Montague 'Hummer' Folding MTB, now 7.87kg

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Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by 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)

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Last edited by Raxel on Tue May 12, 2009 7:51 pm, edited 1 time in total.

mrfish
Posts: 1655
Joined: Wed Mar 28, 2007 12:49 pm
Location: Near Horgen, Switzerland

by 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.

by Weenie


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Ghastly
Posts: 465
Joined: Mon Aug 14, 2006 2:43 pm
Location: Belgium

by Ghastly

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

iride
Posts: 169
Joined: Wed Aug 20, 2008 5:47 am
Location: MD

by iride

sweet bike, impressive considering its practicality
ALU is my friend

Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by Raxel

Update:

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

now 8550gr
Attachments
xtr_fd.jpg
mrazek1.jpg
cockpit3.jpg

Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by Raxel

See how it folds in half.
The left one is another folding mountain bike, BMW Q6s.
Attachments
BMW_w_hummer.jpg
BMW_w_hummer_0.jpg

krzysiekmz
Posts: 1086
Joined: Sat Nov 10, 2007 4:23 am
Location: Poland/Toronto
Contact:

by 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.
Orbea Oiz - xxxx
MSC Koncept Carbon Di2 - 6955g
Leichtkraft Team Carbon - 6868g.

Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by 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.....

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User avatar
Fitnerd
Posts: 280
Joined: Fri Apr 25, 2008 10:31 pm
Location: Colorado

by Fitnerd

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

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Timo
Posts: 1382
Joined: Mon Jan 24, 2005 12:10 am
Location: Amsterdam, the Netherlands

by Timo

Very nice and unusual indeed. Have you ever considered a lighter fork (or a suspension fork)?
And if I ever meet an aardvark, I'm going to step on its damn protruding nasal implement until it couldn't suck up an insect if its life depended on it.

Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by Raxel

A new pic with scaled weight (pedals not included)

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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
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by 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

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Last edited by Raxel on Tue May 12, 2009 7:52 pm, edited 1 time in total.

Raxel
Posts: 1044
Joined: Wed Feb 27, 2008 3:41 pm

by Raxel

Update:

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

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bentstrider
Posts: 3
Joined: Tue Jun 09, 2009 9:48 pm

by 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
Posts: 3
Joined: Tue Jun 09, 2009 9:48 pm

by bentstrider

Here's my rig fully loaded...

for a party.

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by Weenie


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