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Messages - FlaMtnBkr

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1
29er / Re: Looking for a frame for 5' tall daughter
« on: February 20, 2026, 06:43:29 PM »
Thanks for the suggestion. I'll try looking into used stuff, just figured there isn't much in the XS/S range, new or used. Her mom is 5'3" and I think she has a M specialized frame that's fairly old with 26" wheels, which was an attempt to get her to ride with me a long time ago but never really caught on.

I wonder what height 29" wheels would start to work ok? If a frame is designed for them I would think strength would matter more than height if there is adequate standover? I actually have a really nice set of Chris King wheels that I built right before I got really sick, but they are for rim brakes and not disc. Probably not easy to find a mtb frame with brake bosses these days.

I guess I'll have to do some more research since I'll also have to find a decent front fork that will work.

Thanks and any more suggestions would be great!

2
29er / Looking for a frame for 5' tall daughter
« on: February 19, 2026, 06:06:30 PM »
My 11 yo daughter is finally starting to get tall enough to get a real MTB so I've been looking around at the various carbon HT frames and hoping to get some suggestions.

She is 60" and has a 24 1/4" inseam while barefoot so I figure with shoes right around 25". She is also growing like a weed and on track to be 5' 8" when done growing. I'm thinking a 13.5" frame will fit her OK now and should last a year or 2 before she outgrows it?

Since 27.5" wheels are becoming less and less popular I'm not sure if I should go with them and hopefully find a good deal on something decent? Or if 29" is at all feasible at this point? We're in Florida so trails tend to be fairly flat and groomed unless you're looking for rocky and rooty.

She plays softball and is in pretty good shape and usually fairly fearless and I think she will like it. I got her a pretty nice aluminum kids bike with 7 gears in the back when she was 5, that she learned to ride in about an hour (which was a lot quicker than I did from what I remember), and can still get around on it but is far too big for it. I guess I'm just wondering if anyone has gone thru something similar and has any suggestions? I'm hoping to move parts over when it's time to size up so would like to be able to move over as much as possible and I also have a pretty big parts bin that can be used if they will fit.

Or maybe I should wait a bit longer and let her grow some more? Anyways, any thoughts or suggestions are greatly appreciated! Brand suggestions for a 13.5" HT that tend to be well made would also be great.

PS if there is a better forum for this feel free to move it

3
29er / Re: Carbon defect - serious or not.
« on: January 26, 2022, 02:38:46 PM »
It's hard to say and more pics would have helped. Looks to me like the carbon didn't get pushed tight up against the mold and the empty space filled in with (tinted?) resin and the carbon is likely 1 or 2 mm down.

Is that the seat tube? Carbon is extremely strong and stronger than it needs to be in most places. I'd bet it's perfectly fine even if a layer of carbon were removed (though the other layers should be right behind it). You documented it with the company if something were to happen and from what I've read I'd expect Carbonda to take care of any problem.

4
29er / Re: FM1002 / FM1166 - 150mm frame
« on: January 26, 2022, 02:24:52 PM »
Massey:

Did you happen to weigh your XL frame? And out of curiosity, how tall are you? I'm 6'2" (187 cm) with 33.5" (85 cm) inseam and thinking the XL is correct but not sure. Tried asking Carbonda and they have no sizing suggestions other than test riding a bike which seemed strange...

5
29er / Re: FS830 Enduro Frame - Stef Biggel’s build
« on: January 23, 2022, 01:08:49 PM »
Maybe try taking a hot air blow dryer and heat up the frame stickers and see if that will let you squeeze the air bubbles out and stretch around any curves so it lays flatter. You can also take a needle and poke a small hole in any bubbles you can't get rid of so you can squeeze out any air.

Good luck!

6
29er / Re: The Shiny New AM831 Group Buy (A) Thread!
« on: January 03, 2022, 10:10:13 PM »
The holes on mine were fairly over sized and I was able to take an inch or so of black tubing and put a split lengthwise. Then slid it over the cable and pushed it into the hole, slice down. I think it was black aquarium air line tubing, but can find out the size if anyone wants. Can also probably take an old intertube and cut a piece and wrap around until it's the right size and push it all in. But will probably have to unhook the back end so you can pull about a half inch forward and push the entire wrapped section backwards.

