Montague 'Hummer' Folding MTB, now 7.87kg

[Raxel]

Hi guys,

This bike is my not-so-WW commuter. Its frame folds in half at the seat tube for compact storage. Unlike most foldable bikes, this bike is built tough and is rated for mountain biking.

Folding mechanism makes the frame quite heavy (2.6kg) but I have fitted the bike with semi-WW parts so it is slightly lighter than 20lbs now.

Parts list:
Montague Folding frame
Mosso rigid fork
Am Classic hub+DT revolution spokes+Sun UFO rims wheelsets
Veloplugs
Kenda Klimax tires
KCNC seatpost
SLR XP saddle
FRM Web Ti stem
Easton EC90 handlebar
XT shifter tuned (no indicator, al bolts)
Paul Love Letter tuned (al bolts)
Nokon cables
FSA Energy ISIS crankset
American Classic BB
YBN Hollow Pin Chain
Shimano STX FD tuned (al bolts)
Shimano Dura Ace RD tuned (al bolts)
Shimano Dura Ace cassettes
Avid Single Digit Mag tuned (al/ti bolts)

Weight: 8895g (verified with 5g scale, w/orb pedals)

[mrfish]

nice work. Only issue I can see may be the use of the Aluminium bolts to hold the brake arms on. I wouldn't use these bolts here as it's an area which is mission critical with no redundancy. In other words, if it breaks you are likely to crash.

[Ghastly]

i would really like to see this one folded, nice bike!

[iride]

sweet bike, impressive considering its practicality

[Raxel]

Update:

KCNC VB1 brk lever tuned
Mrazek MOC V+ magnesium brake tuned
Ritchey-sachs 2x9 shifter tuned
XTR M901 FD tuned

now 8550gr

[Raxel]

See how it folds in half.
The left one is another folding mountain bike, BMW Q6s.

[krzysiekmz]

I could use a folding bike for commuting to work too. I just can't hide my current commuter and it draws too much attention.

Where did you get the barrel adjuster for KCNC lever?

Chris.

[Raxel]

Pic update:

Ritchey-Sachs 2x9 shifter tuned (114gr)
KCNC VB1 tuned brk levers (49gr)
Mrazek Moc Magnesium brakes tuned(66gr w/o pads)
Skinned aspide saddle (139gr)
XTR M901 FD tuned (117gr)

Going to get a KCNC 42/29 crankset soon.....

[Fitnerd]

Wow, there's a lot of attention to detail there. Extra points for how unusual it is!

[Timo]

Very nice and unusual indeed. Have you ever considered a lighter fork (or a suspension fork)?

[Raxel]

A new pic with scaled weight (pedals not included)

Very nice and unusual indeed. Have you ever considered a lighter fork (or a suspension fork)?

I'm actually looking for a trigon full carbon fork which will weigh 200g less than current fork... My final goal is reaching sub-8kg with this frame.

[Raxel]

Update:

Trigon carbon fork w/alloy pivot, 210mm cut, 481gr
KCNC RD1 compact ISIS crankset, 487gr
Smica pro stem w/ti bolts, 103gr
Kohosis ultraset, 78gr
Kohosis top cap, 4gr
BBB Ultraspace, 8gr
Carbon pulleys * 2
28H radial new wheelset

[Raxel]

Update:

KCNC 2009 XC1 K-type 42/29T crankset 662gr
KCNC VB1 brake pad shoe 34gr each
now 7870gr w/o pedals.

[bentstrider]

New poster here, but I got the same exact bike with a hodge-podge of aftermarket components.

What size/length of bottom-bracket are you using to have that large, chain-ring NOT hit the chain-stay??

The 42t I have is severely limiting me on my daily commutes.

[bentstrider]

Here's my rig fully loaded...

for a party.