I had a problem getting the ER9 LTwoo calipers+140mm adapter plate to line-up properly using 140mm rotors on the rear. I tried it on 2 different framesets and both of them would not line-up properly. The strange part is that I had no issues running 160mm rotors with the Ltwoo calipers+adapter plate. I ended up switching over to ZRace XG calipers which required no adapter plate. I literally just unscrewed the Ltwoo calipers and screwed in the Zrace calipers, plug-n-play style. They work well enough with no issues on long descents.

I have to say that I strongly discourage the use of this disc rotor. It completely neglects mechanical simulation and the bracket itself is prone to fracture. Furthermore, the pattern design is a mess, with hollow patterns distributed unevenly on several concentric circles. As a result, the friction rate of the entire disc rotor in the radial direction cannot achieve consistency, leading to the formation of grooves on your brake pads... It's a design that leaves me speechless.

The issues mentioned above are not exaggerated claims but rather highly probable events that have occurred multiple times on Chinese forums. I don't want anyone else to become a victim of this disc rotor.

The attachment contains the reply I received from Ltwoo's official support regarding the waterproof performance of the EGR. The main point stated in the response is that the waterproofing of the EGR has been improved compared to earlier versions (at least according to their official statement).

... Do we have any idea where the ingress is? ...

Unfortunately, I don't have the physical EGR item with me, and my friends are also unaware of the specific areas where potential gaps may exist. All repairs are handled by Ltwoo officially.

However, I have a suggestion that may not be fully matured. Perhaps applying some waterproof spray meant for outdoor clothing on the outer layer of the rear derailleur could be helpful?

Hi @FabioZang,

many thanks for your feedback! Question is, when did they have updated the version in order to be more waterproof - if they did at all?

If they did, how to ensure to get delivered the updated version and not the previous one. I have reached out to Ltwoo via Emai, but didn't get a response. Via Aliexpress I didn't find a "chat/message button" to get in contact with the "official Ltwoo store" in order to ask them those questions.

You might have more luck when writing to them via email in your language? Could you give it a try?

Are there similar forum chats in China about this topic?

Many thanks, Dennis

I will try to ask them. Usually, I can contact them directly through platforms like Taobao or WeChat, without the need for emails. However, based on the feedback I received from secondary distributors in the past, the new versions of the EGR did not improve the waterproofing performance. In special cases, it is necessary to disassemble the rear derailleur and manually apply some waterproof sealant. But such an operation may result in the loss of warranty eligibility.

Based on the experiences of my friends, they had to wait until the rear derailleur got water inside and caused issues before contacting Ltwoo for repairs or part replacements (mainly due to water ingress in the rear derailleur). This process can be frustrating, and this issue may not necessarily occur in every kit. I am inclined to believe it could be a quality control problem. Moreover, purchasing Ltwoo from outside China would incur higher post-purchase costs, both in terms of money and time.

However, there have been some software improvements for the EGR, such as enhanced logic for situations like stationary shifting and accidental button presses. As for hardware improvements, there is currently no information available.

China does have similar forums, but we are not exactly like BBS forums. We are more like Reddit, with channels categorized based on discussion topics, and the discussions tend to be more basic. For more specialized discussions, we usually rely on WeChat group chats, which are more closed-off but allow for deeper conversations.

Yes, I visited the site recently and it disappeared. But the 2024 version of G1005 with downtube storage appeared. I have friends in China, it might be possible to buy the G055 through them if there is only a regional restriction.

It doesn't seem to be a regional restriction issue because I am a Chinese friend myself (laughs). Based on the information I have gathered, they are unlikely to sell the 055D anymore. As for this 1005, it is a modified version based on an old chassis model, as you can see its geometry is identical to their previous works.

I contacted Yishun about this frame. They said that there hasn't been a large OEM order for this frame yet, so production and development is moving slowly. Currently, the earliest date available for ordering is May-June. Maybe earlier only if they get OEM order.

I will order this frame when it is available. Good geometry and I found quite good reviews for the same Cannondale KingPin system.

According to the latest information I have received, it seems that this frame has been acquired by an anonymous brand, who now holds the rights to its molds. Therefore, there is a high possibility that this frame may not be directly released into the consumer market as a retail product by Yishun.

This guy has the exact same geometry as the Carbonda CFR707, with the difference of lacking the largest size and having additional storage box and rear suspension system. The size of the disc brake system has been reduced to 140mm. However, the claimed weight is considerably lighter than the 707.

It is unclear what the relationship is between Yishun and Carbonda. They are likely two unrelated factories, and it is unknown why their geometric designs are completely identical.

Bad news: When I tightened the rear axle on my CFR707 frame, it caused the paint on the contact surface to crack.
I believe this is one of the few drawbacks of the CFR707 frame (at least, it's the issue I've noticed now). Although I didn't use a torque wrench when tightening it, I still think it's a design that needs improvement.

It's puzzling why Carbonda didn't incorporate any design between the rear axle and frame to prevent direct contact with the paint. They could have implemented a countersink (similar to the front fork) or added some sort of paint isolation.

I have uploaded photos of the front and rear axle lock areas. By comparing them, you will understand what I mean.

The challenge I'm facing is deciding between two versions of cranks - DUB Road and DUB Road Wide. I've heard that DUB Wide was specifically designed to accommodate wider tires and address issues like the chain hitting the tire or the spindle contacting the chainstay. So, my question is whether I should opt for the DUB Road or DUB Road Wide version. I've seen some photos of DUB builds here, so perhaps someone can share their opinion on this matter.

Thanks in advance.

I think you should choose the Wide version.