Chinese Carbon MTB Forums
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Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Okay okay... A little spoiler. But more really only after assembly. Bottom bracket and wheels are still on the way 
December 02, 2023, 11:51:46 AM |
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Re: shipping times from aliexpress
It seems AliEx is now using a private courier at least here in Southern California. All my 11.11 sale items have mysteriously appeared on my front doorstep and usually in the morning. Usually no status updates (besides processed through US customs) until delivered. I'm receiving fewer packages via USPS and more through private courier. I think they have a warehouse somewhere in the Inland Empire (near Los Angeles) and many small sellers are using that as a base for their US distribution for things like wheels and frame sets. It's probably just cheaper for them to send a driver out in LA as opposed to processing things through the postal service. December 04, 2023, 12:31:31 PM |
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Re: Ali express disc brake pads, recommendations
I have had good luck with Cooma brand pads for various Shimano calipers. I always go for resin pads + Shimano rotors and that combo has been great.
December 11, 2023, 11:58:24 AM |
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Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Comment-bombed the previous page to get to a working page 12 ... I was not being intentionally obnoxious, I was being purposefully obnoxious!
December 21, 2023, 02:54:48 PM |
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Re: Consensus on replica frames ??
I'm kinda on the fence about riding a bare copy frame, but riding around on a fake one with the actual brand name is mega cringe.
December 26, 2023, 09:42:13 AM |
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Re: Consensus on replica frames ??
I'm kinda on the fence about riding a bare copy frame, but riding around on a fake one with the actual brand name is mega cringe. This thread has become a thread showing counterfeits. I personally wouldn’t ride one and am generally opposed to them existing. Given the price points, I want the factory and engineers using their limited resources on making a good frame, not a copy of another frame. I also want more people focused on making great products. But I also appreciate the clarity around the motivations of people who are buying these. Getting a good looking bike that doesn't break the bank is getting harder and harder, and if you don’t worry about the weight or actual aero performance, some of these copies look really good from 10ft. I cant argue with the pics. That said, I have seen a fake Pinarello Dogma trying to be passed off as the real thing on a resale site; which was only clear after a friend wasted his time going to see it and noticed some suspicious discrepancies. That’s seriously uncool. December 26, 2023, 10:45:52 AM |
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When this website went down few hours back....
When this website went down few hours back I was like "what am I going to do with my life now" LOL Didn't realize I get some dopamine shots from visiting this site, until it was down for few hours What happened that lead to the website's down time? Just want to appreciate the owners /admins for making this site possible! Ps: Feel free to delete or move this thread admin. December 28, 2023, 05:58:07 PM |
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Re: Consensus on replica frames ??
There is a lot of space between a frame being safe to ride and being the quality you see even on second tier frames from the big brands. It’s worth thinking about the economics of a replica frame selling for $500 painted up as a Factor or Pinarello. I know that it would cost me about $2000-$3000 USD to get a contract manufacturer to make, design a layup for and test a handlebar. I would guess that a frame would be on the order $10k-$12k. It’s probably a breakeven at 50 units at a factory cost of $300 and 30 at less than $200 to make money on a replica frame. To sell 30 frames, you probably need them to pass basic fatigue and safety tests to make sure you can sell even that many. Your don't have much additional budget for development so other than a 3d scan of each frame size to get the shape right and some basic cad work to smooth out the details from the relatively low resolution of that scan, and then work to get the layup good enough to pass the testing. There isn't much budget for additional work. While external tube shape is the majority of the strength of a tube, thickness still matters for stiffness. Because you are using lower quality materials you will end up with thicker tubes, a really stiff bike, and a heavier frame. Its probably been tested enough that it wont break, but will also likely inherit the flaws of the original design because on the outside, it needs to look like the same. In the case of Factor, they replaced their headset assemblies and changed the design since the Ostro VAM was pulled from competition in 2021 due to sheared steerer tubes. Are you getting the corrected versions of the parts on the Ostro VAM replica? Are the parts even of sufficient quality to avoid the problems that led to the re-design? Can these replica makers get the details of a C shaped steerer right enough to be reliable in the long run? What about the headset and derailleur hanger hardware? Potential headset issues also track with the flaws seen on Cervelo replicas which also use a non-round steerer. The Pinarello Dogma F suffers from a surprisingly high incidence of cracked seatstays and chainstays as a result of the asymmetric design. The Velobuild version also seems to have this problem. Plus you get bonus headset problems. An open mold is usually a little more expensive. But, because it's a clean sheet design, they are going to design it in CAD and run the basic FEA stuff and use the results to iterate the design. They have both a good understanding of where / how to adjust the layup and the freedom to change tube shapes to get the performance they are looking for. It looks more generic, but the engineer and designers are incentivized to maximize compatibility with 3rd party components and make the best riding bike they can within their budget because they are looking to secure sales for dozens of bikes with multiple small brands. As a result, these bikes almost always use forks with round steerers and common headset sizes that are easier to design, to make to a high standard, and possible to source from 3rd parties. A branded version of one of these open mold frames from a brand that does development like a Cinelli or a Guerciotti might ask for layup adjustment, will do some additional QC and swap out the generic hardware for branded FSA or Deda versions. They might stick them in a wind tunnel to help find the right handlebar and wheels to sell with the frame. They might also swap the fork. These bikes win big races at the U23 and junior levels, cost 3x as much, but generally speaking most reviewers will say they fall short of the mid-range bikes from the big brands. Is the replica safe to ride? Probably, but the commercial motivations are totally different and there is a reason why the open mold is more likely to have the details sorted. So yes, there is an inherent reason why the replica is likely to be a worse bike. January 01, 2024, 04:19:05 PM |
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Re: Yuanan Carbon fiber wheelsets Year end discount promotion
Removed PLA: I've deleted a couple of your posts. Feel free to speak your grievances, just please do it in a way without insulting people. We can do without terms like "typical shitbag, idiotic, typical internet hypocrite" etc. I realize you probably think that the forum and myself are being "fragile' but that is just the standard we try to maintain here. Thanks for understanding. January 02, 2024, 07:14:34 AM |
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Re: TanTan TT-X38 Build
1000km update. Despite what it looks like in the pic, I've ridden this bike almost exclusively in very cold, very windy and very wet weather. No issues. The slipping seatpost seems fixed. I marked it with tape and it hasn't moved in several hundred kilometres now. So hopefully it's sorted. The brakes are working very well now. The discs and pads took a while to get properly bedded in bc I live in a flat area so I don't brake much to begin with. Add to that the fact that I did a lot of indoor riding, it took some time. But now they work super nice. No squealing. Great modulation. I'm happy with my fit on this bike now. I feel at home when riding it. My impression is that it is fast in a straight line. No question. Cornering is also very confidence inspiring on this bike - also because of the wider tires. It's very stiff. The only area where I see a lack in stiffness is the headtube area under sprinting efforts. I am by no means a powerful sprinter. But particularly when the speed gets higher in sprints, north of 55 kph, I got it to wobble slightly when pulling on the drops. But that's me being picky. In terms of compliance it feels slightly imbalanced. The rear feels quite comfy but the front can feel pretty harsh when going over rough roads - despite the headtube not being super stiff. I guess it's just a result of the tube shapes, the geometry and the fact that this frame probably doesn't have a super sophisticated layup in the carbon. Also, my impression still is that this is not a frame well suited to climbing. Whenever I go uphill, it just doesn't feel that quick. I'm not necessarily slower than on my other bike but it kind of feels that way, despite having my position sorted now. Not sure why that is. It very much feels like a no compromise aero bike in that way. January 03, 2024, 12:18:21 PM |
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