mrky's skateboarding

utorak, 29.08.2006.

i love skateboarding

Evo me opet, malo mi internet štekao pa nisam pisao.
Mal sam se opametio što se tiče pisanja postova, malo ću pisati razgovjetnije.

Kupio nove osovine thunder darrel stanton smokin.
Škola počinje za tjedan dana burninmad sad sam baš burninmad, prekratki su ti naši "praznici", odeš na ljetovanje, vratiš se i odmah škola headbang. Sad meni osmi razred počinje i u pravo sam "odslužio" godinu dana sk8tanja cerekcerek. Baterije mi se pune na fotiću pa će sljedeći post biti slika kiss. Sad sam usavršio flip ono lendam na šarafe i baš sam hepi. Nešt me hvata sk8tanje na veliko cijeli dan se sk8tam dok mi noge ne pootpadaju. Jučer išao do škole se vozat, vozo se tam sam oko 2h pa krenio kući vidio one konje : Likija, Polića i Gavricha ,sjeo kod kuće i nakon 5min opet se sk8tao.
Baš sam sk8 friik.





- 14:09 - Komentari (12) - Isprintaj - #

srijeda, 16.08.2006.

about tensor trucks

Sliders
The pivot cup is fitted in from here. It is molded to the exact shape of the pivot stem, rather than the standard hemispherical design. Its material is several notches softer than the slider, allowing it to flex and mold itself around the irregular movements of the pivot stem. The shape and softness of it helps eliminate speed wobbles and the jittery, unstable vibrations that accompany high speeds, along with providing smoother turns.



The replaceable slider is molded to conform perfectly around the pivot cup; the two fit together as one piece. This incredibly hard, durable polymer is made specifically for sliding and will never crack or compress. It snaps into the bottom of the baseplace from underneath.

Once the slider is snapped inito place and the truck is mounted, the pivot cup is locked and supported just as though it were housed in one solid piece of aluminum.

Nibs

Some tricks naturally try to push your trucks out of alignment every time you land. If one truck barely twists, the board starts pulling to one side. Suddenly, your board feels awkward. This is the reason we got the idea to put nibs on the bottom of the baseplates that bite into the deck. These "teeth" keep your trucks aligned even when your bolts loosen.

Low Theory

We all know what its like to roll an ankle. The higher your ankle is raised off the ground, the more leverage the ground has against it. Once your ankle tweaks past a certain angle, it gets overpowered and rolls.

Your ankle muscles wrestle against a weaker opponent when your heel is closer to the ground. Half the heel height means half the leverage against you. A lower shoe "strengthens" your ankle, allowing it to handle harsher angles before it finally rolls.

Bushing control the hangard's movement like your muscles control the ankle. They handle similar stresses and strains, resisting the hangar from twitching and "rolling". By lowering our hangar's pivot stem, we lowered its "heel". In a sense, we gave Tensors strong "ankles", so the hangar's movements feel controlled through harsher angles and resist wheel bite better.

Our most crucial moments are at the snap of the ollie and the impact of the landing. Small twitches of the hangar at either end caused by "weak angles" get magnified, especially where speed is involved. Those twitches can ruin your snap or send you right to wheel bite. Tensors were designed for stability for these very reasons.

Bushings

The smaller top bushing has much less material to flex. It limits how much the bottom bushing is actually allowed to distort. If it were like the bottom bushing, your trucks would never feel as stable and would easily wheel-bite, regardless of how much you tightended them. Chemically, they're made of short and stiff molecules that interconnect at many more sites. This creates a much more solid cage that won't let itself distory as much as the bottom bushings.

The bottom bushing bears your weight. It takes nearly all the compression and distortion. It's what you "feel" when you ride, thats why it's so much bigger than the top one. We opted for a bouncy urethane that has whats called a high "memory" - it can distort a lot, and then snap right back to its original position. Microscopically, its made up of long, flexible molecules that are loosely bound.

The lip beneath our top bushing fills that space, "connecting" the ring to the kingpin, stabilizing the hangar. It no longer has the freedon to resist your actions with its own reactions, because the lip forces the hangar to remain centered over the kingpin. Instead of funnelling the energy of your movements into doing thats easiest for it to do, it does what you want to do: turn. You haven't fully taken advantage of what your trucks have to offer until they've been ridden with these bushings.

Rounded edges keep them from squashing out of their cups. There is a centered recess to accomodate the lip of the specially developed top bushing, creating an interlocking bushing system and truly unifying the truck's two pieces.

Pivot Stem


Imagine someone put a hangar and bushings in the palm of your hand, and then stomped on it. About half the impact would be cushioned by the bushings, and the other half of the impact might drive that pivot stem right through your hand if it were pointy enough. The point is that the tiny tip of the pivot stem handles huge forces when you skate, and its exact size and shape are much more important than you might think. Two different brands may (and often do) have nearly the same designs, yet the two trucks ride completely different. The tip of the pivot can make an otherwise good truck feel rotten.



