Bike Frame Index - My database on Chinese carbon frames

[Smokemachine]

Bike Frame Index - My database on Chinese carbon frames

I discovered this forum in July and have spent an intense few months reading threads and bookmarking information while researching my own (road) frame purchase. To make sense of it all, I compiled my notes and bookmarks into a database that might be useful to others, especially people new to buying bike frames from China, perhaps doing their first road frame build: bikeframeindex (dot) com

What it is:
A summary of my research comparing popular Chinese carbon road frames on here, Weight Weenies, YouTube and Reddit. Each entry synthesizes what I found across hundreds of forum posts about geometry, quality, reliability, and value. It's of course quite biased toward my own priorities, and i'll underline that I am quite risk averse, but I've tried to capture trending issues and recurring themes from community discussions.

What's included:

• Technical specifications and build comparisons (index page)
• Tire clearance, BB standards, compatibility details (index page)
• Community feedback synthesis/trends, mainly from Chinertown threads (ratings page) with quality and reliability patterns I noticed
• EDIT: A two-tier ranking, between frames which seem to have overwhelmingly strong feedback and other frames, some with mixed feedback or too few entries
  

Limitations:
Some emerging frames like the Lightcarbon LCR018-D aren't included - first deliveries are just hitting the market now, so there isn't enough feedback yet. I've mentioned the new Tideace frame, not more. The selection reflects frames with more history or community discussion at the time I was researching. Some models like the LTK 268-D is “bundled” within the VB thread and has fewer entries but some of the mentions suggest it could be a notch better in terms of build. To call this dataset statistically significant would be wrong, but the level of knowledge and dedication on here and other forums makes the feedback highly credible in my opinion.

What's next:
I plan to add more frames in quarterly batch updates as feedback accumulates. If there's interest, I'd welcome community suggestions for which frames to research and add next. I’ve not considered Gravel frames or TT frames, just because I don’t look for any. I own my dream build gravel bike so road frames was top of mind, but if the site seems to deliver on its purpose- helping others in my shoes, I won’t exclude adding other categories over time.

No commercial interests:
No affiliate links or monetization - this is just my research notes made public. I've added placeholders in the code for Google ads in case I bother with that later, but no plans currently.

Check it out and let me know your thoughts. Constructive feedback welcome. This is an iterative process, meaning that I've published a MVP with the ambition to improve on it continuously.

bikeframeindex (dot) com

Edit/updates:
Actions taken regarding feedback below, which is very helpful in improving the site. Focus was on the "ratings" page where I've scrapped the points leading to the ranking and instead created two tiers which are neutral amongst the frames. Some minor tweaks and typos corrected.

[Pistonbroke]

I quite like it, but don't think you can blame the speed wobble someone experienced riding the Ican FL1 on the frame as it can be caused by a myriad of factors.

[Smokemachine]

I quite like it, but don't think you can blame the speed wobble someone experienced riding the Ican FL1 on the frame as it can be caused by a myriad of factors.

Cheers. Thanks for the feedback, the speed wobble is perhaps a moot point. I recall someone else mentioning in the thread they had descended fast without similar issues. this is the kind of feedback that helps me refine the references.

[Pistonbroke]

Think I've hit 80+kph on mine a few times without issue

[jonathanf2]

How did the SPCycle R088 get a 2.8/5? Despite some build installation issues, it's been a solid frame overall. I'm not sure I can trust your rating index. You give frames with little data higher scores. Makes no sense.

[raisinberry777]

Great idea, but I'd avoid assigning numbers because it only adds to confusion. Given QC can be all over the place, it's difficult to compare one to the next.

[Sakizashi]

Are you using AI to read the posts and compile the summaries? Curious to know what model you are using because the summaries are awful.

Also there are a ton of mistakes here. For example, the LTK-266-D and the LTK266-D-SL are two different frames with different geometries, so the specs are wrong. Your summary also lists as a negative specific feedback I gave to someone regarding their potential fit with that frame. It is not a generalized negative at all. The newer ChatGPT models should be able to recognize context like this.

There are similar issues with the other frames as well. Serious issues like misaligned thru axles (on the top choice) and persistent headset issues are given the same space as..."carbon not being sanded down on the inside" when...well, not sure what sanding is ever done INSIDE a frame (the much lower rated Hygge Model S).

While the idea has potential, the current rating systems and site demonstrate a distinct lack of understanding of these frames and their price points, and are riddled with nonsense. Overall, it's a net negative to someone trying to understand the landscape of these frames.

[Smokemachine]

How did the SPCycle R088 get a 2.8/5? Despite some build installation issues, it's been a solid frame overall. I'm not sure I can trust your rating index. You give frames with little data higher scores. Makes no sense.

