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GBOMB CAMBIAR- portable tweakable longboard under test!!
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pavedwave



Joined: 22 Oct 2007
Posts: 2099


Location: seattle wa usa

PostPosted: Sun Feb 17, 2008 11:47 pm    Post subject: GBOMB CAMBIAR- portable tweakable longboard under test!! Reply with quote

A buddy who lives in the city of Vancouver WA has quietly revolutionized the modern day longboard.  With one simple, unique idea, he makes it:

1. quicker and easier to tweak and tune for different terrain,
2. even more portable for travel on airplanes, in cars, etc.,
3. just as high performing as other high-end longboards on the market.

The GBomb "Cambiar" as Mark Groenenboom calls it, is a tweaker's dream.

When it first arrived at the office, I shot a quick pic with a phone camera to show the size comparison against the 38" Mermaid.



I'm testing it over the next couple months, adding to a stream of feedback that a few other guys all over the country have been sending into Mark.  The board just asks to be tinkered with.  The brackets are sturdy, the machining is top notch, the functionality is fast and easy to use.  Right out of the box, you can mount the brackets to the deck with 8 wing-nuts and be ready to roll in just a couple minutes.

So as I get more mileage in I'll try to keep updating here.

=== Thursday 2/14

Finally a dry day in Seattle.  Rode the 12.5-mile Burke commute both directions on the Traveller version of the Cambiar.  

24" deck
28" wheelbase
76mm BigZigs Lime+Lemon
Randal 150s
- Front: GreenStim bottom, Orange Khiro barrel top
- Rear: Yellow Khiro barrel bottom, Red Radikal top
Front wedged 10-degrees
Rear dewedged a few degrees

The deck is thin and light - springy somewhat like a Loaded flex 2 or 3, at my 165 pounds.   With this truck setup, it makes an excellent hybrid carver-pumper, and on the slight declines, I could keep a strong pump going.  I drove it really hard and could manage the slightest rail-bite in doing so, not something I would expect in typical usage however, as I was really investing a lot of downward force, cranking each pump really hard for just a minute or so.   The springiness you get from it makes it a breeze to hop from one foot to the next, switching stances and switching push foot.   I'd like a little more deck length, to be able to cross-step with more ease when shifting stances, and personally I'm into a little more deck width, but actually this deck is quite ample for most riders at 9-1/4" in the middle.  

=== Friday 2/15

Spent another day on the Traveller, this time a shorter ride, just some smooth carves down a local hill.  Quickly changed up the rear truck to wedge rather than dewedge  (a total truck tweak taking about 5 seconds!) and carved a while.   Nice, sticky turns.  Didn't really crank it past 15mph, turning hard, even trying to carve back uphill before leaning into the next turn.  Will try more of this on this board later!!

=== Saturday 2/16

Hacked up a Roe Blem, very rough cut, this is definately not the finished shape, but just wanted to get something functional onto the other set of burlier brackets to test out a longer wheelbase.   This platform is wider, longer, stiffer, and the resulting feel is the kind of snap I'm typically looking for in a pumper.  I'm amazed how versatile the Cambiar brackets are!

Longer deck  (length and shape not final yet)
32" wheelbase
75mm Purple Skunk Avilas
Bennett front, SplitFire rear on Randal DH plate
- Front: Orange Khiro barrel top, Orange and White Khiro bottom
- Rear: Blue/Red Khiro combo in the Split
Front wedged 10-degrees
Rear dewedged a few degrees







=== Sunday 2/17

Brought the two boards to the garage and had a few other guys check them out.  I played on the bigger deck for almost an hour before everyone showed up, a lot more plank to walk on, this is nearly the size I want, but the length might be creating a wheelbase that's just a tad too cumbersome to pump.   Will plan on trimming the deck back another inch or so and redrilling.  

Three of us ate some concrete due to wheelbite, actually "lever-bite", where the adjustable lever bit into the soft 72a Avilas.   That was completely my fault, these were the first Bennetts to be mounted on the Cambiar system and running big wheels.  Although I did check the turns by hand beforehand, it was the extra torque of the rider that pushed them just far enough to bite.  At least Jackman and Corey had a slower fall and both rolled out of theirs gracefully.  Mine came last and I was going at a pretty good clip, and slammed.   Very Easy solution:  moving to 5.0 Bennett hangar  (fits this big a wheelbase better anyway), changing the bracket to the thinner one on the Traveller version, and changing back to BigZigs from Avilas, since the Zigs are more center-set, not as much "meat" on the inside of the wheel.

The ride is awesome.  I'm already starting to ponder that this might be THE setup for some long distance cross-state rides already  (STP anyone!?)





