Chinese Carbon MTB Forums
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Re: Another tantan fm699 size small for the kiddo
The heavier tires will certainly help not getting this thing too light. If anything I may switch out the stem for something pretty short like a 40mm. This just gets him on it for now but as he continues we’ll reevaluate. Good input, thanks. August 28, 2021, 07:16:57 AM |
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Re: Stumpjumper clone
The rear triangle is carbon, the flex is because if this - anything you buy from china that is carbon will have a carbon triangle.uh.........no. Aluminum rear triangles also flex. August 29, 2021, 06:44:24 PM |
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Re: The Shiny New AM831 Group Buy (A) Thread!
I thought the same as you but we are wrong, increasing offset actually reduces trail. I accidentally a word there  - lengthens the wheelbase and reduces trail a little and makes it a little less responsive.But yes, I thought that for a while until I saw how it was measured. +/-10mm of trail when you're already over 100mm doesn't feel less stable to me but that is with my anecdotal rider feeling hat on and not as an engineer. If you already have a 51mm fork I don't see a reason not to give it a go. That said, if I don't like how it feels I will replace it with a newer Lyrik or a Zeb in 44mm and will relay my experience. August 31, 2021, 06:22:43 AM |
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Re: The Shiny New AM831 Group Buy (A) Thread!
Concerning rear shock bearings I vote against: the relative movements between parts is of a few degrees and very slow: there is absolutely no need for bearings, bushing is the best solution IMHO. Bearings will be more expensive and prone to failures due to corrosion, mud etc etc. Consider that the shock has a damper, that it's made to dissipate energy through movement in a viscous fluid (oil); some more friction in the bushing is absolutely insignificant. September 08, 2021, 08:25:21 AM |
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Re: FM1001 / FM1156 - 135mm frame
I ordered three frames, one S (for wife, 5’4”), one M (for 14 year old son, 5’5” and growing), one L for me (I’m 6’0”). One of the bikes (the S) is built and ridden on. Son has been riding it for MTB practice and races. He loves it. The M and L will be done being built by end of this week. Here’s a photo of the S. I will respond with my thoughts once I can throw a leg over the L. Frames look sick!! I can also post build components if anyone is interested. Just holler.
September 09, 2021, 12:46:57 PM |
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Bought the Dengfu M08 complete bike - I was in for a surprise.
Rewind to early this year. After being completely fed up with the piece of crap that is my first bike ever - a USD$150 26" Walmart bike, I decided to get something a little bit more pro. I had a mindful budget and headed over to the cycle shop. Well, they politely informed me that there was no chance I was going to get a bike from them until about winter - something about a bike shortage in the US? Hmm, ok... let me find another option. That's when I was introduced to the world of Chinese carbon frames and bikes. Lots of reading and research led me to believe this was probably my best chance of getting a bike this year. I contemplating assembling my own, but figured that would require tools and skills I don't possess, so I opted for a pre assembled route. Again, more research and reading led me to the decision to pick up the Dengfu M08 assembled bike (29er "Standard" level), as shown here: https://www.dengfubike.com/collections/carbon-mountain-bikes/products/m08 I direct your attention to the part that reads Quote The bike is pre-assembled but wheels will be discharged in another carton, totally 2 cartons. Cool, that's fine. First box arrives, the wheels, exciting. I open the box to ensure there is no damage, looks good. Except, wait... there is no brakes, no cassette installed. The hubs are there, and the tires mounted, and I believe tubes inside even, but that's it. Arrive the 2nd box. Again, no damage, but...  Well crap. I expected pre-assembled to mean something else. I suppose the frame is pre-assembled, yeah? Having no idea where to go from here, I start watching youtube videos. SRAM has quite the youtube selection, which is good considering most of the equipment here is SRAM stuff. Basically I binged bike assembly videos for the rest of the night. Confident in my skills, I went about assembling this thing. I got good use out of my torque wrenches and torx and hex sockets. I enjoyed making a tool to press in the SRAM DUB bb, as well as a clever way to press in the tapered headstock. I trimmed my fork with a pipe cutting tool, that worked well. The headstock had a split ring for the tapered fork, and it used an expanding nut for the fork cap instead of a start nut, so no special tools needed for those items. I only had to make one trip to the bike shop - pick up a SRAM front caliper spacer for 180mm rotors - something Dengfu did not include. I also grabbed a cassette wrench adapter, chain breaker, a bike stand, shock pump, tire pump, grease and carbon gripper, and a SRAM brake bleed kit - something that my research told me I'd need if I was shortening my brake cable. I also picked up a new dropper post lever, the one that came with the Zoom dropper seat was of really poor quality. A couple of issues I ran into: I needed to break out the Dremel and grind down the screws that held in the internal cable routing guides - they were too long and rubbed against the fork when it was fully installed. Also, I needed to drill out one of the guides to accept the dropper post cable, the hole was a bit too small. But, never even having worked on a bike before, I managed to fully assemble this selection of parts:  Now, I have to figure out how to tune it, and then see if it falls apart on the first trail I ride. 
September 12, 2021, 09:26:06 AM |
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Re: FM1001 / FM1156 - 135mm frame
There is no paint on the frame unless you order it painted, but epoxi don’t “need” paint. It is only for looks. Eh, more than likely they use a cheaper kind of epoxy that without a UV resistant clear coat at a minimum, will yellow/degrade over time. Most frames will ship either gloss or matte clear over raw but you can ask the vendor. September 18, 2021, 09:05:04 AM |
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Re: Monsuta x Snacks AM831 build
Will be interested how it rides with 27.5 wheels, mainly concerned about the low BB height.
September 20, 2021, 01:47:00 AM |
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Re: The Shiny New AM831 Group Buy (A) Thread!
Snacks - please post a picture from further away.
October 11, 2021, 07:41:00 AM |
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Re: The Shiny New AM831 Group Buy (A) Thread!
Axle to BB, though the angle doesn't change "L", just "X" I will try to go thru a wide range of adjustments and see if I can find a combo that smooths things out. Hopefully will get to it before my daughter's softball game this afternoon. I'm glad others are getting along with it! October 14, 2021, 11:41:11 AM |
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