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Re: The 100€ gravel alu frame from QI-Long actually arrived and its ok-ish quality. Good advice. And I would if knew which headset to order. So many out there and I have not clue which fits and which won't.
August 09, 2025, 10:41:00 AM 		1
Re: LTK266-D-SL, race frame, 680g, <800g w/paint & metal parts (M), fits 35mm+ tires
Quote from: oker_s on November 18, 2025, 12:07:26 AM
i didnt noticed that there a different models! cant find your exact modell on fsa website! can you post a link! i'm using the fsa 55 acr which works just fine

They are similar parts; the dealer catalog has them listed as:
- No 55R ACR - STD, often listed by dealers as No. 55R ACR Standard: Uses 2 TH MR127 bearings (Part No. 13000021000110)
- No 55R ACR - LS, often listed by dealers as No. 55R ACR Low Stack: Uses 1 TH MR127 bearing on the bottom and THMR261A bearing for the top (Part No. 130-0020000010)

Additionally, the Low Stack headset comes with a lower profile headset cover (4.4mm vs. 10.4mm) and an updated C-Ring.

In an effort to keep everyone confused, I *think* the LS headset is replacing the STD version in the lineup, hence the similar part numbers, but IDK, this is FSA we are talking about, which has had at least one other No. 55R headset variant in the past. If you have the STD headset and its working, there is not much reason IMO to get the LS version unless you want the lower stack.
November 18, 2025, 01:13:14 AM 		1
Re: LTK266-D-SL, race frame, 680g, <800g w/paint & metal parts (M), fits 35mm+ tires both are looking great! the black transparanent is the first time its really transparaent   :)


Quote from: koki1176 on December 20, 2025, 02:33:51 PM
Hi everyone,
I also received my LTK266-D-SL and for now everything looks really nice. The frame is very well made, no wrinkles, etc.. I went with custom paintjob, which is ok, not the best but not bad. I would say paint is relatively thin, probably the purpose behind it is keeping the weight down. My frame (size L) weighted in at 780g with derailleur hangers, forks are 330g (uncut steerer), seatpost with all hardware just under 150g...so it is indeed a lightweight frameset.
I assembled bike, but haven't ridden it yet.
Regarding the sizing - at the time I ordered the frame, only S, M, L sizes were available. At 183cm and a little less than 80cm saddle height i think it is okay, but it is a good idea to match the frameset with longer stem because it is not a very long frame in terms of reach. Also, I plan to remove spacers because I think bike will fit me okay if I slam it.
Based on what I have observed till now, it is a really nice frameset ,kudos to Long Teng :)

About the weight, I did not assemble my wheelset yet, but I weighed the bike with brothers' wheelset. With pedals (no bartape), it is 7.3kgs. I find this very good for a Ltwoo erx build & Magene P515 crank and Conti Grand Prix TR tires (are quite heavy). With GP5000s S TR and lighter wheelset, the bike will be ~ 7.0kg, pedals included.

Big thanks to everyone who helped make this thread very useful!

what kind of saddle and cockpit are you running?

I’ve finally taken my SL266 out for its first outdoor rides, and it’s honestly the best bike I own! Fast, comfortable, and a total blast to ride. :) ;D 8)

Last year, I spent most of my time on a steel frame with modern road geometry(in total 17tkm), and I’m impressed that the SL266 easily keeps up in terms of comfort! Up until now, I mostly used it on the trainer to dial in my position since it’s winter here in Germany. The only thing I’ll likely change is the cockpit length. I’m currently running the stock 100mm/80mm reach combo, but I think 120/80mm would be ideal. I’ll see how it goes after a few more miles.

I’ve also 3D-printed a few parts for the LTK cockpit if anyone is interested: adapters for FSA spacers and headsets, direct headset covers, and a 7/8/9-degree wedge for the Wahoo/Garmin mount. Without the wedge, the mount pointed upwards at an awkward angle; in my opinion, it needs to be flush with the stem to look right. Now it looks perfect! I’ll try to post some pictures later.

I’ll take some proper photos of the bike once the weather clears up. By the way, the current weight is 7.4 kg with a full Ultegra group, a standard wheelset (1450g, 45mm depth), 30/32mm GP5000 AS TR tires, and Favero power meter pedals. Next i will try my deeper wheelset with lighter tires and look whats changing
December 21, 2025, 01:16:15 AM 		1