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Re: Carbonda FM909
Arrived. 1827g with all mouting bolts, RD hanger, cable liners, outer housing bushings. No bottle cage bolts, no shock, no protection plastics, no seatpost clamp, no headset, no BB. all bearing rotation is far from smooth (but i dont care too much). Shock bushing 8x30mm (8mm diameter x 30mm L to R) required (may not be included). I am contacting to seller but maybe i have to buy separately. Any question? May 25, 2021, 06:27:11 AM |
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Re: DT 240EXP hub clones Goldix, Venfort
In terms of geometry are similar but not the same. Also DT350 weights around 360 DT240 EXP weights around 310 And this hubset weights around 320, so in terms of weight they are more similar to DT 240 (internals are quite equal in 240 and 350). About bearings, freehub are different, compatible but Goldix freehub uses 6802 bearings and DT 6902 bearings (in old ratchet). Comparing with DT 240 EXP, this are a bit better, it uses 1526 (15 x 26 x 7 mm) bearings, so bigger ball race than 6802, so we assume that they have longer life. In terms of bearings lasting 6902 > 1526 (15 x 26 x 7 mm) > 6802... theoretically. Just a note: Goldix front hub uses 6902 and I think that it could be enough to use 6802 in this case and this will save some grams. DT240 EXP front hub 24 holes center lock -> 104 grams Goldix GDR310 front hub 24 holes center lock -> 113 grams DT240 EXP rear hub 24 holes center lock -> between 204-210 Goldix GDR310 rear hub 24 holes centerl lock -> 206 grams November 02, 2021, 06:01:56 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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Wing & Carbonda
Taking the plunge into the world of Chinese carbon was interesting, to say the least. After much due diligence, I settled on the L FM936 & M FM1001 from Carbonda. I submitted my inquiry and Wing was quick to respond with pricing & general information as to how to conduct the transaction. Communication was superb throughout - including some potential "I might add 3rd, and 4th frame to the order" conversations - and I generally had a reply within 48-72 hours, if not sooner. Frames arrived well packed, and without any issues, shipping holds, etc. Upon inspecting the frames I found the FM1001 was a L, not the M that was ordered - an easy enough mix-up when pulling orders from the inventory, so I'm not pointing blame/fault at anyone, these things happen. I contacted Wing, who requested a few photos of the serial number and the small info tag on the inside of the headtube and corrected the mix-up almost immediately. A new M frame is being shipped out, and the L I currently have is repacked, and awaiting shipping tags. Wing said they would send me the tags, to ship to another US-based customer, as soon as they were ready. As someone who's worked in the cycling industry, in several different roles, for nearly 30 years, I have to say that this is an outstanding example of customer service! As my current role dictates, I have various bikes built up to showcase a range of products, but I try to use bikes that aren't from the "Big-3" or other high visibility brands. Thanks to my experience with Wing & Carbonda, I will definitely be using their frames for my future "showcase" builds! March 25, 2022, 01:06:35 PM |
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Re: Carbonda fm936 Thoughts
Hello guys, just three questions: - how does it work with one bottle? can it handle a big one (750ml)? can we have 2 bottles? - I'm 182 cm tall, did a L is Ok for me? - Should I go for a 100 or 120 mm fork? (should be a SID SL Select) Thanks April 30, 2022, 01:40:29 PM |
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Re: Carbonda FM909
Where are you from Poland? Maybe Mazovia?I live near Poznań, I invite you to a test drive May 09, 2022, 12:37:12 AM |
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Re: LightCarbon 918?
I'd say this is definitely more on the old school side. Even the 909 when set up with 120mm / 165*42.5 (thus similar travel) is much longer and much steeper seat tube, and is going to feel a lot more capable descending and climbing really steep stuff.
July 21, 2022, 07:25:16 AM |
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Re: Carbonda FM909
Bombtrack prototype on Carbonda FM 909 frame: https://www.facebook.com/bombtrackbicycleco/photos/pcb.5518873451481392/5518853094816761 September 21, 2022, 02:06:12 AM |
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