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TerrorFirma said:
That's exactly what you need to do... I've owned a URT and to get the thing to work through the complete range of travel you need to be seated, thus putting all your weight on the front triangle. It still has some travel when you're standing, but you do lose a great percentage. You totally feel the bike getting plush as soon as you sit down...but you can't stay like that for long or you'll get bucked! How many DH riders do you know that do the whole course seated? Uh... none and thats why you don't see that design anymore or the sweet spot designs... it's too bad because they totally eliminate chain growth problems, and bio-pacing [pedal induced bob]
This frame would have chain growth and no travel because of the chainstay pivit between rear axel and BB. So basically the frame has no advantages at all :rolleyes:
 
scabrider said:
that is actually a really good design because it uses a bellcrank like a motorcycle but has those other peices to increase lateral rigidity, i think. if done right, a bell crank allows you to both sprint on flat and take big hit without bottoming. the japaneese have figured this out pretty well and without it you wouln't be able to take an mx bike down a flat section of track and have stiff suspention, and he a 30 foot doulble right after and soak up the landing. i think theese peolpe have really thought about " when going through travel, the wheels don't move, but instead the mainframe colapses into them" meaning that the wheel base never changes, but the frame basicly "gets smaller". the proble with the design is the bb, if it had been on the mainframe it would be way better, it would also be better if the bottom pivot went around the bb shell like on a cowan ds...
wow you must pretty bored right now, huh henry...
 
jp3d said:
This frame would have chain growth and no travel because of the chainstay pivit between rear axel and BB. So basically the frame has no advantages at all :rolleyes:
Umm, no...

The frame will have very little chaingrowth, I would guess around 10mm. And yes, it will still have travel, it will just require more force for the shock to activate when you are standing on the pedals.
 
I love watching a random bunch of Internet flamers predict the suspension behavior without riding the bike or even understanding how the linkage works, and then pat each other on the back for being smarter than the engineers who designed the frame.

The BB is very close horizontally to the frame pivot. This means that very little of the rider's weight will affect the suspension, for the same reason a teeter doesn't slam down once you get three inches past the pivot. We went over all this before in the RAM Bikes thread.

Note that Maverick does exactly the same thing: their BB is on a link to the rear axle carrier. Since the Maverick link is much shorter, standing will have a greater effect on the rear suspension than on this bike, especially as the suspension compresses. But I don't see people flaming Maverick for being a URT.

There will be some rider weight effect, but it's not very large -- I'll guess on the order of adding 12-16 pounds to the spring, depending on your weight. This is the tradeoff you get for nearly zero chain growth and pedal feedback. You might not like that tradeoff, but it's a long way from "the suspension doesn't work" or "URT sux0rs".

Yes, "sweet spot" URT designs suck. The GT LTS sucked, too, but that doesn't mean all 4-bar linkages suck.
 
El Caballo said:
Note that Maverick does exactly the same thing: their BB is on a link to the rear axle carrier. Since the Maverick link is much shorter, standing will have a greater effect on the rear suspension than on this bike, especially as the suspension compresses. But I don't see people flaming Maverick for being a URT.
.
I think the reason people don't flame Maverick is because they are such a high quality manufacturer, not because their designs are exceptional.

There are other designs out there with zero pedal feedback/chaingrowth that don't have to compromise bump absorption, so I don't feel that there is a benefit of a floating bb.
 
WheelieMan said:
There are other designs out there with zero pedal feedback/chaingrowth that don't have to compromise bump absorption, so I don't feel that there is a benefit of a floating bb.
I agree with you that there are other, better ways to accomplish that. It just pisses me off when people rag on a design based on bad assumptions.

For instance, here's a Versus Cycles Weapon-X, which has a similar linkage, but uses a concentric pivot around the BB to (nearly) eliminate chain growth.

Image
 
WheelieMan said:
I don't feel that there is a benefit of a floating bb.
there is none now that people better understand the science behind suspension (or at least what works by design). No i dont believe this is crap incarnate, but it's a relic of another time and doesnt have a place among modern technology. I feel it's been proven that BB integrated suspension is completly unessary and has no benefits over moderne sensible design.

So yeah it's pretty stupid :D
 
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