New frame: Longteng RD301-D

[Ahodesu05]

Here is a bike geometry question that I hope someone could help me with.  I'm trying to figure out the stem length of the integrated handlebar that I'm going to order from Aliexpress.  Since it's a one piece and I'll be doing all internal cabling, I need to try to get it right without going through the pain of redoing half the build!

My current bike is an older Scott CR1 with a 100mm stem.  Comparing it to the 301:

- Both have similar reach
- Both have set back seat post
- The 301 has a shorter effective top tube by 110mm but also lower stack by 150mm

If I use a 100mm integrated handlebar on the new 301 build, will that get me to roughly the similar place as my current bike position (assuming that 301's shorter effective top tube will compensate for its lower stack)?

Thx in advance.

[Serge_K]

Well logically, assuming the 100mm measurement is consistent (there's the question of whether 100mm in cockpit stem length is the same as 100mm in standalone stem length), assuming the stem angle is consistent (not all cockpits have the same stem angle, and your Scott stem has a stem angle), assuming both bars are about the same geometry (not all bars / cockpits have the same reach, drops...), then if you pick a 100mm cockpit, your position should mirror the new frame (stack & reach) geometry, so you should be lower (15mm) and closer (11mm) - btw 110mm is 11cm, i assume you mean 11 & 15, not 110 & 150. The stack is easy to adjust with spacers. The top tube of the 301 being shorter, in principle, you should get a 110mm cockpit.

[Ahodesu05]

Another interesting comp is the Aethos.  Geometry-wise at least, this frame does seem to sit alongside other all arounders.  Looking forward to getting this thing built up and out on the road!

[Serge_K]

Interesting, very similar indeed!

Looking fwd to seeing your build. I'm just back from a ride this AM on my long teng 268, we did 110+km @34.5kmh avg. I love this bike

[Tsunami]

Any new builds out already?

Is there a picture on the storage frame?
Couldnt find any.

[Ahodesu05]

Any new builds out already?

Is there a picture on the storage frame?
Couldnt find any.

I placed an order for the frame but won't take delivery until August (due to my travel schedule) - will share more info/pics when I do get it and build up the bike.

Here's a pic of the frame with the internal storage.  (They don't provide any sort of soft pouch that fits the storage.)

[Ahodesu05]

Anthony Turgis of Total Energies just won the gravel stage of the Tour de France on the Enve Melee, very similar in geometry to this bike frame

[PLA]

similar geo as in they both fit kinda wide tyres

[kwantani]

I'm ready to pull the trigger for LT R301D...
size 52, 2 colors paint job (white/red) with "龍腾" logo/decals. Paint job coast $100 extra.
With handlebar/TA/HS/Der-hanger/freight/Paypal fees all come out total of 845usd shipped to door.

[Serge_K]

I'm ready to pull the trigger for LT R301D...
size 52, 2 colors paint job (white/red) with "龍腾" logo/decals. Paint job coast $100 extra.
With handlebar/TA/HS/Der-hanger/freight/Paypal fees all come out total of 845usd shipped to door.

sweet, looking fwd to seeing your build! i've bought 2 frames from them, i paid by swift transfer. i'd say, save yourself the paypal fees. paypal has become a sad farce. revolut for the win.

[kwantani]

rough sketch....

[jb3112]

New forum member here, and starting a new thread after posting about this in a thread on the LightCarbon LCR017-D (https://chinertown.com/index.php/topic,4309.255.html).

Long story short: I snuck in to the Taipei Bike Show today to check out some Longteng and LightCarbon frames, and at the Longteng booth, I found out that they have an unreleased frame which is undergoing testing: the RD301-D.  Here is a short video that I took, and a few pages from their brochure with its geometry: https://imgur.com/a/XvH327j.

Appearance wise, the 301 doesn't break any new ground, but a few things stand out:
- It has an aero profile but is under 1000g weight
- The geometry (especially stack) sort of sits between an upright endurance bike and bikes like the Velobuild 177 and 268, Winspace SLC 2.0 and 1500, Yoeleo R11 - this geometry is a sweet spot for me [edit: the geometry seems comparable to the touted all-arounder Trigon AR01]
- Whoa, max tire clearance of 38!
- Cool little storage space on the downtube
- Threaded T47 BB
- Per their rep Alisa, it's made with a mix of T800 and T1000 carbon

This frame hasn't been posted on their website, and Alisa said it will be released "in a few months" once testing is complete.  The 54cm has passed their tests and is available if anyone is interested - you can email Alisa at longtengalisa@163.com.

Peace out!

[Edited to add reference to the Trigon AR01]

Is longteng and lightcarbon same frame ?

[Serge_K]

Is longteng and lightcarbon same frame ?

not at all. Long teng is a different factory that OEMs for Argon 18. Light Carbon OEMs for various known brands, it's on their website. Or WAS on their website? i think they changed the https://www.lightcarbon.com/about-lc_d1 page recently, they used to list brands they OEMed for before. From memory at least.
i think it's fair to say i've been the loudest advocate for LT on this forum in 2024 because i'm extremely happy with the 2 LT268 i've built and ridden.
LT is / was a bit cheaper than LC.
Havent ridden a LC, so can't say if one is better than the other. but the 268 is for sure an open mould. 

[kwantani]

RD301D  is coming along nicely, just finished painting. Should be shipped out next week.

[Ahodesu05]

Mine will be shipping shortly as well!