Hi,

Thanks for the feedback. I know you're a big fan of that frame, and it's great it has worked out well for you. There have been some QC issues noted but perhaps i've been too harsh. I've decided to scrap the points all-together and just organize the frames into a top-tier and mixed-tier. Users can make up their own minds. Some things i've bookmarked are headset play (common amongst other frames too), this (which got replaced - but not great QC unless damaged in transit) https://chinertown.com/index.php/topic,5562.msg80652.html#msg80652 and then Tiny Dinosaurs headset issues.

Fair point regarding the frames with little data, hence my revision of tiers. I have assumed "OK until proven otherwise" and thence weighed some frames with more data points, but genuine issues, down more.

[Smokemachine]

Great idea, but I'd avoid assigning numbers because it only adds to confusion. Given QC can be all over the place, it's difficult to compare one to the next.

Thank you for the feedback, and point taken. It helps me look at the site from different perspectives. I'll try to redo code for the site today and change it into a trusted category and mixed category which both are neutral as to the frames relative position. If you see other areas of improvement i'd love to know.

[Smokemachine]

Are you using AI to read the posts and compile the summaries? Curious to know what model you are using because the summaries are awful.

Also there are a ton of mistakes here. For example, the LTK-266-D and the LTK266-D-SL are two different frames with different geometries, so the specs are wrong. Your summary also lists as a negative specific feedback I gave to someone regarding their potential fit with that frame. It is not a generalized negative at all. The newer ChatGPT models should be able to recognize context like this.

There are similar issues with the other frames as well. Serious issues like misaligned thru axles (on the top choice) and persistent headset issues are given the same space as..."carbon not being sanded down on the inside" when...well, not sure what sanding is ever done INSIDE a frame (the much lower rated Hygge Model S).

While the idea has potential, the current rating systems and site demonstrate a distinct lack of understanding of these frames and their price points, and are riddled with nonsense. Overall, it's a net negative to someone trying to understand the landscape of these frames.

Hi,

Thanks for the feedback. I am not using an AI model for this but reading the threads and taking notes/bookmarks myself. I have run a Python script (via beautiful soup) to scrape the threads into .txt files which makes reading a lot easier to do. Once I came across something noteworthy this approach allowed me to CTRL+F the entire thread given it's now in a combined .txt, in order to follow 1) the user/poster 2) topic by keyword(s) and look for a conclusion/data points.

The naming mistake will be corrected, I didn't add "-SL" with regard to that frame, but not sure what you mean by specs being wrong as it's BB86 and accepting 35c tires, as per what i've inputted on the website, or hwhat did I miss on this frame? I decided not to (as I also wrote on the site) categorize geometries or comment on them, since fit is highly individual; Regarding the drawback reference however, I got impressed by your level of knowledge & opinion on geometry (to even later on make references to 2010s Pinarello lines and some Liv bike) that I considered the fit question noteworthy. I've removed the comment, it doesn't belong there.

The 1056 for instance suggests consistently good user experiences to deserve a trusted rating in my book. The Hygge sanding reference was sloppy on my end, I (again, CTRL+F) looked up sanding and bookmarked the wrong comment & link for reference, when I had this https://chinertown.com/index.php/topic,4305.msg49861.html#msg49861 comment in mind, about having to sand the clamp due to slippage.

I've mainly worked on this website during short evening windows when the family go to sleep, and losing my train of thought begs for some mistakes along the way. Glad to get yours and others feedback to iron those out. My mindset in general is to publish work after a few iterations, and sort the issues along the way, rather than iterating forever. A few friendly people shared some feedback with me along the way which was very appreciated and helpful.

Whilst speculative buyers (my use case) have varying degrees of knowledge (I didn't even know B2C frame buying from China was a thing three months ago!) few people seem to be as invested and experienced as yourself, so you get the target audience. You probably don't need this kind of resource, whilst others might find some of it helpful on their journey. It takes a lot of time and effort to compare basics like BB standard, frame tolerance to reading through long threads to synthesize various data points into a summary. The initiative might never get your support (i came to think of this brilliant scene "tell me about your dream mosque?" https://www.instagram.com/reel/C11465SOSy3/?hl=en), but I 100% see the potential for a net positive, with continuous improvement.

Will try to make updates asap based on yours and others feedback.

[klrdd]

I admire your ambition but I'm not confident about your scraping-based note taking system if you're missing the crucial facts (let alone the subjective pros and cons) of a frame like the LTK266-D-SL even now. @sazikashi has been regularly updating the original post in that thread, for instance, and it has all the information a website like yours should need. Even now you are mixing up the bb standards! BB86 is not T47. The biggest pro of the frame is the price-quality ratio and the WEIGHT which makes it the leader in its class. Cons might be aero-related for many buyers. Weight on hands? Irrelevant.

