While I have hit on some technical and design points with my earlier Superfly 100 and Rumblefish reports, there are a few other things we saw and heard at the gathering that are notable. Some have to do with the Superfly single speed model, so let’s dig in!

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Suspension Overhaul: The suspension team at Fisher has really put in a lot of time and effort to transform the old HiFi line into two distinctly different feeling rigs that are essentially based off the same chassis. Not only are the two bikes in question very different feeling, but both are head and shoulders above what the HiFi of old was. Inspired by last years well received Roscoe and its DRCV design shock, Fisher set to re-invent the HiFi’s and create a new trail bike, the Rumblefish, and have done so in a relatively short period of time. You can read more about the specifics of DRCV in the Rumblefish post, but it should be said that the Superfly/Hi Fi shocks are totally re-designed as well. Featuring a Fox RP-23 with Boost Valve technology, Fisher was able to work with Fox to create a Boost Valve setting that would appease the racers, yet still have an acceptable level of small bump compliance. I think they have achieved what they set out to do, and apparently Jeremy Horgan-Kobelski has already made his mind up, choosing the Superfly 100 for all of his racing since he got it about midway through the season. Flatter suspension curves and valving technology aside, the new suspension overhaul has seemed to be an early success for Fisher’s 2010 full suspension 29″ers.

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Frame Overhaul: Not only did the suspension get the once over, but the frame got totally overhauled for 2010 as well. Gone are the seat stay pivots, the two piece seat stays themselves, and the linkage points were moved in two key areas all creating a laterally stiffer, stronger, and better performing bike. Not only that, but Fisher manages to build a 29″er with shorter chain stays than they had before with a reduced wheel base. Here is a closer look at the details of the 2010 frames.

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Net Molded/Co-Molded OCLV Construction: The Superfly 100 is a Waterloo, Wisconsin made frame using the tried but true OCLV carbon construction techniques that have been refined to a very high degree over the years. Notice in the photo above that there are no aluminum parts bonded to the frame to mount the pivot points of the suspension to. This “co-molded” construction technique, is being applied to the Fisher Superfly 100 and results in the lightest full suspension frame ever made by Fisher of any wheel size. The bottom bracket (BB-95), employs the net molding technique, first seen in Trek’s Madone road models and does away with aluminum threaded inserts. Fisher designers are specifically proud of the 44 gram carbon fiber suspension link on the Superfly 100.

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ABP Brake Pivot: Here is one of the biggest improvements in the Superfly 100, HiFi, and Rumblefish bikes for 2010. This was designed to enhance rear braking, which it does well, but for a wagon wheeler, it has a very important side benefit. It rids the seat stays from carrying the pivots. This is a big deal because the seat stay pivots, which are inherently independent of each other, and are also further from the contact patch of the rear wheel, create a longer lever force on the seat stay pivots. This was felt in the Hi Fi’s of 2008/09 as a twisting, flexy feel in the rear triangle of the bike. The ABP moves this pivot lower, in line with the axle, lessening the lever forces, and can utilize the skewer and hub axle as a stiffening agent. This results in an almost through axle stiffness to the Rumblefish, HiFi and Superfly 100 for 2010. Gone is the torsional twist that typified the old HiFi rear end.

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Hydro-formed Downtube, Main Suspension Pivot: I have received a few e-mails about how “ugly” the new Fisher Hi Fi down tube is. Well, beauty is certainly is in the eye of the beholder, but the tube shape serves a very important function. Fisher saw the chance to redesign the Hi Fi and Rumblefish aluminum frames when developing the 2010 bikes and saw that in their FEA work that the “bellied” down tube provided much stiffer and stronger results. Not only that, but at the junction of the down tube and bottom bracket the tube could be shaped to take advantage of the direct mount front derailluer and BB-86 bottom bracket. This provides a bigger weld area and a bigger down tube makes for a less flexy frame.

Not only was the Hydro-formed downtube an intentional design enhancement, but the design also moves the main pivot behind the seat tube, making for an even shorter swing arm assembly, which also tightens up the rear end of the bikes significantly.

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E2 Steer Tube System: Again, originally seen on the Trek Madone road bike, the E2 steer tube design is essentially a 1 1/8th to 1 1/2 tapered steer tube housed in a special head tube as seen in the photo above. What it also does for a 29″er is that it provides for larger diameter tubes to be joined at the head tube to fight torsional flexing loads incurred by the longer forks on 29 inch wheeled bikes. This is felt by a rider as a more precise steering bike that stays on line better than a bike without it. Also, it makes for a better sprinting machine in the case of a race bike like the Superfly 100. 2010 marks the first use of this technology on a Fisher full suspension 29″er.

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The Switchblade Fork Makes An Appearance: The much waited for Bontrager Switchblade fork was in attendance at the Press Camp on the front of Jesse LaLonde’s Superfly single speed rig. Jesse is pretty pumped about how it has been performing and in combination with the carbon Superfly single speed his rig is an astonishing 16lbs of serious race machine. At any rate, the fork will be coming soon, but as of yet, I have no official date. Stay tuned.

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The New Sliding Drop Out Design: In a nod to some small custom builders, Fisher designers took the swinging drop out design idea and modified it to accommodate the carbon fiber Superfly frame. Swinging only on the non-drive side, the drop out also allows for a four tooth change in rear cogs with no reason to break the chain to get your different ratios. You can also use a quick release wheel on this design without fear of slippage. Compact, sano, and easy to use, this drop out design promises to be step above the track ends of last years limited edition Superfly single speed.

Stay tuned for more as the race team members relate their seasons experiences onboard Fisher 29″ers.