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Scurra Edit


When Gizmag was poking around at Interbike 2013 earlier this week, we were particularly interested in finding unique products that would catch the eye of even non-cyclists. Well, when we saw Scurra's Hard Enduro mountain bike, we knew we'd hit pay dirt. The bizarre-looking bike forgoes a traditional telescopic suspension fork, and instead uses a linkage combined with a rear shock for its front suspension. The setup allows for seven inches (178 mm) of travel, along with some other claimed benefits.

The pivoting parallelogram linkage system The two identical shocks sit head-to-headThe complete prototypes each weigh around 33 lb For a 29-inch wheel, the system provides seven inches of travel View all Scurra founder/engineer Martin Trebichavsky was quick to point out that the two bikes on display were proof-of-concept prototypes, and that a commercial version of the Hard Enduro would be considerably simpler and lighter ... although at 33 pounds (15 kg), the existing bikes aren't obscenely overweight as it is.

The patented Trelever front suspension utilizes a pivoting parallelogram system, to link the front wheel to a stock DT Swiss M212 rear shock. That shock is located in the middle of the aluminum frame, and sits head-to-head with another identical shock, which handles the rear suspension.

The two identical shocks sit head-to-head Trebichavsky says that in its current form, the Trelever system weighs roughly the same as some suspension forks. It would be good to see it lose at least a bit of that weight, though, as the one bike that we lifted did feel slightly front-heavy.

Martin also told us that along with its seven inches of travel (for a 29-inch wheel), one of Trelever's other selling points is its enhanced front wheel control. It is also said to offer a minimum of suspension response lag, low unsuspended mass, and a very stable yet agile ride.

The best way to verify these claims, of course, is to try out a commercial version of the Hard Enduro for yourself. That probably won't be possible until at least next March, when the bike is scheduled to reach the market. It should be priced at a rather intimidating €9,000 (US$12,000), which will include a transport case.

For another interesting approach to mountain bike front suspensions, take a look at the Lauf leaf-style fork. Edit , ,

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Running shoes Edit Milton, a 'heel/toe' stride is very inefficient for a sprinter. In fact, it actually slows a sprinter down. The exact opposite is true for a distance runner. A distance runners stride will roll from the heel along the outer side of the foot and through the ball of the foot with the stride completing its roll forward just as the heel of the other foot makes ground contact.

Both are runners and yet, the mechanics of sprinters step and a distance runners step are completely different because they are performing completely different tasks. Their shoes are purpose-built.

Rann Xeroxx, as you guessed, your assumptions about the purpose of a runners stride is incorrect, but only because sprinters and distance runners have different goals. Try running a mile entirely on the balls of your feet (a sprinters stride). If your body isn't one big charley horse by then, switch to a distance runners stride - heel contact first with body weight rolling along the outside of the foot culminating with a push with your toes. Yes, a push from your toes. Losing that little push and you'll waste energy you'll wish you had as the finish line looms ahead. Runners are not out on the road to burn calories. Their goal - whether sprinter or distance runner - is to be as energy efficient as possible regardless of their chosen events. Let's go one step further and consider how a stroke affects a persons body. I'll use my own for an example. With one knee fused, I could still out walk all but a few people. My stroke affected my right side, primarily my right leg from the knee down. Total loss of muscle tone and control.

This shoes design could provide the forward momentum needed to complete a step without the characteristic 'hitch' in my giddyup. Yes, extensive physical therapy was needed to regain muscle tone and control. Even this shoe design could not overcome that hitch without the proper foundation of P/T. But, it COULD help and that it has. Think 'Blade Runners'.

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