Im not sure this site is ready to be made public given the major errors for even just one recent open mould frame. If you're doing this for yourself that's great. But you did admit a lack of knowledge about bike buying and building that makes it hard for you to judge your own errors of commision and omission.

You're on to something with this database idea overall, and I like the design principles, but a quick glance based on my own knowledge of a particular frame suggests it's now more of a misinfo source than something 'opening up the black box' of china frames.

My suggestion is that for now the public facing site should be a list of popular frames, paired with industry-suppllied spec sheets, with links to their respective factory pages as well as their respective chinertown discussion threads. You should not editorialize from those threads: instead, prospective buyers should be encouraged to follow the link to read the thread themselves. It doesnt take so much time, and buying a frame is a major purchase decision anyways. Good luck with this project.

[Cnasta]

Thnx, love the work you (must have) punt in. Unfortunatly I'm not able to reach the site now. Getting a 'page not found'. Hope you're not discouraged by the slightly negative comments

[jonathanf2]

Users can make up their own minds. Some things i've bookmarked are headset play (common amongst other frames too), this (which got replaced - but not great QC unless damaged in transit) https://chinertown.com/index.php/topic,5562.msg80652.html#msg80652 and then Tiny Dinosaurs headset issues.

At least SPCycle sent a replacement frame after verifying there was a structural issue with that particular setup. I remember a Winspace frameset had a giant void in the BB shell and ghosted the customer, while a TanTan X-68 frame had an exploding fork which could have resulted in actual death. If you want to get a better assessment of frames, just straight up read every thread. It's like relying on Cliff Notes as opposed to reading the actual book! 

[Cnasta]

At least SPCycle sent a replacement frame after verifying there was a structural issue with that particular setup. I remember a Winspace frameset had a giant void in the BB shell and ghosted the customer, while a TanTan X-68 frame had an exploding fork which could have resulted in actual death. If you want to get a better assessment of frames, just straight up read every thread. It's like relying on Cliff Notes as opposed to reading the actual book! 

Passed a lot of exams on cliff notes 

[Sakizashi]

Hi,

Thanks for the feedback. I am not using an AI model for this but reading the threads and taking notes/bookmarks myself. I have run a Python script (via beautiful soup) to scrape the threads into .txt files which makes reading a lot easier to do. Once I came across something noteworthy this approach allowed me to CTRL+F the entire thread given it's now in a combined .txt, in order to follow 1) the user/poster 2) topic by keyword(s) and look for a conclusion/data points.

The naming mistake will be corrected, I didn't add "-SL" with regard to that frame, but not sure what you mean by specs being wrong as it's BB86 and accepting 35c tires, as per what i've inputted on the website, or hwhat did I miss on this frame?

The LTK266-D-SL frameset uses a T47i BB. The older frame uses a BB86. The 266-D-SL also has a different geometry than the 266-D, though confusingly, this is changing as they appear to be consolidating molds over there. Your scraping method has completely missed those details.

I don't mean to be a complete ass, but information like what you are putting together is only useful if it's accurate and includes relevant details. The challenge, though, is that it's tough to sort through the mess because little of it is straightforward.

For example, weights might be taken bare without hardware, bare with hardware, painted without hardware, or painted with hardware. Ultimately, what you care about is the painted, verified frame weight, but that's hard to find except from buyers here and often this is in photos of the bike on the scales.

Similarly, 35C is a statement of the max tire and wheel size the frame was designed for, but that does not indicate tire clearance. Rather, it's a naming convention that comes from 700c, 650b, etc, where [Nominal Wheel Diameter w/ tire]x[TireSize][Bead Seat Designation]. There are multiple tire clearance standards to be aware of. ISO4210 houses the major one of note. For road racing bikes, this is a minimum of 4mm clearance; for all other bikes, it's 6mm. When a manufacturer says its 35C tire, they mean the maximum tire size is 700x35C, but aren't stating which clearance standard they are using. 2mm on each side is a pretty big difference in room.

You should also consider whether the drawbacks of a frame can be easily resolved. A rubbing headset cap is annoying, but it's resolvable by a buyer; a badly misaligned thru axle is the kind of mistake that sends the bike to the trash. Additionally, some frames have standardized headtube dimensions and take regular round 56mm covers. Frames like these can be easily upgraded with higher-quality parts from major component suppliers. This is also an advantage for frames with UDH.

If you're determined to create a guide, also consider organizing the frames by price and use. Even within road bikes, endurance and performance geometries are distinct and meaningful functional differences. The easiest way to do this is to evaluate if a frame's geometry is closer to a Tarmac SL8/Giant TCR/Trek Emonda or a Roubaix/Giant Defy/Trek Domane.