Author Topic: Re: FM058 Hongfu frame problems  (Read 2397 times)

bournon

Re: FM058 Hongfu frame problems
« on: June 14, 2018, 03:02:40 AM »
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.

« Last Edit: June 14, 2018, 09:27:10 AM by MTB2223 »



sclyde2

Re: Re: FM058 Hongfu frame problems
« Reply #1 on: June 14, 2018, 06:23:23 AM »
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?

lRaphl

Re: Re: FM058 Hongfu frame problems
« Reply #2 on: June 14, 2018, 08:37:07 AM »
Posting your problem in all the threads about the FM058 won't solve it you know?

MTB2223

Re: FM058 Hongfu frame problems
« Reply #3 on: June 14, 2018, 09:26:16 AM »
Removed your other and the same posts in all other topic. One time is enough! Thank you.

bournon

Re: FM058 Hongfu frame problems
« Reply #4 on: June 15, 2018, 12:35:09 AM »

Ernie_Loquasto

Re: FM058 Hongfu frame problems
« Reply #5 on: June 15, 2018, 02:56:23 AM »
You must place boost gear, with only a displacement of 3 mm.

bournon

Re: FM058 Hongfu frame problems
« Reply #6 on: June 15, 2018, 03:14:05 AM »
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.