Chinese Carbon MTB Forums
News:
Happy Holidays!
See likes
See likes given/taken
| Post info | No. of Likes |
|---|---|
|
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
When you compress this headset, the space no longer exists. I saw these comments and so I bought another set of spacer on Ali. By simply putting it down, there was no gap. Also, when I compressed the headset, the handlebars wouldn't turn anymore because they were too tight. So I came back with the initial headset which is well tuned. I'll be posting pictures soon. I'm currently testing the bike
May 08, 2024, 12:39:15 AM |
1 |
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Looks very nice Thank you. The complete process of ordering with specifying paint, parts, and building has been a no issue (and pleasant) adventure so far. Some really minor things are; Tracking of the frame, a notice of a booked parcel and then nothing for 20days, and the last 1-2 days were packed with updates. Not a product quality issue. Next minor notice, and im being quite picky now, is that the rear axle threads in place somewhat with resistance. Hunch is that derallieur hanger and axle thread tolerances are not the same as the carbon parts. To be honest, those are just small farts in a storm as comparison. Did a initial 60min ride and pushed it a bit. Im about 82-84kgs, Pmax of 1300w roughly on a super light frame, size 56 and my reaction is undisputed happiness. Frame feels stiff and as per geometry of frame, right on target. For a safety check of handlebar + stem check, I hanged my whole body wheight on the drops and jumped/rocked up and down. Solid as can be. To summorize so far, _really_ satisfied. May 08, 2024, 01:45:27 PM |
1 |
|
Re: Yuanan Carbon fiber wheelsets Year end discount promotion
Thank you very much for your enthusiastic and practical suggestions. I will study your suggestions and provide feedback to our factory. Let’s look forward to the new lighter, wider inside and outside, dual ratcheting system, and deeper mixed-depth road/gravel carbon wheelset.
May 11, 2024, 04:16:24 AM |
1 |
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Nice catch! Didn't notice that. I wonder how other brands do it. Still wondering though if I should go 110 instead of the 100mmI hadn't been careful when I took the HBR13 in 100mm. As a result, I bought a 0° seatpost. I then moved my shoe cleats back slightly because of discomfort under the underfoot. Everything looks ok now. The worst is that I had ordered two seatposts in -20 (in case of breakage). For longer saddles, it could be okay but it's limited to the level of the marks on the rails. Otherwise the handlebars are great. May 12, 2024, 04:56:09 PM |
1 |
|
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
HBR13 in 100mm
May 13, 2024, 05:32:43 AM |
1 |
|
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Took me a bit longer to make this post. Overall experience has been really good. The fit of everything was spot on. Full build came in at 15.2 lbs without pedals (size 52). For being that light, I am also surprised at how stiff it feels in accelerations. My order was handled well and had great communication. I really like the color but it is more purple than I expected, but it looks great. You can see in the sunlight it has the orangish chameleon, but the purple is the dominant color. Paint selection was LCB-02HS. Current setup is gp5000 28mm, but have a second wheelset with 32mm gp5000. One bummer is the width of handlebar options. I went with the 40 x 110 handlebar and I have been running narrower bars and would have selected narrower, if available. I will quickly address some of the items on this thread: My frame has a drain hole under the BB I will say that the layup feels pretty thin below the bottle cage on the downtube. It is a larger tube size, but the wall thickness feels thin. Brake caliper mounts are faced Rear thru axle does require more torque than other frames (but doesn't appear to be any thread damage, so I don't know, not really an issue to me, but a previous poster described this). I had to cut the seat tube to get my fit right, but just 1/2" or so. I also ran into an issue with the seatpost clamp. After riding I needed to adjust, and upon retorque the clamp to 6nm something with the pins that hold the bolt broke. I have contacted LC and will update with how quickly they respond. I am pretty sure their clamp is a tried and true design across other frames, so I am not quite sure. I want to tear it apart to see whats going on but it is kind of a captive part. May 13, 2024, 09:24:21 AM |
1 |
|
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
Little update, received pictures of the paint job of my frame. Sadly it apparently will take another 30 days until it arrives. But im happy how it turned out. Bought a gold KMC chain and brown leather bartape to go with it. Now i need to find a brown sadle to match it.