Off to Canada tomorrow for some R&R so I'm packing it along!



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jat.



Joined: 28 Jan 2008
Posts: 91


Location: Norway, the realm of crappy weather

PostPosted: Mon Feb 18, 2008 12:16 pm    Post subject: Reply with quote

... Genious.
How available will these be for the public? .. if at all?
I would love something easy to pack... and that actually works.
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Gawd
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camel



Joined: 22 Feb 2008
Posts: 108


Location: Atlanta - Sugar Hill, GA. 30518

PostPosted: Fri Feb 22, 2008 8:21 am    Post subject: Reply with quote

I am testing the Cambiar right now. This thing is cool. He says he may develop a top mount version of the system as well. Very fun ride...
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edp_swakakin



Joined: 19 Apr 2008
Posts: 200



PostPosted: Sat May 17, 2008 11:27 pm    Post subject: Reply with quote

How did I miss this!!!!  I KNEW IT - I looks perfect!!!

I'm used to the extra height of the Cross Step already.  (I feel I could push the ultra on it if I had too)

Even if I have to put a raiser on it - it will still be lower.

The big question for me is will the flex be too much.  I see what you mean by a stiffer deck and tighter trucks now for a true ldp pumper.

2:25 am Gawd I have get some sleep....
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pavedwave



Joined: 22 Oct 2007
Posts: 2099


Location: seattle wa usa

PostPosted: Sat May 24, 2008 10:52 am    Post subject: Reply with quote

Tinkered a bit more with the board shape.

Maximized the width at both nose and tail for best pumpability, and still finding the balance between getting max turn on the front Bennett, and yet avoiding wheelbite with that front notch.  

The drum sander is coming in really handy now.











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lone_deranger



Joined: 05 Oct 2008
Posts: 71


Location: Hampshire, U.K.

PostPosted: Sun Oct 05, 2008 9:24 am    Post subject: Unsupported distance travel rig Reply with quote

I am very interested in the development of the Cambiar. I am looking for a travel rig that would complement my lightweight hiking kit for unsupported distance travel. At present my kit weight is around 12-15kg. Ideally I would like a robust, lightweight longboard that can be split into deck and running gear enabling me to pack the board WITHIN the pack and balance out the weight when the roads run out, as well as a lowered platform to minimize the stepdown when having to push big wheels while lumbered down and having my balance shifted. Over on SVF I noticed that Subsonic were drafted in on one of the earlier prototypes. I love the work and care Scott puts into his decks and  would very much like one of his custom creations of my own. I'm planning a trip through southern Asia at the  beginning of next year and was wondering as to the feasibility of such a setup having drawn much inspiration from Rob Thomson and his epic journey. Any advice would be most appreciated. Spread the stoke.
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mrgumdropman



Joined: 06 Aug 2008
Posts: 26


Location: Sea Girt NJ

PostPosted: Sun Oct 05, 2008 4:29 pm    Post subject: coincidce Reply with quote

but Cambiar means a bad word in spanish just saying.  Soy un gavuacho pero yo hablo mucho espanol
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egret



Joined: 18 Jun 2008
Posts: 464


Location: Southern California

PostPosted: Sun Oct 05, 2008 6:32 pm    Post subject: Re: coincidce Reply with quote

mrgumdropman wrote:
but Cambiar means a bad word in spanish just saying.  Soy un gavuacho pero yo hablo mucho espanol


In spanish it means "to change".  I'm not familiar with any double meanings.  Always willing to learn new cuss words.  What's the other meaning?

When are the brackets going to be readily available?
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pavedwave



Joined: 22 Oct 2007
Posts: 2099


Location: seattle wa usa

PostPosted: Mon Oct 06, 2008 4:39 am    Post subject: Reply with quote

As for availability, I've pinged Mark again on this for you guys, it's been a while since he and I have chatted.  The plans for the bracketed-deck "Fathom" are somehow tied in with Loaded, so it keeps the timeline a wee bit more mysterious and he may not be at liberty to divulge.    I'll let you know if I hear anything back or maybe Mark will stop by here.    Oh and it's gavacho   Razz
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egret



Joined: 18 Jun 2008
Posts: 464


Location: Southern California

PostPosted: Mon Oct 06, 2008 10:20 am    Post subject: Reply with quote

How does the wedging feel on the front truck?  The brackets in the pictures look like they are better for dewedge than wedge.  The front looks like it only wedges about 10 degrees.  The brackets are designed with the needs of downhill in mind not LDP, am I right?  Maybe a poormans version could be made without the adjustments.  Just the bracket and then wedging could be done traditionally.  The only advantage would be portability, though.
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edp_swakakin



