15, 2025, 08:35:32 PM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes?
Not looking as bad as other ones I seen where the paint covers the whole of the BB sleeve. Looking at a genuine SL8, the Specialized bonded BB threads don't have an outside lip on the sleeve, so when the BB gets perfectly machined you can see the bare carbon. On the X68, to get to the carbon you'll have to go beyond the alu sleeve lip. I may be wrong, would love to see a frame after being faced
I'm waiting for my X8 details to be finalized. Still not sure to get it on that lovely British racing green or bare carbon and get creative. Either way I'll be gently facing the BB and go at it on the brake mounts with diamond cutting bits for the facing tool

What do you think of this one ?

September 16, 2025, 04:29:38 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes?
Is that an x68 faced? Thanks for the pic. So if that far is required to achieve 68mm spacing it means Specialized also got rid of the sleeve lip. I'll be getting the Vernier callipers on it then. Cheers

Not a x68 but a SL8 like. It was only to show what it looks like.

September 16, 2025, 07:14:19 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? Got an update on my replacement fork, it got painted and will be sent within the next days.
Hopefully my built will be complete soon.

September 17, 2025, 03:55:13 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes?


October 23, 2025, 02:26:27 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? Hello to all
Here is my contribution to all X68 fans.
Currently I have 2 X68's at home. Specifications below:

Frame: X68 size 44
Handlebars: Seraph Carbon handlebar 36cm
Wheelset: Farsports 40mm with Carbon spokes
Groupset: Shimano 105 Di2 12 speed
Crankset: Shimano 105 50/34, 170mm
Chain: Shimano 105 12 speed
Casette: 16-30 Shimano / Miche (for my son's race limitation)
Saddle: Ryet
Pedals: Shimano Ultegra
Tires: Continental GP5000 30mm
Tubes: Tubolito TPU
Bike weight: 7.0 KG !

Frame: X68 size 56
Handlebars: Seraph Carbon handlebar 36cm
Wheelset: Zen Wheels  50mm with Carbon spokes (1.145g)
Groupset: Shimano Ultegra Di2 12 speed
Crankset: Shimano  Ultegra  52/36, 170mm
Chain: KMC black 12 speed
Casette: Goldfix 11-34 black
Saddle: Berk Lipa
Pedals: Assioma UNO
Tires: Continental GP5000 30mm
Tubes: Tubolito TPU
Bike weight: 6,95kg

Regarding assembly: none of above 2 bikes have/had any issue at all. Neither with cable routing, neither with facing of brake calippers.  The guy that assemblied bikes was actually impressed about the quality of the frame. He stated, that many original brands are much worse in terms of assembly.
On 1st bike stem bolts were oxidised after 2-3 rides and they have sent me replacement.
On 2nd bike, they have sent me silver stem screw which really does not fit to black handlebar. But also that was replaced by them as well.
One more thing that is noticable is that both bikes were ordered same color (white pearl) but mine is far more »snow« white than my son's. Paint guy must have had bad day=) But still, they both look great.
Regarding ride & handling:
The 44 size bike was used by my son. He did aprox 4.000km in 2025, mostly racing. He even crashed 3 times this season, but there is no damage to the frame at all (not counting small scratch at rear axle:/)

I owned  S-works Tarmac SL5 disc before. Meaning I am not switching from some bad bike to X68, but still the difference is noticable.
X68 is more stiff (probably also due to thruaxle system instead of QR and SL5 being used for 9 seasons) especially in front end, but at the same time also more comfortable (also switch from 25mm to 30mm tyres does the job).

Haven't done many rides yet, so that's what I can tell so far.
 Feel free to ask if you have any more specific questions

November 04, 2025, 01:05:44 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes? Hello All,
I have been lurking and "researching" for a frame as I updated a bike with 105 mechanical that only had about 350-500 miles on it and the wheels.  The group set  and wheels have been in boxes for 2 years and decided to buy a used frame, but came across this site and decided to buy a clone for the hell of it!  I appreciate all the information from everyone to help each other out.  I decide on a Seraph and purchased via PayPal on Sat Nov. 8th.  For anyone interested, I will return the favors you have given me in the timeline, pictures of the frame, interior of the frame, etc...

November 11, 2025, 02:46:00 AM
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Re: Seraph Bikes Superlight 836g X68 - Alternative to SL8 Fakes?
Received my frame. Six weeks since ordering to UK
Size 52. 865G frame, 425G uncut fork in translucent blue. Dark until the light hits it. This is a mist of blue on a raw frame with glossy finish
Paint looks well done, no missing spots or anything. There are a couple of tiny dimples on the carbon here and there, as if no fillers have been applied. It seems only cosmetic and I’m not too worried. You’ll get what you pay for, some are lucky some are not. Apart from that, fork and all races look clean and smooth
BB with no overspray and threads all clean and good. Anyway,I did chased and slightly faced
Brake mounts as expected needed facing. All done, with before and after pics
Now waiting for a set of Zen wheels, carbon cranks from DFS and Ultegra groupset at some point. No hurry during winter
I can provisionally say the Hylix 15 to 0 offset fits. Only 0.20mm narrower that the Tan Tan post. I tested it with a set of wheels, no cranks and bouncing up and down full force without carbon paste
Fingers crossed it works since the inline post will help achieving the perfect fit

Thanks for the pictures and update!

November 12, 2025, 05:23:36 PM
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