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LeakCyles DH bike

norbar

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
They lost me when they put a dhx air on their proto. I like the straight tubes though.
 
P

Pslide

Turbo Monkey
Jan 14, 2002
1,373
0
Feet on the ground, head in the clouds.
Similar to Antidote and Propain, without the full floating shock. Nice execution though.

I've got a new theory that the ideal DH bike has a 50/50 weight distribution. And I'd take 50/50 over a low COG, because I think the bike feels more balanced when pumping terrain, bunny hopping, etc. So I'm not super keen on where the weight is in this bike (too far back), but it's just personal preference.
 
frango

frango

Turbo Monkey
Jun 13, 2007
1,454
5
Not looking bad, but...
As mentioned... shock in terrible place. I'd be surprised if this shock worked properly in the frame.
Seat vertical adjustment is like 2-3cm.
Nice inner cable routing, but cables come out in the worst place. Just before BB.
 
Sandwich

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,995
borcester rhymes
wow, what an amazingly clean bike. Nice straight tubes where appropriate, curved ones where necessary. Looks like plenty of seat tube adjustment, or at least as much as is necessary. I don't know why you need +/- 6" on a DH bike. I don't know how you can crab about shock placement on this bike with bikes like the dwDHR running around with no fender nor plans for one...or the zerode with the exposed reservoir. Should at least be easy to mount a fender or guard.

Finally, on the 50/50 distribution thing, I've often wondered if there are benefits to moving the weight back as far as possible. You look at the mondraker with all of its weight slung way back and its raked out geometry...it almost looks like he's riding over the back wheel at times.
 
norbar

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
Sandwich said:
wow, what an amazingly clean bike. Nice straight tubes where appropriate, curved ones where necessary. Looks like plenty of seat tube adjustment, or at least as much as is necessary. I don't know why you need +/- 6" on a DH bike. I don't know how you can crab about shock placement on this bike with bikes like the dwDHR running around with no fender nor plans for one...or the zerode with the exposed reservoir. Should at least be easy to mount a fender or guard.

Finally, on the 50/50 distribution thing, I've often wondered if there are benefits to moving the weight back as far as possible. You look at the mondraker with all of its weight slung way back and its raked out geometry...it almost looks like he's riding over the back wheel at times.
Click to expand...
Too much weight in the back is a bad thing. I'm pretty sure the weight is much more forward on my legend than here(or on the mondraker) and on flatter tracks the front wheel looses traction easier than on steeper bikes
 
P

Pslide

Turbo Monkey
Jan 14, 2002
1,373
0
Feet on the ground, head in the clouds.
norbar said:
Too much weight in the back is a bad thing. I'm pretty sure the weight is much more forward on my legend than here(or on the mondraker) and on flatter tracks the front wheel looses traction easier than on steeper bikes
Click to expand...
I've measured my Legend. It's about 2 lbs heavier in the back than front. My front end is very light though (Boxxer WC).

I can feel a noticeable difference when I swap my steel spring for a Ti spring. The shock's weight is pretty far back, and right between your feet. With the Ti spring the back end feels livelier when pumping down terrain and getting the bike light. Maybe the ideal weight distribution is not 50/50, but it would be fun to experiment with this. I remember a magazine strapping weight around different points on a bike to determine what was best, but I don't remember the outcome or what magazine it was...
 
norbar

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
Pslide said:
I've measured my Legend. It's about 2 lbs heavier in the back than front. My front end is very light though (Boxxer WC).

I can feel a noticeable difference when I swap my steel spring for a Ti spring. The shock's weight is pretty far back, and right between your feet. With the Ti spring the back end feels livelier when pumping down terrain and getting the bike light. Maybe the ideal weight distribution is not 50/50, but it would be fun to experiment with this. I remember a magazine strapping weight around different points on a bike to determine what was best, but I don't remember the outcome or what magazine it was...
Click to expand...
I also run a WC + a <1kg front wheel and a tubeless tire so that may be the problem. Though I just put a progressive ti spring on the back. Really light so maybe I will feel the differance. I doubt I will feel the 50g I dropped on the dura ace or the 150g's on the pedals ;)
 
S

Slater

Monkey
Oct 10, 2007
378
0
Not a bad looking bike. Save for the oversized rear triangle machined monoliths, it looks very utilitarian.

So do I see a trend here? "50/50 weight distribution" seems like the new "low COG". Like the shock being 8" behind midpoint of the wheelbase makes even 5% of the weight distribution difference that bending your elbows 10* less does (and the associated weight shift of your center of mass which is roughly 75-100x the weight of you shock).

 
norbar

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
Slater said:
Not a bad looking bike. Save for the oversized rear triangle machined monoliths, it looks very utilitarian.

So do I see a trend here? "50/50 weight distribution" seems like the new "low COG". Like the shock being 8" behind midpoint of the wheelbase makes even 5% of the weight distribution difference that bending your elbows 10* less does (and the associated weight shift of your center of mass which is roughly 75-100x the weight of you shock).

Click to expand...
Probably yes though I don't like when a bike forces me to ride outside of my natural position because the weight distribution/geo is ****ed up. I've been there. Probably more due to geo though.
 
C

cseymour

Chimp
Jan 26, 2009
2
0
if they too the zumbi approach tot he seat tube it would have more seat adjustment. the shock is positioned basically in the same location as a v10, just more vertical. i wonder how it rides, takes awhile to get vpp (counter rotating links) bikes to ride the way the do.
 
William42

William42

fork ways
Jul 31, 2007
3,926
671
I'm sure that shock/placement would work really well on loose gravelly stuff and in thick mud.

If you like breaking shocks, that is.
 
P

Pslide

Turbo Monkey
Jan 14, 2002
1,373
0
Feet on the ground, head in the clouds.
Slater said:
Not a bad looking bike. Save for the oversized rear triangle machined monoliths, it looks very utilitarian.

So do I see a trend here? "50/50 weight distribution" seems like the new "low COG". Like the shock being 8" behind midpoint of the wheelbase makes even 5% of the weight distribution difference that bending your elbows 10* less does (and the associated weight shift of your center of mass which is roughly 75-100x the weight of you shock).
Click to expand...
When it comes to how a bike feels underneath you, you don't consider the weight of the rider in the equation. The rider becomes sprung mass and the whole bike becomes unsprung mass. Your hands control the front part of the mass, and your feet control the back part. When you're riding flats, you can really notice a change in weight on the rear of the bike when you're getting the bike light over roots, obstacles, etc. At least in my experience.
 
fluider

fluider

Monkey
Jun 25, 2008
440
9
Bratislava, Slovakia
When looking for Blk Mrkt Roam dropouts picture I by change found pictures of new Zumbi frame. Quite a burly ...







Edit: and I don't like straight tubes that much :-)
 
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norbar

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
If only they didnt label a bb pivot fully as a 4x bike... I like it though. There are build photos of it on dh-zone.com. It will use some kind of a custom bos fork set at 130mm. Hot.
 
Sandwich

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,995
borcester rhymes
xcuse the digression, but link to info? If that were cheap I'd consider it. I'm missing my arrow ds3 as a single speed "everything shy of competitive dh"er.
 
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