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Re: Spcycle 2023 New Travel 120mm Super Light 29er full suspension frame
Hey man, its been a few months. Have they sent you your new frame yet? I would not trust buying the 861, even though it's an aluminum rocker since the failure also happens in the rear triangle upper link, indeed the 868 has a new rear triangle hopefully is bug fixed September 20, 2024, 02:16:47 PM |
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Re: Spcycle 2024 New M868 Downcountry Full Suspension Frame
Did SP-Cycle replace your broken frame? It's been a few months... Wasn't me, it's another federico I own a Carbonda 936 and so far really happy about it September 20, 2024, 02:37:55 PM |
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Re: Simple question for you geometry gurus…
I saw an interesting video of why you can't just replicate geometry numbers on a hard tail and full suspension and expect them to feel similar. (Edit: Looks like my desktop browser doesn't embed the video well. Search "Are you riding the right size bike? | Bike Geometry Explained by Jeff Lenosky" if you can't see the embedded video.) The youtuber, Jeff Lenosky, is a skilled biker and settled on a reach 40mm shorter on his hard tail for a similar feel to his full suspension bike after trial and error. Geometry changes very differently through suspension travel on a hard tail versus a full suspension bike. Even at sag, the bikes with the same reach on the geometry charts have changed in different ways. On a full suspension, the "effective" reach shortens as the suspension squats. On a hard tail, the reach feels like it lengthens. Other geo numbers also probably change quite differently as the suspension squats. September 26, 2024, 02:13:03 PM |
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Re: Simple question for you geometry gurus…
Interesting take, I’ll definitely check the video out… It's not just the seat tube angle that changes. Even standing, the "effective reach" changes as the suspension travels depending on the type of suspension. I was surprised that a reach difference of 40mm made the bikes feel similar. September 26, 2024, 02:31:43 PM |
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Re: Simple question for you geometry gurus…
If ETT is the same on both bikes they shouldn't feel any different when seated and stationary. Effective top tube calculation accounts for differences in seat tube angle. Effective top tube is the virtual distance from a horizontal line that runs between the top of the head tube and the imaginary line extending from the seat tube that it would intersect. Think of it as the "seated reach" of the bike. And reach is the distance between a vertical line that runs through the bottom bracket and the top of the center of the head tube? So this is the "standing reach" of the bike. Look at the Light Carbon 917 and 918. The 917 has a shorter reach (421.2) but slightly longer top tube (600) because it's seat tube angle is 73. The 918 has a 14mm longer reach (435mm) but shorter top tube (598.8MM) because it's seat tube angle is steeper (74.75). With same seat, stem, spacers, bar; these 2 bikes should feel very much the same when you sit on them. In your case things will be a little different because the FS will sag a little so I think puts your weight back a little more than the HT. But how far you have to stretch to hold the grips should still be the same. September 27, 2024, 08:30:44 PM |
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Re: Simple question for you geometry gurus…
https://madscientistmtb.com/bike-geometry-compare/ Input both bikes into this calculator. To compare hardtail properly, input at the top a negative fork travel for how much sag you have. Then in the bottom calculations, "Calculated Seated Fit" is saddle to bars. You'll find that with the same ETT, your saddle to bars will be very close and it's the reach that differs. So it'll feel similar length while seated, but your body is rotated forward with a bit more weight on the hands, but a steeper STA longer reach bike will feel longer while standing. The picture visualization is perfect to see how they compare, then if you really like your current fit, you can see how stem, stack, handlebar, etc changes will dial it in, so you can make a good guess at what size components to start with. September 28, 2024, 08:14:11 AM |
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Re: Simple question for you geometry gurus…
Cerps is correct, if the seat tube angle is steeper then the Reach will be longer to get the same ETT - if the head tube angle is slacker then even more so. A lot of people that "size down" end up feeling cramped on the newer geo bikes if they spend a lot of time in the saddle - which a lot of us do. Also, you will be more over the BB than behind it with the steeper STA, which is good for steep climbing, but can take some getting used to on flats/rolling for some people. October 03, 2024, 05:50:32 AM |
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Re: Carbonda CFM1001 / DIY Carbon DCB F140 Fork travel limitations
Didn’t think that would be an option, good point. Looking at a 2022 Rockshox Lyric Ultimate RC2 29”, in red…. Could that be done to this type of fork? Yes. That can be done. Just google the fork name and then air shaft and you will fine options. October 09, 2024, 10:11:40 PM |
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Re: DIY Carbon -DCB F140 Frame
Looks really good!
November 12, 2024, 10:05:44 PM |
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Re: DIY Carbon -DCB F140 Frame
It looks to be same frame as Carbonda FM1001 discussed here quite a lot :-) It is the FM1001, and Vortac acknowledged that in another standalone thread they made about the DIYCarbon version. Still coming from China with a middle man when no one seems to have an issue dealing with Carbonda directly. Curious what DIYCarbon will actually offer that is different. Seems like their US presence doesn't actually mean anything if the frames are painted and shipped from China. November 14, 2024, 09:51:23 AM |
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