Joined: 19 Apr 2008
Posts: 200



PostPosted: Mon Oct 06, 2008 9:02 pm    Post subject: Reply with quote

Gbomb Brackets Information Update:

James first introduced me to the Gbomb brackets, after the first Ultraskate I did with him.  From the moment I stepped on them I immediately fell in love with them.  I saw so much potential in them in ways that at the time I did not fully understand.  At the time my goal was to create a hybrid board that was to be a full LDP board with the benefits of being lower for pushing.  In setting up for my second Ultraskate Mark graciously gave me a set of his brackets free with the condition that I use them for my next Ultraskate.  Over the next month I proceeded to dial his brackets combined with a Loaded Dervish deck as best that I could.  Being new too pumping I had to learn fast in terms of setup and feel.  James website has been an invaluable tool for learning.  He took all of the guess work out of trying to setup a good board.  The board minus the trucks were very similar to the Loaded Fathom board that Loaded and Mark are currently designing.  My deck was based on the same length as the Fathom so we proceeded just to call the deck the Fathom Proto.  The true Fathom was not designed to be a pumper deck.  From what I understand the deck will be a commuter board.

After skating with James on the 2nd Ultraskate I also learned that even though the Fathom proto was pump-able it wasn’t really ideal for any real length for multiple reasons.  One: the loaded deck proved to be too soft and even though the deck was fun to ride, there was a significant loss in power when pumping.  Two:  By having the truck essentially on top of the deck it created a pendulum effect on the board that again equated to loss in power for pumping.  Having learned this Mark offered to continue to work with me in order to try to get this board as close to LDP as possible.   Mark and I work for the next couple of months tirelessly going back and forth with different ideas and setups.  What I learned is that the closer you get the truck to the bottom of your foot the better the board will pump.  James had already proved this.  This creates a flaw in the whole dropped LDP idea.  As you pull the truck closer to the bottom of the deck you run into an unavoidable problem which is wheel bite.  Even if you have the truck lower but away from the foot you will still lose power and again touch upon the pendulum affect.  

After learning all this, again Mark and I just proceeded forward with still the idea of getting it as close to LDP as possible.  What came next was a complete redesign of the front bracket, and a less aggressive drop back bracket.  After many miles of testing it became very clear that a dropped design would most likely never become a Long Distance Pumper.  But after much riding and testing I discovered that another trade off took place.  What was gained, was leverage and control.  Enough so that I now could pump up extremely steep hills.  Having the deck at 4 inches instead of 4 ½.  it does have a lower center of gravity.  The trade off is that I have to exert much more energy to pump.  So much that I generally only pump about a mile or two at a time.  In comparison to other full pumpers the trade of is significant.

Even though the board was not the most efficient at pumping I still found myself gravitating towards the new design day after day.  At times I love pushing as well and the extra half inch proved to be just enough to be a bit more comfortable.  The board also became clear that it was extremely versatile.  I quickly adapted to this, and by having a lower center of gravity sliding and other tricks started to seem a bit easier.  That’s not to say you can’t do these things with a full pumper, because you can.

All of this simply started as a hobby to create something new.  It was thought that we would not continue past hobby status.  But Mark and I feel because of it uniqueness the board has merit, that perhaps others might enjoy.  I am aware that I do not have years of skating experience, and perhaps this does not qualify me to design a board. But that doesn’t change the fact that I have a tremendous amount of love for all forms of skating, primarily LDP.  This is all thanks to James Peters.  I hope that all see my love and passion for the sport, and how grateful I am to James.  

We are now trying to bring this board to light, and are still in the process of deck design.

This is how it stands currently:

There is the Loaded Fathom which Mark and Loaded are working in collaboration.

Mark currently sales a 24 inch Cambiar deck with a set of his normal 2 ½ inch wide brackets.  These are the same brackets that I used in the 2nd Ultraskate.

FUTURE:

Mark will sale a less aggressive drop bracket that brings the truck closer to the bottom of the deck.  This helps reduce the pendulum affect mentioned before.  It also creates a more rigid feel in the entire board.

A new redesign front bent bracket that will be better suited for pumping for a front Bennett truck.

A new 28 inch shape Pumper\Carver deck is still in the works.  It’s designed to capitalize on the new redesigned brackets.
.

This video was taken at Dorney Lake by Keith, it shows what the board will basically look like.  I packed it in my suitcase for travel.  It also shows the older back bracket.  The new one looks the same but has a less aggressive drop.

I hope this helps clear up some information.

