Chinertown
Chinese Carbon MTB => 29er => Topic started by: bournon on June 14, 2018, 03:02:40 AM
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We did buy the FM058 frame non boost version. But we have have quite big problems with it. We used SRAM GPX 11 speed but this frame can not fit a 32T chainring. There is only 1mm margin to rear chainstay, and the teeths eats the frame when on trails.
There must be some construction error on this frame. I can not recommend anyone to buy it now. We did order 2 frames in 2 sizes and both have this problem.
Bottom is 92mm so it is not possible to add a spacer on drivetrain side. (it should only be added if frame is 86mm)
We have contacted Hongfu but we dont get any proper answers. Just stupid questions.
(https://www.3dvision.se/0/fm058.jpg)
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That's weird. My fm058 easily fits a 34t, with room to spare. I suspect it might even fit a 34t oval ring. This is on a Shimano xtr 980 crank, which supposedly (per the specs) has a chain line of 50mm with the chainring in the middle position that I am using. This is with a 32t or 34t race face 104bcd NW chainring (with no offset).
What is the chain line of your setup? Exactly what crank and chainring are you running?
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Posting your problem in all the threads about the FM058 won't solve it you know?
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Removed your other and the same posts in all other topic. One time is enough! Thank you.
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We used standard components 11 speed GXP SRAM
http://www.chainreactioncycles.com/se/en/sram-pressfit-gxp-alloy-bottom-bracket/rp-prod75586
http://www.chainreactioncycles.com/se/en/sram-x01-11-speed-chainset/rp-prod122747
32T SRAM Chainring. 6mm offset for 11 speed setup.
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You must place boost gear, with only a displacement of 3 mm.
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This is the NON-BOOST version of frame FM058. Chainline should be 49mm. That is 6mm offset.
Boost is 3mm offset - it would help little but chainline will not be so good.