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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 		3
Re: The Shiny New AM831 Group Buy (A) Thread!
Quote from: Thrill21 on September 19, 2021, 08:30:36 AM
Hey guys, curious to know, how long did it take for your to get a tracking number after paying for your frame?

Thanks,

The questions hasn't unique answer: I bought the frame in June and they told me I have to wait approx 1 month for building the frame; also Haideli found some problems on rear triangle and had some delays in production due to modification. At the end of August they told me the frame was ready and the day after they shipped it and emailed me the tracking number.
I think now the frames are in stock or have quite short production time; the first buyers on this thread waited as long as six months, they bought a dream that now is becoming real.
September 19, 2021, 09:01:23 AM 		1
Re: The Shiny New AM831 Group Buy (A) Thread! Tomorrow the frame is scheduled to be at my door; hopefully no bad surprises. It took 27 days from China and 3 days once it arrived in Belgium.
September 26, 2021, 07:14:06 AM 		2
Re: The Shiny New AM831 Group Buy (A) Thread! The frame has arrived: no shipping damages and it looks really well made; the paint job is better than I expected. Together with it an headset, two rear hangers (one paid extra), the BB, and the rear axle. Moreover a rubber chainstay protector.
First notes:
- I confirm 22.8 and 30.0 for the rear shock mount; I've already installed my dt swiss unit and it is not exactly a 5 minuntes job: you need to undo the rear mechanism and play with washers in tiny space; the M8 0.1mm aliexpress shims helped to make a neat job.
- I bought a shimano BB, the OEM one looks ok, just is much heavier being in alluminium while shimano is mostly plastic; shimano bearings are sticky, OEM are loose and move easily, probably shimano is better; do I need to install the BB spacer oncrank side?
- no interference in seat post insertion, all free of imperfections.
September 28, 2021, 08:51:24 AM 		2
Re: The Shiny New AM831 Group Buy (A) Thread!
Quote from: BSAM on October 11, 2021, 11:46:17 AM
Gentlemen,

Anyone completed the build with the crown spacer to prevent the front fork from hitting the downtube?  I'm quite confused on what we should use;  +0.5° crown spacer?  My fork hit the downtube (Frame Size S).  The rated head tube angle is 65.5° -  This would make 65° with the crown spacer?  I assumed the headset uses 45 degree bearing race. 

