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Re: Carbonda FM909
Received my un-painted XL FM909 11/26/21, ordered 10/23/21, after being on reserve since since 9/8/21. 1973g with rear axle, no shock, no headset. Box was damage in transit, but frame arrived unscathed. Working on painting first and then looking forward to my first new bike build since 1997  December 10, 2021, 09:04:05 AM |
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Re: Carbonda FM909
 Christmas came early this year. I think I have everything, but 2cm more spacer. Already ordered. The color is amazing. When you are very close you the blue and carbon are visible. In the Light it's then really blue. Otherwise it appears very dark. So it's a effect for the rider  . For chameleon effects I always think it's an effect only others see, but the rider always sees one color. I already attached frame protectors.. will then start with the routing of hoses tonight. 
December 11, 2021, 10:02:45 AM |
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Re: Carbonda FM909
What do you mean by a "modern" leverage ratio. I mean it's not as progressive as one might want. Doesn't mean that it's bad of course. My take: The biggest difference to the FM936 is not the overall progressiveness, but the way the progression changes throughout the travel. The FM936 is more progressive in the midstroke and basically linear at the end of the stroke. The FM909 is linear at SAG point, then becomes slightly progressive in the mid stroke and more progressive at the end of the stroke. Now air shocks generally lack progressivity in the mid stroke and are very progressive at the end of the stroke. Also, with volume spacers you can even increase the progressivity at the end of the stroke. But you can't really change the mid stroke. And so with the FM909, those similar characteristics enhance each other, making it more likely to fly through its travel and offering less mid stroke support. With the FM936, the opposing curves add up to a more linear overall lev ratio, giving more mid stroke support. The lack of bottom out resistance can be countered with volume spacers. But please take this with a pinch of salt. I could be wrong 
December 13, 2021, 01:01:59 AM |
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Re: Carbonda FM909
Hi Julian, take a look at attached vector PDF. Is it enough? I can export it to CAD format (DXF or DWG) if needed. Thanks! I used your vector PDF and got pretty much the same numbers. 45mm stroke is definitely too much. If my model is correct, it has less travel than claimed though: 40.0mm stroke = 96mm of travel 42.5mm stroke = 101mm of travel 45.0mm stroke = 107mm of travel and a broken frame
December 13, 2021, 01:08:13 AM |
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Re: Carbonda FM909
This should visualize the different progression characteristics of the FM936 and FM909. The blue line is the overall force needed to go from 0 to full travel. The red line is the force needed to get the next 1mm of travel at any given point. Both shocks are the same except for a slightly bigger volume spacer in the FM936 to match the overall bottom out resistances. As you can see, the FM909 has a more pronounced "dip" in the late mid stroke whereas the FM936 is more evenly progressive. So with the same SAG and bottom out force, the FM936 will offer a better mid stroke platform and sit higher in its travel. Maybe the soft mid stroke of the FM909 has its advantages for an XC bike, but for down country, the FM936 should be better suited - also because of the 10-15mm extra travel. December 13, 2021, 04:51:26 AM |
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Re: Carbonda FM909
Why Minions on an XC bike to start with, and especially if you're counting grams? To shed half a kilo next summer
December 28, 2021, 02:49:52 PM |
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Re: DT 240EXP hub clones Goldix, Venfort
That's why I use centerlock over 20 carbon wheelsets here - most all all DT350 hubs - all 6 bolt. Never stripped out one even after repeated rotor swaps. January 20, 2022, 01:24:23 PM |
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Re: Did the FM936 post reach the page limit of the forum ?
Time to start a FM936 Volume 2 thread
January 20, 2022, 02:59:18 PM |
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Re: Carbonda FM909
Assembly finished, first ride is waiting for better weather 10,8kg in XL Size Remarks: Magura 4 piston caliper with 180mm Rotor in the rear requires filing action at the caliper otherwise it will not fit Rear axle is too long as many others already mentioned, seems to be systematic problem Lower Bolt for shock mounting is too short, shock does not move any longer when screw is tightened January 24, 2022, 03:11:40 AM |
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Re: Carbonda fm936 Thoughts
Nearly all parts arrived, so starting building wheels February 07, 2022, 02:48:43 AM |
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