Eric


Link
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rodgon



Joined: 16 Jul 2008
Posts: 91



PostPosted: Sat Oct 25, 2008 10:39 am    Post subject: Reply with quote

so has anyone tried a 6.0 bennet with a 149 tracker rts on these? i tried one out with some randall paris hybrids and it pumped ok, but since it was someone elses garage boards setup it had harder bushings and not really setup for pumping ( still was able to though, a little tiring but doable) well anyways.. i have started the process of getting one and i was hoping for some info before i bought the trucks.


thanks!
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edp_swakakin



Joined: 19 Apr 2008
Posts: 200



PostPosted: Sat Oct 25, 2008 10:21 pm    Post subject: Reply with quote

rodgon wrote:
so has anyone tried a 6.0 bennet with a 149 tracker rts on these? i tried one out with some randall paris hybrids and it pumped ok, but since it was someone elses garage boards setup it had harder bushings and not really setup for pumping ( still was able to though, a little tiring but doable) well anyways.. i have started the process of getting one and i was hoping for some info before i bought the trucks.


thanks!


Hey rodgon,

Funny you asked…I was just rolling around with them a good part of the day today.  For a top end speed 6.0's are kind of better.  And for sliding and pumping the 149’s don’t break away as fast but when they do there definitely more stable.  Makes sense for a wider truck.  But after a slide it was more difficult for me to get going again.  That being said they don’t turn as sharp.  Again makes sense for a wider truck.  But by the end of the day I was still back to my 5.0’s and 139’s.  I just like being able to turn on a dime.  With the brackets I like a blue orange barrel combo for the back truck.  It may seem loose, but keep de- wedging it ever so slightly on the back bracket to find the sweet spot.  It will give you a hint of stability that has a spingy-ness to it.

Marks brackets with a pumping setup still pumps pretty darn good.  You will be even lower to the ground then than my above setup.   With a 27 inch cut dervish at times I would scrap…..Being that low created a fearlessness in me very quickly.

His Cambiar deck is great as well, I have never tried them with a pumping setup.  But with Randal’s the brackets feel great.  The deck is truly dialed to work synergistically with the brackets.  

Here is an older short video clip of me pumping using his regular brackets on both front and back.


Link


Hope this helps..
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Bullwings



Joined: 01 Aug 2008
Posts: 62



PostPosted: Mon Oct 27, 2008 12:53 am    Post subject: Reply with quote

What's the difference between the new and old brackets?

Which brackets are currently on sale?

Are the brackets only available for sale?  If so, how much?  Length of time for delivery?

Thanks.
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edp_swakakin



Joined: 19 Apr 2008
Posts: 200



PostPosted: Mon Oct 27, 2008 9:05 pm    Post subject: Reply with quote

The difference between the original and the new curved brackets are the amount of drop.  His new design has less drop.  This is not to be confused with the new front bent bracket.  The bent bracket was designed to get the truck as close to the bottom of the front foot as possible while still avoiding wheel-foot bite.  It is not adjustable on the fly as with his other brackets, although you can still adjust the truck angle by de-wedging it.  I was able to get his original curved brackets to work with the new front bent bracket.  But in order to make this work and level the board I had to add thick back risers along with double black barrel bushings for the back truck.  This is what prompted the change for the less aggressive drop performance curved bracket.  I say performance because at the moment I received the prototype for this bracket I noticed a major increase in the way the overall board was responding.  Everything became far easier; the board became more rigid.  It effectively did away with the sagging pendulum effect I mentioned before.   Even though with the new brackets the deck is effectively higher off the ground, the increase in performance is significant.  Currently with the new brackets the deck sits at around 4 inches.



Currently Mark has in stock and sales his original “medium pusher” 20 mm dropped curved brackets.  He also has in stock and sales his Gbomb signature 24 inch Cambiar deck.  

He does sale the brackets separately, but it is my understanding that he prefers not too.  I know for a fact he is extremely passionate about providing an unforgettable skateboarding experience.  He spent a long time getting the Cambiar dialed just right for the brackets.  And believe me it shows, the moment you step on it you will see why.  It is an excellent pushing deck.  For him to only sell the brackets without a deck is like yin with no yang.  His fear is that people my go there own way in cutting a deck and not have a good experience with his brackets.      

The new “performance” dropped 15 mm curved brackets may go on sale as soon as December.  

The new front bent bracket will most likely come out before summer of 2009. (Maybe sooner)

The new 28 inch Pumping\Carving deck is yet to be determined for release.

For pricing feel free to contact him at his Website.  He is always stoked to meet new customers.

On a side note I’m truly grateful to be working with Mark.  I have a tremendous amount of respect for him as well.  He has been a true friend to me from day one, and he brings out the very best in me.  He is a class act in everyway.

Eric


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