https://reverse-components-usa.com/products/reverse-angle-spacer



Most of the forks hit the downtube; a 3 mm can creek with zero change in head angle does the job; remember to change the bearing too to one with 36/45 degrees
October 12, 2021, 03:46:05 PM 		1
Re: The Shiny New AM831 Group Buy (A) Thread! Bike finished; lighter than expected at 12.3 Kg, where the tyres alone are 2 Kg! I will make a build thread later on if I will have time, for now main components list:
Fork manitou mezzer, rear shock DT swiss 531, rims carbonality carbon asymmetric with dt swiss hubs, tyres maxis DHF ant  + rekon post, saddle,post,pedals aliexpress, handlebar OG evkin, groupset and brakes shimano XT.
Test drive:  I climbed steep asphalt road (average 18%) and the position is ok, no front wheel lifting despite the 4 cm spacers under stem, also I appreciated the lock on rear shock and the mezzer with all dials at maximun is stable too; the bike isn't very fast on flat road, it's hard to mantain 30 km/h, probably due to the draggy tyres, but uphill doesn't feel worse than my 9 Kg XC bike; downhill as expected is a all trails  eater, very fast on flow sections, I really enjoyed the ride; of course it needs more suspension tuning.
October 15, 2021, 07:57:26 AM 		2
Re: The Shiny New AM831 Group Buy (A) Thread! Alert for all users:
 I've found the shock conneting rod with 8 mm allen key loose after first 20 km test ride...I made it tight adding more thread lock compound; definetely these bolts need some attention
October 16, 2021, 07:32:36 PM 		2
Re: The Shiny New AM831 Group Buy (A) Thread!
Quote from: FlaMtnBkr on October 21, 2021, 12:57:19 AM
How many people have had a chance to ride the bike yet? Thoughts?
Anyways, I hope others are liking theirs and I get more excited once I can start rippin around some trails
This is my second chiner, the first one was an XC carbon frame 9 Kg, still working after 9 years abuse; in that case the build was very easy.
With this bike the build was challenging, many issues (frame hitting the fork,chainline,internal cable routing, rear shock bolts) but at the end the bike is real; I spent more than what I planned, due also to parts shortage covid related: no special sales, if you find the part you want you pay full price.
I ended up with approx 3000 $ bill,(roughly 800$ frame, 700$ wheels, 900 $ suspensions, 600$ the rest) that it is above my initial plan.
I wanted a bike that is good downhill but not too heavy uphill, and for now I am really happy.
First rides impressions: (consider that there is still a lot of fine tuning to do)
At 12.3 Kg it is probably one of the lighest full suspension 160-150 mm excursion bike in the market: even 10,000 $ bikes sometimes are heavier; it climbs really well, the DT swiss F535 shock is perfect with three position lever (open, climb, full lock) giving a stable pedaling platform; this aliexpress saddle is very light and it's the most confortable I've ever tried:
https://www.aliexpress.com/item/32766321631.html?spm=a2g0s.9042311.0.0.27424c4dc99TC2
These pedals are also light, cheap and well made:
https://www.aliexpress.com/item/1005001829797106.html?spm=a2g0s.9042311.0.0.27424c4dc99TC2
I don't feel the bike worse uphill than my 9 Kg XC bike, except maybe for the tyres drag (minion DHF+rekon).
Downhill performance:
The bike is good, I like the position and being extremely big it eats the trails and the bumps; despite this there is still a lot to do in tuning: the fork manitou mezzer has two hair chambers and two hidraulyc dials, now it's decent but not perfect.
I think the 740 mm wide handlebar has to be reduced to 700 or 720 mm (I am 176  cm tall); the position of the saddle relatively to the post also is not perfect.
The only way to have a good setup in my opinion is to go in a bike park, dial in the suspension and repeat the easiest trail a couple of times, I don't think I will have a chance to do this before next spring.
Shimano XT brakes are powerful enough on 180 mm discs and no drags at all; I wanted formula cura as first choice but are sold out around the world.
To maximize the fun you have to trust the bike and on flow section increase the speed above your confort zone...and it pays back, it literally flies over obstacles.
Mistakes during build:
The shimano chainring with 52 mm chainline it's too close to the frame: better to use an aftermarket chainring that has no bolts and then more clearance; I don't recommend the 55 mm chainline.
I Bought a 34 chainring, and while to me 34/51 is enough uphill, 34/10 is almost useless on this bike: a 32 teeths chainring is more than enough in my opinion.
Problems so far:
Rear brake hose rattles inside frame, probably not too difficult to fix; shifting up is good but not great, I have to study the hanger b screw position as per previous posts; for some evil reason my rear rim is true but the maxxis rekon tyre can't sit completely straight. (maybe defective  tyre?)
After first ride one big bolt of rear suspension connecting rod got loose and the rear triangle become laterally flexy: I made up all four at the specified torque, added new thread locker and marked the bolts with paint to check movements: so far it's ok; with the bolts made up and the rear wheel installed it's not flexy, unless you push really hard.
And of course with such a new and nice bike I am not only afraid of hurting myself with a crash but also of damaging the bike itself  ;D ;D ;D
Last problem...the bike it's huge and doesn't fit my car trunk as other bikes did >:(
October 21, 2021, 01:22:25 PM 		3
Re: The Shiny New AM831 Group Buy (A) Thread! Eddy, can you tell us which checks and eventual retrofit we can do to existing frames to correct (potential) flex problem?Are spare bolts available for purchase?
October 29, 2021, 07:13:20 AM 		4
Re: The Shiny New AM831 Group Buy (A) Thread! I haven't tried pedaling 165 mm, I don't know how much worse is uphille and better dowhill in avoiding strikes: bb height of 831 is 344 mm, so means 159 mm clearance with 175 mm cranks and 10 mm sag; using 165 mm cranks will increase it to 169 mm, that is just 7% higher / better.
In my opinion working on suspension sag and hydraulics is the first move to limit dive and then the risk of strikes, but the low BB is part of the so called modern geometry, giving low center of gravity and then of course more stability; I admit I was tempted by 170 mm cranks  (santa cruz hightower uses 170 mm), but I never considered 165 mm.
Just a note: the frame is new and we are like beta testers, but the communication with Haideli (Eddy & Joy) so far is excellent, so this is for sure an added value in the choice of buying one frame rather than the other; a lot of aliexpress or chinese companies are just resellers and don't have any technical support.
November 01, 2021, 02:12:17 AM 		1