May 14, 2024, 02:38:00 AM |
1 |
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
I agree with you with the aesthetics of the downtube. It would look better and make more sense in a different (teardrop like) shape. You do you! i considered buying one myself for many weeks, and i'm not saying it's a bad frame, in fact i think it's a great frame! i was just detailing my thought process as i figured it could be useful to some. Enjoy your new bike and post here about your experience and impressions! May 15, 2024, 08:41:07 AM |
1 |
Deerobust/Goldix wheel build 50/55mm 1319g
I wanted to share with you all the results of my first wheelbuild. The headline specs/stats are:
I've been meaning to make this thread for a while. I've been busy finishing my PhD and finally had the time to cobble it together. Theres some more build info I want to add in a later post but I'll put this up for now. I had recently bought myself a truing stand and tensionmeter to rebuild a wheel with a rim that I broke racing CX. Now having the tools to build wheels, I got curious about the phenomenally low prices on wheelbuilding components, as well as the freedom to pursue interesting build configurations. I'll be transparent here: this is a vanity build driven by questionable weight and aero-weenie-ing. Experienced wheelbuilders will probably cringe at my choices, and that's fine with me. The irony of scraping for grams on this build while I could stand to lose 20lbs of body fat is not lost on me. At the end of the day I had a lot of fun building these up, I think they look super cool, it's exciting to me that I've built up such a lightweight wheelset, and I've had a pretty good experience riding them so far. Given this premise of vanity over practicality, I hope you can appreciate my wheelbuild for what it is. Rims: I did a bit of searching for the manufacturer of the lightest rims and landed on Deerobust. It helps that they are the first result when you search "lightest carbon rim" into aliex. This is no exaggeration, the 21mm-internal-width, 50 and 55mm-deep rims I chose ("featherweight"-spec + paintless finish) were quoted at 390g and 420g respectively; the only manufacturer that seems to come close is Lightcarbon. I chose 50/55 simply because it's a depth that seemed to strike a good balance between weight and aero. I also won't lie and say that the decision was influenced by the fact that the Enve SES 4.5 rims used by Pogi and UAE are 50/55mm deep, even though if we're being realistic those are completely different wheels. I chose 21mm internal width because it seems that this is still the ideal rim width for aero given a 28mm tire. I understand the rule of 105% says otherwise. On the other hand, Peak-torque's testing results (particularly the comparison of the Polaris Ascent 42 against the ICAN Aero 35 across 28mm and 32mm tires) suggests that a 28mm tire is faster on a 21mm internal width rim compared a wider one. Another feature I chose for my rims is internally-drilled spoke holes. For one, there is the (dubious) aero benefit of having hidden nipples. But more importantly--as ENVE's marketing material points out--smaller spoke holes means stronger spoke holes, and therefore a stronger, safer rim. I paid $507 (inc. shipping) to order my rims from Deerobust, with bespoke paintless finish, hole-drilling, and logo. The rims weighed 410 and 415g respectively. I was a tad disappointed that my front rim came 5g over the spec weight +/- 15g margin of error. On the other hand, my rear rim came 5g under spec weight, the average weight between the two was under the +/- 15g per rim margin of error, so I called it good and decided to not complain. Hubs As for hubs, I chose GOLDIX 21-spoke hubs with 2:1 lacing. These have no official model number but appear to be a DT-swiss style ratchet hub with straight-pull lacing. I chose these because a) Goldix seems to have a fairly decent reputation on here, and b) these hubs are very lightweight. The standout unique design feature of these hubs is that there are 21 spokes, 14 spokes laced in a 3x pattern on the stressed side (drive side on rear, brake side on front), and 7 radially-laced spokes on the non-drive side. I went for this unusual design because fewer spokes theoretically means lighter and more aero, while the 2:1 3x lacing, especially when paired to such deep rims, potentially could make up for the loss in stiffness. Remember, this is a vanity build. When my hubs arrived, they seemed to be of decent quality. The bearings were a tad notchy--something that has gone away since I started riding them. The bearings are "NBK" brand, and have metal ball cages, which are a feature of decent-quality bearings. These aren't showstoppers, but they aren't complete garbage either. One criticism I have about these hubs is that that to achieve radial lacing on the non-stressed side, the hub axle has a hole drilled out to allow a spoke to be passed through into the back of the spoke hole. This means that the wheel bearing on the radially laced side is offset inboards an entire centimeter. This is bad for hub stiffness and longevity. The further inboards the bearing sits, the longer the unsupported section of the axle is (making less stiff), and the bearing has to bear more axial/side loading (which harms longevity). In the future I might swap these hubs out for a different design. Spokes and nipples For this build I chose Pillar Wing 20 with Pillar hex-10 internal nipples. I have a whole extra story to tell about these nipples that I will get to another time. I chose these spokes over the alternative (Sapim CX Ray/DT aerolite) because they are supposedly stiffer, lighter, just as aero, and definitely are cheaper. The idea that a wider spoke section is just as aero as a narrower one baffles me, but I'll trust in Campagnolo and Boyd, who have supposedly tested this difference and chose the Pillar wings. I also spoke-prepped my threads using Rock n Roll Nipple cream. Finishing touches As is common, I have wrapped my wheels in 28mm Continental GP5000 clincher tires, with RideNow 19gr tubes inside, likely the lightest and lowest-rolling-resistance combo in the Continental range, barring the GP5000TT. I'm also running ONIRII's super-light 160mm floating disc rotors, and an S-ROAD one-piece 11-32 cassette Overall impressions So far I've logged about 100 miles on these new wheels on my road bike. They certainly sound cool and feel fast. And they do not feel like they're particularly lacking in stiffness. One major complaint I am experiencing is that my freehub ratchet has been slipping occasionally. I serviced it and found that I had reinstalled the o-ring incorrectly and that some dirt/grime had made its way into the ratchet. After a bit of cleaning and regreaseing it was nearly perfect once again, perhaps I need to clean it more and regrease with the special DT swiss ratchet grease. Are these truly "fast" wheels? Who knows. They haven't stopped me from setting a bunch of Strava PRs here and there. But as far as bling factor, these are 10/10, super cool and super fun wheels to have. Thanks for reading my wheelbuild story. Would love to hear your thoughts and questions. Hopefully soon, I can make a quick post about how I dealt with some challenges I experienced using the Hex-10 nipples. May 15, 2024, 03:30:12 PM |
1 |
Re: Lightcarbon: New LCR017-D (or Yishun R1058-D)
For me that's actually what is more valuable in these forums. Analysing the different reasoning and mental model different people use to select frames/bikes/products. Question them and take my conclusions and decisions. It's the same for me. From others experiences and opinions I can maybe learn or think from an different angle on the topic. So I thing discussions are a good thing 
May 16, 2024, 12:50:40 PM |
1 |
