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Re: Trusted 150mm 29er suggestions The most modern candidates seem to have some concessions compared to mainstream-branded frames. Do these issues give anyone else reservations?

FM1002 Quirks.
  • The bottom bracket drop is 20mm if I'm reading the geo chart correctlty. This is pretty high for a 29er. Maybe appropriate for a mullet?
  • FM1002 kinematics are not progressive. Leverage curve is pretty flat (<10% progression) with a regressive section at bottom out. It seems like most mainstream brands have moved to a smoother, more progressive leverage curve.

AM831 Quirks.
Another recent frame that seemed promising, but has been plagued by design problems.
  • The fork hit the frame in some sizes, so a spacer was needed under the fork.
  • The first generation rear triangle was badly designed. If flexed badly, and bearing retention was an issue.
  • A new rear triangle was released for the AM831 that may have solved problems with the v1 design, but more feedback from actual owners is needed to verify

I, too, would consider an aluminum frame, but it seems modern geometry aluminum frames just aren't lucrative enough to offer to the public. Carbon frames are the default mountain bike frames available. I've also seen a video about a bad injury sustained when a Chinese frame snapped under a rider. I guess the reputation of a frame matters.
May 03, 2022, 08:21:38 PM 		1
Re: FM1001 / FM1156 - 135mm frame
Quote from: mdc302 on July 17, 2022, 10:41:01 AM
I apparently have been sent the FM1002 frame, or it has the wrong linkage… something. The manufacturer sticker inside the head tube reads FM1001. The Horst rocker link sits nosed down toward the shock at proper sag, and the upper triangle contacts the seat tube approx. 11mm before full compression of the 185/55 shock. Awaiting response from Carbonda.

It looks like your frame has the slight kink in the top tube of the FM1002.  The FM1001 looks like a straight top tube. I don't own either bike. Just looking at pictures.
July 21, 2022, 11:42:18 AM 		1