Or get something like Sugru or even a blob of silicone caulk...

7
If you paid PayPal with a credit card, most offer buyer protection just for these types of situations, and usually don't have strict deadlines. Might be worth looking into for those that used one.


8
29er / Re: TopFire FM-M940
« on: December 24, 2021, 01:21:04 PM »
Looks like an Ican frame? If so, should be plenty of feedback out there. Travel range is probably with different stroke shocks...

9
29er / Re: Sons new Carbonda fm909.
« on: December 24, 2021, 01:10:22 PM »
How old is he? Bet he is excited if he likes bikes. How do you like the wireless shifting?

10
29er / Re: The Shiny New AM831 Group Buy (A) Thread!
« on: December 14, 2021, 12:36:31 PM »
There are better designs but I wouldn't consider it a flaw.  I ended up tapping the upper link and the bolts tighten without washers, that is a QA problem.  Do they stay tight? Yes.  Do I like that the carbon is a bushing? No.  I still ride it 2-3x per week as-is, excessive flex and all. 

Yours is, this is most likely a QA issue again.  Mine shifts super smooth but I also checked it while building and have had to straighten it twice.  I ordered a few extra with the frame and you can grab them from Ali, I wouldn't write it off until you replace it or straightened it if you haven't already.  I know, it is money you shouldn't have to spend and you can try to push Eddy to send you a new one.

I paid for the new triangle, I'll be the guinea pig.  If it makes the frame great then it is still a bargain at 1/3 the cost of a Hightower CC.  If not, I (we) gambled and lost.

I guess it depends on your definition of a flaw. Does bad design that introduces flex and frame wear sound better? From an engineering standpoint, it is a flawed design. I don't think you will find many other bikes where the frame and fastener is forced to act as a bearing/bushing as opposed to the actual bearing next to it. And that's just the one pivot.

I have made sure my hanger is straight and replaced it with one of 3 spares I ordered. But they are all the same so I didn't expect much and it did nothing to help. I provided the drawing from Sram and anyone is free to measure theirs to see if it's within spec, but it's not. Looking at the drawing, these hangers have a x=15 and an L=27mm. When 1mm of B screw adjustment can have a large impact on shifting performance, thats a big difference from what the hanger should be. And as Sram states at the bottom of the pic, anything outside of those dimensions can effect shifting performance. If others are OK with it out of spec that's their choice, but it shouldn't be. And a QA issue would be tenths or hundredths of a mm, so the hanger just has the wrong dimensions.

I thought I was buying a working frame and didn't see anything about gambling. It also took more than a year longer for it to be ready and I think most of us assumed they were sorting out these kinds of details. But I guess we all have different expectations when buying something. But could you imagine Santa Cruz releasing this frame to the public?

11
29er / Re: The Shiny New AM831 Group Buy (A) Thread!
« on: December 14, 2021, 02:44:29 AM »
I'm trying to stay positive but that's pretty hard at this point.

Has anyone asked about a refund? Just about ready to walk away from all this...

12
29er / Re: The Shiny New AM831 Group Buy (A) Thread!
« on: December 14, 2021, 02:20:00 AM »
Sorry if this sounds ignorant but the new rear triangle has 1 bearing pressed from the inside and one pressed from the outside no ? So its similar like jjj fix for the frame right . Wont that fix the issue

I was trying to reply to a post but managed to not get it quoted. He was suggesting that they had made changes to the layup of the carbon to make it stiffer, before this new triangle was designed. I was just trying to say that even if it was stiffer, if nothing was done like the double bearings, there would still be a design flaw. It wasn't about the new triangle. Sorry if that was confusing and I'll try to edit in the missing quote.

 

13
29er / Re: The Shiny New AM831 Group Buy (A) Thread!
« on: December 13, 2021, 11:43:07 PM »

Maybe they did fix the QA issue on the upper link and triangle connection.  Also possible that they made layup adjustments on the "standard" triangle for small improvements.