Some pivot stems are completely round, and they turn incredible smooth; but they may feel unstable or tend to wheel-bite because you're literally standing on a ball. To combat those problems, other designers completely flatten the tip. This design is stable and probably more prevalent. It can suffer from a more complicated problem because, in effect, they're sticking a square peg into a round hold. A squared tip is forced into the ball-shaped cup until the tip's edges can't go any deeper; all your weight is resting on the edges. As the hangar swivels,the corners bearing your weight skip around and the end result it jitters, especially if you ride loose trucks and skate fast.

Imagine grinding off the round tip bit by bit; say 20 different times, until it was completely flat. The first 10 or even 15 make the truck more stable, but the last 5 times you flatten it actually make the truck feel unstable! At Tensor, we did that exact experiment: we started withcompletely round tips, and gradually tried every shape possible over about 20 sets of trucks until they were too flat. Most truck companies use standard pivot cups that are interchangeable. We created our own, actually using the special pivot we developed in the mold so that the cup completely matches its shape, to give the most stable truck possible.


Kingpins

We are flattered to see that at least 3 other premier, reputable truck companies believe Tensor's kingpin design is better, since they recently adopted it for themselves. Unfortunately, one company did it for a fraction of the cost, because they used the cheaper, weaker Grade 5's (shown here) instead of the stronger Grade 8's. We urge you to check the kingpin's markings, since the one drawback to this design is that it is not replaceable if broken. We would have hoped they copied us completely, without cutting such a crucial corner.

Kingpins are rigorously tested as though lives depend on them, the same way steel bolts used in bridges, planes, cars and skyscrapers are tested. They are stamped with an international symbol (Grade 8 is shown here) designating the requirements mat, which are published worldwide. The steel is tested in a variety of technical ways; the more pertinent results show Grade 8's to be41% stronger (yeild strength A 0.2%) and 22% harder (core hardness) than Grade 5's. But thats only half the story, since numbers don't tell the whole truth.

Using myself as an example, I broke seven Gread 5 kingpins in a period of 2 years. Yet I haven't broken a Grade 8 kingpin in over 2 years. Obviously, Grade 8's are not 700% stronger. It's simply that the Grade 56's were pushed over their limits 7 times, but I never reached the Grade 8 breaking point, which is "only" about 41% higher. The point being that there are perhaps thousands of skaters capable of breaking Grade 5 kingpins, but very few actually land hard enough to snap a Grade 8. In fact, with over 500,000 Tensors sold, we've seen for ourselves that Grade 8 kingpins almost NEVER break.


Digitally mastered

Trucks are usually mass-produced from a template called a "match-plate", which is just a series of 8 or so truck molds. All 8 are clones from a single, one-of-a-kind master pattern that takes months to create; that master truck usually sits in a vault somewhere once the match-plate is operational. Each match-plate creates hundreds of thousands of trucks. The quality of both the master pattern and the match-plate determind the overall precision of the trucks we ride.

Many of the trucks on the market were created from masters that were made by hand, instead of being designed and machined with the aid of computers. Even the slightest bumps or bulges on the pivot, near the bushings or especially along the pivot stem results in trucks that won't go straight, or make your board rock on 2 wheels at a time, like the ones shown here. Sometimes designers change their minds after the match plates are created, forcing them to try to adjust all 8 patterns on the match plate. It's hard to get one right, much less all 8, which is why sometimes customers get good sets, and sometimes-bad sets of trucks.

Tensors were designed and machined with the aid of new computer technology. Every aspect of the geometry and overall workings of the truck were digitally constructed and sculpted. Even during the testing phases when we made alterations by hand, we went back and digitized each change and reformed them in the computer to ensure 100% symmetry. Once we finished the master, we made no changes to the match plates, guaranteeing that they would never be reshaped by human hands, risking imperfections. We did everything we could to ensure that every Tensor sold was perfectly straight, because we understand what even the tiniest imperfection can do to your skating.

Hi Theory

High impacts put most stress right through the middle of the hangar. That is where most bending happens, and naturally most breakage occurs at the thinnest part of the ring, in front of the bushing. Tensor Hi's are specifically reinforced in the outer ring portion that hanges down over the bottom bushing. They also have a thicker "web" sandwiched between the two bushings.

The barrel has been beefed up considerably. Not only does the added thickness around the axle reinforce against breakage, but it also makes for better grinding. The bigger the barrel, the smoother it grinds through rough terrain. It's the same sort of effect when bigger wheels ride smoother than smaller ones because they bridge tiny crevices easier. A fuller, "flatter" barrel grinds smoother and longer than thinner ones.

A thicker barrel means that more layers of aluminum along the axles will have to give before it cracks all the way through. Normally, when the truck absorbs impact forces the stronger steel axles bend more than the aluminum casing will, causing it to crack. Every layer of aluminum is crucial, because for each tiny bit you add onto the axle, you have about 6 times more bracing (2 x Pi) surrounding it.

