New frame: Longteng RD301-D

[acino]

Thanks for your reply.

Magene website says that T47 is not compatible with their crankset. Have you actually installed one ? Do you have pictures of your build ?
thanks,

I have been trying to understand this in the recent days and the way I understand it is external T47 is fine, internal T47 depends on a frame and is a gamble.

[Alexander]

I’ve ordered this frame and am building it up with wheels from Peter here.

Any recommendations on cranks and chain rings? Trying to keep the weight down while also keeping the budget  I am running Shimano 105 11-speed shifters, derailleurs, and brakes. I also picked up a lightweight cassette from Ztto.

Edit: I don’t know if it matters but I’m quite light 70kg/155lbs but can do a 1100w sprint.

[violino21]

How are your builds guys? Any new observations? That picture od the inside of bb area got me concerned... Did anybody got hold of the TanTan (Seraph) variety? How is the storage compartment cover? This is one of the highlights of the frame, making it na alternative to Trek Domane, Argon 18 Krypton, BMC Roadmachine or even Enve Fray.

[kwantani]

I can only commenting the storage compartment cover in my case...

Per the advise from LT, I use sandpaper to grind off the excessive paint around the edge of the cover. This seems to stop the cover from "falling off" the frame. I then repeats the fully filled water bottle test again and so far the cover managed to stayed (no detached from frame) when repeatedly taking out/putting back the water bottle. However I still need to test it under real riding conditions. I still have a velcro strapped around the cover as a insurance until I'm confident it would not fell off during ride. I'm just feel traumatized by the thoughts of the whole water bottle + cover detached from the downtube at the middle of the ride, causing a crash! 

How are your builds guys? Any new observations? That picture od the inside of bb area got me concerned... Did anybody got hold of the TanTan (Seraph) variety? How is the storage compartment cover? This is one of the highlights of the frame, making it na alternative to Trek Domane, Argon 18 Krypton, BMC Roadmachine or even Enve Fray.

[Ahodesu05]

I mentioned that my rear wheel has a bit of wobble and I couldn't figure out why. Attached is a video of the wobble. After pinging both Elitewheels and Longteng, each had different responses:

1. Elitewheels says it might be an issue in their rear hub assembly and sent me a set of new bearings.

2. Longteng says it might a case of the rear through axle being slightly too long. They suggested adding a spacer/washer to the rear drop out per the attached instructions.

I'm hoping to tap into this forum's expertise here: which is likelier to be the root cause? If it's the rear hub, then Longteng gets a pass (and I'll take the rear wheel to the LBS to get this sorted). If it's the rear through axle, then it's disappointing that a frame manufacturer got this wrong (and I'll either add the washer/spacer or maybe upgrade my through axles).

Thanks in advance.

[bichler.bua]

I mentioned that my rear wheel has a bit of wobble and I couldn't figure out why. Attached is a video of the wobble. After pinging both Elitewheels and Longteng, each had different responses:

1. Elitewheels says it might be an issue in their rear hub assembly and sent me a set of new bearings.

2. Longteng says it might a case of the rear through axle being slightly too long. They suggested adding a spacer/washer to the rear drop out per the attached instructions.

I'm hoping to tap into this forum's expertise here: which is likelier to be the root cause? If it's the rear hub, then Longteng gets a pass (and I'll take the rear wheel to the LBS to get this sorted). If it's the rear through axle, then it's disappointing that a frame manufacturer got this wrong (and I'll either add the washer/spacer or maybe upgrade my through axles).

Thanks in advance.

Looks like the axle does not thread in enough, guessing the spacer would solve it.
But you can find out yourself easily, what happens if you insert another set of wheels?
Any bearing play in the wheelset (maybe test on another bike)?

[kwantani]

Latest decoration on my LT

from the 2nd pic you can see I used the plumbing tape to tape the downtube cover to the frame, as an insurance until I feel confident the cover would stayed locked and won't fell off.

[Ahodesu05]

Looks like the axle does not thread in enough, guessing the spacer would solve it.
But you can find out yourself easily, what happens if you insert another set of wheels?
Any bearing play in the wheelset (maybe test on another bike)?

I only have this bike and wheelset  

I do plan to try the washer. I’ve read elsewhere that others have the same problem, hope this solves it.

[Alexander]

How are your builds guys? Any new observations? That picture od the inside of bb area got me concerned... Did anybody got hold of the TanTan (Seraph) variety? How is the storage compartment cover? This is one of the highlights of the frame, making it na alternative to Trek Domane, Argon 18 Krypton, BMC Roadmachine or even Enve Fray.

I have ordered from Tantan but have not received the frame yet.

[maza]

I only have this bike and wheelset  

I do plan to try the washer. I’ve read elsewhere that others have the same problem, hope this solves it.

Can you try this?

1) Take photo from the drive side of the frame. Measure how far the through axle is from being flush to the nut / how far in the TA is.
2) Repeat without wheel but thread the axle all the way in. If there is no difference you can be sure the through axle is just wrong size.

In any case you could measure the through axle dimensions. Length from the base to the end. And length of threaded area.

[kwantani]

regarding the rear wheel play on my case... as soon as I seat on the bike, the play is gone from the rear wheel.

[violino21]

I have ordered from Tantan but have not received the frame yet.

Super. Let us know when it arrives if I may ask.

[maza]

regarding the rear wheel play on my case... as soon as I seat on the bike, the play is gone from the rear wheel.

That is not possible. You're just not able to feel the play anymore as to move the wheel you would need to a create force greater than your body weight in the opposing direction. Uneven wear and potential to damage remains.

[kwantani]

Ahodesu05,
     I think the #2 response is the correct diagnosis. Checkout my video here, that explained it right there. If it's the hub issue, you SHOULD not see the wobble play like this. Very obvious it's the TA and rear dropout mismatched length.
    Now where do I get the 2mm spacer?

I mentioned that my rear wheel has a bit of wobble and I couldn't figure out why. Attached is a video of the wobble. After pinging both Elitewheels and Longteng, each had different responses:

1. Elitewheels says it might be an issue in their rear hub assembly and sent me a set of new bearings.

2. Longteng says it might a case of the rear through axle being slightly too long. They suggested adding a spacer/washer to the rear drop out per the attached instructions.

I'm hoping to tap into this forum's expertise here: which is likelier to be the root cause? If it's the rear hub, then Longteng gets a pass (and I'll take the rear wheel to the LBS to get this sorted). If it's the rear through axle, then it's disappointing that a frame manufacturer got this wrong (and I'll either add the washer/spacer or maybe upgrade my through axles).

Thanks in advance.

[Ahodesu05]

Can you try this?

1) Take photo from the drive side of the frame. Measure how far the through axle is from being flush to the nut / how far in the TA is.
2) Repeat without wheel but thread the axle all the way in. If there is no difference you can be sure the through axle is just wrong size.

In any case you could measure the through axle dimensions. Length from the base to the end. And length of threaded area.

Thanks for this. I did some measurements:

1. When fully tightened to 10NM with the wheel on, the through axle is not flush to the end of the nut/cap on the drive side. It's about 6mm short of flush. When I removed the wheel and inserted the through axle, it's around the same 6mm short of flush.

2. I took measurements of the through axle and the rear drop out area.

Does this help to diagnose the problem?