This new rear triangle may just be an upgrade for the hard charging and/or 200lb/90kg+ riders where the standard triangle can't manage the lateral forces.

I don't know, I'm not trying to justify it because most of you know I have one the flexes beyond what I think is optimal.  Are we the vocal minority?

Yes, people getting frames right now don't have the beefier design but does it move around like it is barely attached?  If you have a wheel and seatpost to throw on and to test that would be interesting to see.

Email says in production and finished in mid January, to me that says starting in April and maybe shipped by June.  Add another month for paint.  I'd like to be wrong on the timeline and get one before spring.



If the bearings are still pressed in from the inside with no way to retain them,, and there are 2 bolts, one on each side, then there is still a design flaw even if lateral flex is reduced.

It doesn't seem like as many people are having shifting problems, but the derailleur hanger is built outside of Sram's 12 speed design specs. For some it may shift ok now, but I have to think it could be better if within specs. And what will happen once things start to wear? I don't know, but I do know mine doesn't shift worth a....hoot, and no combination of adjustments will make it any better.

I gave the frame a chance and would love it if it worked as intended, but I will not be spending any more money on it when I still don't know if I will have a rideable bike.

14
29er / Re: FM1002 / FM1166 - 150mm frame
« on: December 12, 2021, 11:13:11 PM »
On the lower trunnion shock mount, are there bearings or bushings there? The bolts look similar to other pivot points that contain bearings so I'm curious. The shock shouldn't move much in relation to the frame at the bottom mount, but will move some so I'm hoping they have done something to accommodate the movement.

I want to buy this frame as I'm in need of one, but I'm a bit skittish as the owner of an unrideable AM831...

15
Different cranks use different axle sizes and different BB attach to the frame differently depending on the standard which also specifies the BB outside diameter. So a normal PF92 BB has a 24mm axle and will work with any Shimano crank or that has a 24mm axle. There are other standards that are bigger and take a bigger axle which is usually stiffer. There are some aftermarket companies that make a BB for a certain standard but that accepts a bigger axle. The only problem is there is less room for the bearings so they have to be thinner and are normally less durable.

The ZTTO thread together BB for PF92 is wider than a normal one which would probably be an issue with a standard crank with a 52mm chainline. But a Boost crank with a 55mm chainline has an axle that is slightly longer and is what I used. With a Shimano crank, they specify to use a spacer on each side of the frame and this made the axle not long enough so I removed one spacer on the drive side which placed the crank as close to the frame as I would want and about perfect. The other side fit on the splines as intended and worked well for the AM831 frame. The crank uses one less spacer which with the extra bb width, moved the crank in roughly 1.5-2 mm VS the non drive side but I don't think anyone would be able to feel this. It also moved the crank as close to the frame as I would be comfortable with which gives it the best chainline possible which is also good. For reference, a 32T chainring has 4 or 5 mm of clearance with the frame at the tip of the teeth which is normally the closest point. However, the Shimano rings have a screw or rivet head that attaches the ring to a permanent spider which only has about 1.5mm of clearance but is closer to the BB and I think will be fine with any normal flexing. An aftermarket ring that's all one piece would give more clearance where the tips of the teeth would be the closest point.

Anyways, sorry for rambling but I dealt with this exact setup. Also, there are obviously other issues with the frame and I would advise anyone to wait until it's updated. I've only been able to ride mine around the yard and has sat in a work stand for over a month. In addition to the bad upper link design, the derailleur hanger is outside of Sram specs for 12 speed. Mine won't shift anywhere near acceptable but it sounds like most are OK with the shifting but I have to think it would be better with a correctly designed hanger. A few others have mentioned shifting problems but the other problems are getting all the attention and I don't think anything is going to be done about the hanger. I emailed Eddy over 2 months ago with pictures and the Sram technical documents showing how it's out of spec and he said it was sent to the "engineers" and every time I ask he hasn't heard of anything. I really want to like the bike but even with an updated rear end, it's just art if it won't shift correctly. I'm probably going to order a Carbonda FM1002 and maybe one day all the issues will get worked out of this frame, but now I'm really rambling...

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