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As the title states, I'm up on the fence between the Mojo HD 140 and the Pivot Mach 5.7. Has anybody here ridden both? If so, why did you choose the Mojo HD 140 over the Mach 5.7?
 

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There were some observations about these bikes at feedthehabbit.com. Look in the comments from readers about the 5.7.
 

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I'm on the fence next to you.

I am having the same internal discussion; but throw in the 5 spot as part of the equation.

What I like about the HD140 over the other two is the weight. It is just over six pounds and I think it is probably almost as laterally stiff as either of the other two. I have ridden the Pivot Mach 5 and the 5 Spot, both are amazing. I am not a weight nut, but I like the flickability of a lighter bike. I think it is basically a pound lighter than the 5.7 and a pound and a half lighter than the 5 spot. I was in Fat Tire Farm (Portland) this weekend looking at one built up with a 160 mm fork. I would not go that way, I like to climb and that is not for me; though the bike weighed 28 pounds--amazing. The bike is probably the coolest looking bike I have ever seen.

Ultimately, I am going to demo both this spring or early summer, as soon as I can. I think with these three bikes you are splitting hairs, so it is going to come down to what feels best.

I will post after demo'ing.
 

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I personally don't think it's a very tough decision to make, but I'm a biased owner of what I personally feel is the best AM frame in terms of stiffness, weight, and the ability to adjust a single frame toward XC or Mini-DH from that "AM" starting point (if that makes sense). I prefer carbon, I prefer Ibis, and as great as the Pivot or Turners may be I don't think the decision is very tough. :)
 

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I don't know the geometry of the Pivot, but keep in mind that the 5.spot head tube is quite a bit longer than the one of the Mojo. So if you prefer a lower cockpit for better climibing, etc. go for the Mojo.
 

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Both bikes come from great companies well known for top customer service. A very fast rider/racer I know has broken two Mach 4 swingarms "just riding along" and Pivot replaced them quickly. Ibis CS is the best in the industry.

Both the HD140 and 5.7 have about the same weight, geometry, and travel, TT lengths and wheel base may be different. So handling would be similar. Both are build very stiff, the HD stiffer.

The HD was designed to endure much more travel and big hit use, similar to the Firebird. No one knows for sure, but the HD will most likely be more durable than either the Firebird or 5.7. Well done carbon fiber is far more durable at the same weight bike and travel as aluminum.
 

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The HD is one of the most versatile bikes out there. It can be configured to do just about anything, and do it well. So it gives you a ton of flexibility to adjust as your needs and desires change.
It is the most fun I've had on a bike in a while.
Also it is kind of surprising how well it climbs even with a leggy fork.
 

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I saw someone post this on your topic in the pivot forum

"CF full sus frames break more often than aluminum full sus frames."

That is very much not true whatsoever at all and, bogus advice I might add. I get that some people still think that carbon is a fad and might break if you look at it funny, but it's pound for pound a LOT stronger than Al and very very tough. As of right now it's the best material to build a frame out of.

My advice is to ride both bike with similar builds if you can and chose the best deal for you. Both are great and you can't go wrong with either. I will say that since riding a carbon Ibis, the ride is much better than riding any of my older AL full sus frames. I heard Pivot has great CS as well, but look at what Ibis has. I think Ibis has the best CS in the biking industry bar none.
 

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I have never broken an aluminum bike, I poked a hole in the swing arm on my Mojo in the first month. Carbon fiber may have many advantages but tolerating "attack" from pointed objects is not one of them. Just sayin'.
 

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SMT42 said:
I have never broken an aluminum bike, I poked a hole in the swing arm on my Mojo in the first month. Carbon fiber may have many advantages but tolerating "attack" from pointed objects is not one of them. Just sayin'.
Very true, But it's much stronger with stress and flex than Al. Don't poke holes in your bike.
 

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Yea, I'm not sure that any material is impervious to attack from pointed things. If you think that carbon is weak in those situations, then try taking a ballpeen hammer to your aluminum frame and see how it does.

My personal opinion is that any impact that would knock a hole into carbon would have severely dented or mangled aluminum/steel to the point that it would need to be replaced too. My two cents!
 

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doismellbacon said:
The Mach 5.7, IMO, is the ultimate 26" wheel bike..... in a world with no Mojo HD, that is.
lol the Mojo HD, IMO, is the ultimate 26" trail bike...in a world where crash accidents never occur :)

aluminum, at the same weight as CF, will certainly flex more. Translated into riding it leads to that 'uncertain' feel that some ppl hate....hence to achieve the same stiffness of a CF bike (Mojo), aluminum has to use more material in its manufacturing process (Pivot).

for that same reason, thats why aluminium takes to pointed strikes (usually when the bike hits a rock as speed) better than CF, coz the aluminum, once the force exceeds its max limit it will only deform/crack at most.....while CF, once it exceeds that threshold(which is higher than you think actually) it can only crack/shatter......its a give or take situation....

The angle of impact also matters......carbon fiber can be built to be vv strong in absorbing impact at a particular angle depending on the direction that the carbon weave is layered.....but doing so sacrifices strength in other directional forces.......I'm not sure of Ibis's approach to their material build....but aluminum is ...lets say not vv strong in any particular direction but not weak any either. So assuming that i crash my bike, if i was on a Mojo HD i would pray that the bike landed on a rock at the appropriate angle, while on a Mach 5.7 it would be that the bike steered itself to land on a reinforced area :)....

hence it depends on ur riding style...if you're the type who tackle rock gardens while feathering ur brakes to maintain a 'safe' speed go for the Mojo HD :) ....but if u belong to/seek to join the no holds barred grp of crazy ppl who seem feel that life is too long and hence fly down rock gardens...go for the Mach 5.7......

Cheers and happy riding
 

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The "carbon fiber will explode" myth is now :rolleyes:LD and tiresome.

I challenge anyone to show me pics of a 'frail and dainty' HD that's been injured. Put up some evidence or stop spreading the myth.
 

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Oh boy...
No offense, but I think it's time to update your understanding and expectations of modern composites. Today, well designed composites won't shatter when they fail, and they'll have far higher impact resistance, regardless of direction, than typical aluminum frames. Start digging, and you'll find info on the subject, some of which is 12 yr old stuff from Scot of Ibis. There's a lot of new stuff out there talking about carbon rims as well. The old thinking that "Carbon snaps", is dead and buried.

I'm not a composites engineer, and I don't have a test rig in my garage, but I can tell you from MANY experiences, that a big sharp hunk of limestone makes a hellacious baseball-bat-cracking noise when it smacks a Mojo downtube or chainstay...but that's it... no damage. I've also seen plenty of aluminum bikes snapped in two at the head tube, bb area, seat cluster, etc etc. An impact that will dent the ***** out of aluminum, but leave it rideable, will typically make a mark in the clearcoat of a good carbon bike, but that's it.

Other brands' uber light carbon race bikes may be fragile, but not the Mojo... and certainly not the HD.
 

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If you can get a test ride on both that would let decide which you prefer.

If it matters the Pivot can hold a water bottle in a reachable position.

I haven't ridden a 5.7, but rode a Mach 4, it was a very smooth ride, but for me it was the looks and the way the Mojo absorbed trail chatter that won me over.
 

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mtb143 said:
The "carbon fiber will explode" myth is now :rolleyes:LD and tiresome.

I challenge anyone to show me pics of a 'frail and dainty' HD that's been injured. Put up some evidence or stop spreading the myth.
You know it is pretty remarkable the number of HDs that exist and the number of non-damaged HD threads that don't exist. I suppose we're all "feathering our brakes to maintain a safe speed in the rock gardens" ;)
 
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