Chinese Carbon MTB > 29+ & 27+
CS-FS27 vs CS-FS29, same geometry?
ChrisCarbon:
I am looking at these two frames at Xmcarbonspeed, and it seems to me like they have the same geometry.
Are these two frames the same really? Only thing that separates them is boost vs non-boost?
http://www.xmcarbonspeed.com/Productinfo.asp?f=1527
http://www.xmcarbonspeed.com/Productinfo.asp?f=1485
Bigboyblue64:
I really do prefer the Ican P8 frame to these CS frames. Has a pivot bearing at the dropout and BSA type bottom bracket. Really don't like press fit BBs. Carbon Dpeed seem a bit prehistoric to me!!
GuitsBoy:
Just to give you the flip side of the coin, doing away with the rear axle pivot both reduces weight and increases lateral stiffness of the rear triangle. IMO this is more progressive than prehistoric. Flexing seat stays are fine for lower travel, but certainly not ideal for longer travel, at least not without an obscenely high leverage ratio. As for the bottom bracket, yeah, PF can be prone to creaking, however I've found relief with the wheels manufacturing threaded pressfit BB. The mid tube is threaded, and forms a single solid BB tube, and has eliminated every hint of a creak from my cranks. Best 55 bucks Ive spent in a long time.
Another issue with the FS27 and FS29 is that youre effectively limited to 100mm rear travel. At least until someone finds a trunnion shock that will actually fit these bikes.
Anyway, after putting four or five hundred miles on my CS-FS27, you'd have a hard time convincing me to go in a different direction.
ChrisCarbon:
Anyone knows if I can fit a 130mm fork on the FS29 without any issuses..?
GuitsBoy:
Cant say for 100% certain, but I have a 140mm fork on the FS27 and love it. Might even try 150 one day. The 140mm 27.5 fork with plus tires probably gives similar height as the 130 29" fork.
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