Is the spike valve really regressive? Regressive basically means that it takes less force to keep the valve open as it does to open it in the first place. Use a microprocessor and 3 or 4 sensors to which the size has been shrinking. Even an accelerometer on the fork can tell whats going to happen to the rear wheel. The air can was always serviceable. I would hope they are staffing up in this area.
This is all race car spec stuff using inertia valving probably a Rich Thorwaldsen design. Top of the knowledge curve stuff. This is not race care spec stuff. This is marketing garbage. No offroad race vehicle anywhere in any class of any series uses a design as stupid as this. No engineer or physicist would think of this as a reasonable idea.
Specialized simply puts nonsensical items on to sell bicycles. I have one. I threw it away after about 5 rides. Physics dictates that it CANT work the way they want it to.
I see what you mean with regards to the rotational direction of the two links. She won Aussie nationals, but no World Cups.
Better solution. This is a precision product. Do this: Go to a Porsche Cayman and access the engine. This is nowhere near the complexity of an integrated and mature automotive product. Much ado about the straight route through the yoke to avoid a bend, now the very same bend is moved at the Brain unit. The picture above is unforgiving! It featured an 'inertia valve' that effectively allowed the shock to be active over rough terrain, yet diverts to a neutral 'lock' feeling over smooth terrain.
The Inertia valve consisted of a spring backed brass weight, that closes off the valve, subsequently blocking oil flow and preventing small vibrations from activating the shock. On the flipside, when a hard bump is received, the valve unseats and opens, allowing the shock to operate 'open' and freely. More modern versions of the Brain system have incorporated further adjustability that would allow the rider to tune in or out the desired degree of 'bump threshold', effectively allowing the user to control how big of a hit is required to 'open' the shock's valving.
The result? For casual trail rides on the rocky and technical trails around the Bicycling office, I almost exclusively used the softest of the six settings. For smoother trails or riding harder, I would shift one or two clicks toward firm.
The bike is so efficient that I was able to do long, mixed-surface endurance rides and even interval training on asphalt, all while using the same suspension settings. I never felt like I was losing a lot of power doing high-intensity efforts, and could transition between pavement and singletrack without skipping a beat.
However, riding at low speed on technical trails in firm settings did bring back some of the knock Brain was known for. I did. The answer, according to Specialized, came down to a combination of weight and performance.
Batteries are heavy. When making this decision, we have to look at all aspects performance, weight, packaging, cost, etc. The longer, lower, and slacker geometry was predictable, especially given the most recent update to the Epic hardtail. Specialized extended the reach proportionally across the entire range of sizes. The XS is 5 millimeters longer, and my XL test bike is stretched out by 20mm.
The bottom bracket dropped 9mm, which took a few rides to get accustomed to. With a little attention paid to one of the fundamentals of mountain bike riding—pedal placement and ratcheting—pedal strikes stopped being an issue. Head angle was relaxed to The seat angle kicks up to The mm chainstays are 5 millimeters shorter than the previous Epic, and Specialized claims the rear triangle is 20 grams lighter and 15 percent stiffer, as well.
The sensation of efficient power transfer is unmistakable, especially when standing up out of the saddle. In yet another example of how the S-Works Epic is aimed exclusively at the high-performance crowd, the carbon XX1 crankset is outfitted with a Quarq power meter.
The bike rolls on the new, insanely light Roval Control SL wheels. At 1, grams for the set, these things are silly light and felt wicked fast and lively underneath me. The rims have an internal width of 29mm, with a 4mm-wide flat section on top of the edge of the rim intended to help prevent pinch flats.
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