more photos

Build just completed today.

I was looking for a dedicated XC race bike.  I felt my old FS 26er (a 2011 Titus X carbon, ~10kg) just doesn't cut the mustard anymore.  I tried my 29er hardtail (FM057) in a few events last year, and preferred its handling (over the 26er), but found the ride a bit too rough, so I began a search for something similar to my FM057, but with rear suspension.

For a while there, I was tempted by the M06, but then came across that thread on the French light bikes forum (by Tom in here).

After changing focus to the FM058, I was initially looking for the FM058SL, but the long lead time scared me off.  I ended up ordering the "normal" FM058 from Hong fu.  Even though they said it was in stock, I ended up waiting about 5 or 6 weeks before they shipped it.  I received the frame a few weeks ago.

I also built up a new set of wheels.

I have moved quite a few parts off my other bikes. 

This is the current build:

(*old parts scavenged off my other bikes)
Frame/shock
FM-058 17.5" UD gloss (incl all bolts) - 1960g
Manitou mcleod shock 165x38 - 252g as shipped (with bush), 242g with bush removed
RWC needle bearing kits - 21.85 + 22.2 - shock weight with hardware installed - 276g
Actual total frame + shock weight = 2.24kg
Wheels
*240s 15x100 SP CL - 122g
*240s 12x142 SP CL xd freehub 54t ratchet - 217g
28 X 302mm black cx-ray SP - 139g
28 X 302mm black super cx-ray SP - 119g
28 X 2.0/12mm brass nipples - 27g
28 X 1.8/12mm brass nipples - 27g
Xmcarbonspeed 30mm (ext) T800 assymetric rims - 303g/307g
Actual total wheel weight - 582 +682 = 1264g
With stans 27mm yellow tape  - 591/691.  Tape was 9g/rim
*Racing Ralph 2.35 speed f - 580g
Racing Ralph 2.25 speed snakeskin addix speed  r - 660g
Tubes - schwalbe SV 19A - 148/149g

Drivetrain
*M9000 xtr pedals - 308g
*M980 xtr cranks 170mm with all bolts (all except ring and BB) = 540g
*32t RaceFace narrow wide chainring 35g
Hope screw together pf41 BB - 116g
Xx1 11 speed chain - not weighed
*Xx1 11 speed cassette - 274g
*Xx1 11 speed shifter no bracket = 98g incl bolt
*Xx1 11 speed der - 245g
Brakes
*Xtr M9000 front incl all bolts - 198g (caliper bolts are about 6g)
*Xtr M9000 rear - not weighed
*Rt99 rotors 160/160 - 101g/101g
*Front CL lockring - not weighed
*Rear CL lockring - 8g
Cockpit
*3T carbon post doric ltd 400mm cut to 380mm + old selle italia slr xc saddle = 361g.   
*Cheap QR seat clamp - 42g. 
70mm uno 7 stem  - 94g (with steel bolts).  took about 9g off this by subbing in some ti bolts
*easton Ec70xc 685mm riser + esi chunky grips + end caps + SRAM shifter bracket = 222g

Other
Rear axle (supplied with frame)  - 87g
*Fox 2013 f32 100 ctd factory with remote, cable, axle, starnut & crownrace - 1710g
Cane creek 110 is52 lower,  bearing only  - 28g
Cane creek carbon 40 is42 upper  - 30g
*k-edge Garmin mount - 22g
*Garmin cadence sensor - 11g
*King ti bottle cage 30g + Ti bolts 3g
framewrap on chainstay - about 30g

stuff not weighed: cables, rear brake, front CL lockring, chain, headset spacers/topcap/bolt

Total bike weight: 10.29kg.  That's ready to race, bar a water bottle, number plate and garmin.

Future changes
9g tune seatclamp ordered.  Will save 33g when it replaces the QR clamp
setback seatpost.  Not sure which model yet.  Need about 20mm setback, with good rail support.  Like the clamp on trhe syntace p6, but it might not have enough setback.  I also like the clamp on my old easton ec90 zero post, so maybe the setback version could be good.  i saw a decent looking one on the xmcarbonspeed website too.
*SLR kit carbonio saddle - will put this on when i get the appropriate seatpost
go tubeless - once i have had a few rides and checked the spoke tensions in the wheels.

Pretty happy with how everything went together.  Haven't quite got the saddle position correct, as it is still about 10-15mm too far forward, so am looking at setback seatposts.

The main issue i have with it is internal cable rattle.  Anyone got any ideas how to stop this?  I have tried pulling the cables tight, and attempting to hold them there (at the exits) with zipties, but i think they slip.

Other than a few test rides around the streets around my house, it hasn't yet been ridden.  Rear shock seems amazingly plush, and i have it at 150psi (for my current ~77kg) with very little sag, but it is still plush and seemingly bob-free.  Did all the setup with the platform wide open though - will probably use one of the harder settings when i race it.

First proper ride is this weekend.  I think it'll be in a race situation, at one of the local club's events on sunday.

it is looking very promising.  I hope i like the "modern" geometry, which is one step beyond my hardtail (FM057), but whole different world to my FS 26er.

I will post some ride impressions here later.

So, has anyone on here got one of these frames?  I can't seem to find anyone on here with one.

It seems like some people have been scared off by the rear tyre clearance, but it might be not as much an issue as first thought.

for potential M06 owners, why would you go the M06 over the FM058, when you are after a XC race bike, and don't need boost rear spacing?

the overall geometry seems about the same (similar chainstay, 68.5vs69HA), but the FM058 seems a bit lighter.

I recently came across that french light bikes forum, and there are a few now with the FM058.  One even has switched to a FM058 from a M06, but google translate is not making it clear to me what the reasons were for the switch.  and it seems that 2.25 tyres fit, which is enough for me.  now, they have an "SL" version (T800 carbon), which one guy has received and weighed to be just on 1700g (15.5", no shock or shock bolts).

any reason why so little FM058 love on here?  is the M06 just getting more attention from XC racers because it has been around longer?

2.25 redline?  What tyre is that?  Are you referring to one of the schwalbe tyres with the addix speed compound?  If so, which one?  Another racing Ralph?

I don't think the seat tube is the issue.  It would be more the headtube - adding an inch of fork length would be putting a fair bit more torque on the head tube.