Any structure is stronger once it its triangulated. Bridges and scaffolding are riddled with cross-bracing that spreads the load across lots of little triangles. The ribs underneath the hangar help minimize some of the flexing in a similar way, while preserving the "breathing" holes neccessary when they make the trucks. Believe it or not, the hangars are consistently stronger when there are holes big enough to get a clear view of the axle. When they pour the hot aluminum into truck molds, the air has to escape quickly, otherwise bubbles form that lead to broken trucks. Beware of trucks that don't "breate".

Lots of truck companies develop good designs for low trucks and then make a higher version for skaters who prefer height, usually to accomodate bigger wheels. They commonly make two adjustments to the hangar's pivot stem, leaving the baseplate almost unchanged. First, they simply lengthen the pivot stem which destabilizes the truck by increasing leverage against the bushings, giving it more of a tendency to fall off-center and into a turn. Second, the pivot isbent even more directly under the axle, taking the load off the stablizing bushings and onto its pointy tip. Both effects explain why these higher trucks are always more squirrelly than the low versions of the "same" truck.



Tensor's primary focus is stability. In order to create a higher truck and preserve stability, we left the pivot stem almost untouched, and raised the baseplate instead. Having your weight tittering on a lower pivot stem is always more stable than on a higher one. The same reasoning explains why low shoes are less likely to roll around your ankle than higher ones. Therefore, we raised the truck from underneath, preserving Tensor's steady ride.

Other differences between the LO and HI include the HI kingpin angle being tilted slightly morevertically; plus the bushing has been raised (relative to the pivot cup), making the hanger sweep a little steeper. Both aspects create a livelier, slightly quicker turn without actually having to combat greater leverage against your ankles. These sensitive angles have been delicately tuned to balance stability with responsiveness.

Axels

Tensors, as well as many modern trucks, are made with NON-slip axles. Lots of trucks still do not have this feature because they're made the old-fashioned way, as shown here. Those companies still pour their aluminum hangars with a rough hole through the barrel, drill them, and then press in the steel axles. In a few short sessions, these axles will start slipping out, the same way they were pressed in. This leaves one wheel pinched, and the other too loose - driving you mad, plus ruining your bearings.

All axles have little ridges, called "knurls", in order to keep them from spinning inside the hangar whne you tighten the sheels. There are a wide variety of knurls, but most modern types use a diamond ("X's"), which keep them from sliding as well as spinning. Old-fashioned knurls had to be straight (bars) to allow the axles to slide through the aluminum hold freely, yet keep the axle from spinning. Tensor uses the deepest, gnarliest knurls available to lock the axle into place, preventing axle slippage.

This is a Tensor "TREE", which is how trucks are mass-produced. Notice the axles are already inthe hangars. When companies advertise NON-slip axles, they mean simply that the axles were placed in the molds, and then they poured the aluminum around them, yeilding what you see here. Although many companies may use this process, the axles may still slip depending on the type of knurls used as well as the softness of the aluminum. Tensor uses the highest quality of aluminum on the market, ensuring maximum hardness to prevent axle slippage and bending. When we advertise NON-slip axles, we mean it.


Angles

The profile of all trucks should show parallel lines cutting across the bottom bushing. These indicate that the angles of the hangar exactly match the angles of the baseplate, which means the 2 pieces fit together. Tensor trucks have been digitally designed and mastered from the ground up, assuring that both the hangar and the baseplate fit together properly. It's striking to realize how many trucks on the market haven't been.

Notice the profile of this popular truck indicates that the angle between the hangar's pivot stem and the bushing ring should have been increased. Once tightened, the outside portion of the bottom bushing hits first, causing "preload". That means the truck rocks slightly before being truly supported by the bushings, giving the rider a natural tendency to over-tighten, just to get rid of that initial instability. Note the bushing wants to squeeze out of the front of the truck.

Once the uneven pressures of poorly matched baseplate and hangar pieces have deformed a bushing, beware of making and truck adjustments. If you take off your hangar, then put it back on, it is unbelievable hard to get the bushings EXACTLY in the same orientation they were; inevitably the hangar will suddenly be tweaked out of alignment, and the board will rock on two wheels. From there turning feels awkward. Even tighening or loosening the trucks can cause a deformed bushing to rotate just enough to cause the same hassles.

- 22:16 - Komentari (3) - Isprintaj - #

srijeda, 09.08.2006.

Wooow!

Ajd napokon da i ja nešt napišeš teme su:
Pannonian Challenge 7
Osovine
Today's day
................................................................................
Pannonian 7

Veliki(najveći) skate kontest u croatia a i šire događa se svake godine u osijeku u parku od 18.8 do 20.8 dolazim 101%
možda i kriger dođe uglavnom dolaze bosanci, srbi i slovenci prašina se sve više diže.

Osovine
Uzimam osovine Thunder Black Darrel Stanton 7.75 low
trebam skupiti još 200 kn smijeh

Today's day
Jee slomio osovinu inače turbo sport osovina kada sam radio flip kriger me slikao s mobom(K750i) sam lendo i kljuk(smijeh) puko još 200 kn i nove dolaze

- 21:56 - Komentari (1) - Isprintaj - #