Rob English pedals streamlined bicycle, the Varna II at 50.105 mph average speed for one hour at Nissan Test Track in Arizona April 8, 2007. Harsh 20-25 mph winds buffet him high onto track banking. Video from officials in chase car during last 1min 30sec of his run.

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for MTB & Trekking
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Shimano XTR CS-M970 Cassette 9-speed
The new XTR cassette, with new, three part aluminium carrier and super light weight titanium cogs.
Material: steel, titanium, aluminium
Weight: approx. 224 gram (11-32 teeth)
Nuance of sprocket / Gearing:

11-12-14-16-18-21-24-28-32, Price: £78.69
11-13-15-17-20-23-26-30-34, Price: £86.58

Fitting for derailleur: Shimano 9 speed
From Bike24.com
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Shimano SLX CS-HG80 Cassette 9-speed
The new Shimano SLX cassette with extreme stiffness, superior [...]

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The new top model of Stronglight! X-Wing offers maximum performance in competition with a very futuristic design. With integrated Activ Link titanium axle (TA6V) in the right crank for an excellent ratio of stiffness – dynamics – weight! “In mold” magnet (inside the hollow carbon structure) for pedaling rate computer.
The high-quality, CNC machined aluminium chainrings [...]

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New Magma Carbon MTB crankset with integrated Activ Link stainless steel axle in the right crank for an excellent ratio of stiffness – dynamics – weight! Elastomere inserts for maximum pedaling comfort and less vibrations. Polished casings protect the crank arms at unexpected and hard tail strikes.
The innovative ALS (Adjust Length System) offers the opportunity [...]

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Chris King ISO Disc Front Hub
High precision disc hub for design fans! Months of design and testing went into Chris King’s ISO disc hub. During the development process, they adapted the machines to use larger bar stock when they make the hub shells. This manufacturing improvement allowed to increase the spoke flange diameter significantly. A [...]

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Chris King Classic Front Hub
Ultimate lightweight and high performance precision front hub with multiply sealed bearings. This hub is extremely durable! With only 112g it’s hard to believe that the hub is also the toughest hub out there. Offered with quick-release axles. 5 years warranty from the manufacturer!
Material: Alumninium 2024 T6
Weight: approx. 112 grams
Hole number: [...]

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Racers and enthusiasts are always looking to reduce weight without sacrificing performance. One way we’ve done this is replacing our steel-and-titanium sprocket set with an all-titanium one, now manufactured in the Ultra·Drive profile. Its tooth profile contributes to Records precise and smooth gear changing.
Product Name: Campagnolo Record Cassette UD 10s Titanium
Material: Titanium
Weight: approx. 156 gram (at 11-23 [...]

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The X-SL series are the lightest chains in their class, furthermore, because of the weight reduction the chain has many important benefits such as super fast shifting, smoother action and even a significant reduction of “Chain-Suck”. The open inner plate construction facilitates the removal of dirt from within the drive train.
The hollow pin is riveted [...]

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The Ultegra 10-speed Cassette in different ratios
Product Name: Shimano Ultegra CS-6600 Cassette 10-speed
Weight: approx. 235 gram (at 12-25 teeth)
Nuance of sprocket / Gearing:

11-12-13-14-15-16-17-19-21-23
12-13-14-15-16-17-18-19-21-23
12-13-14-15-16-17-19-21-23-25
12-13-14-15-16-17-19-21-24-27
13-14-15-16-17-18-19-21-23-25
14-15-16-17-18-19-20-21-23-25
15-16-17-18-19-20-21-22-23-25

Price: from £31.16
From Bike24.com

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Mavic cassettes are for use with Mavic Wheelsets only. They are supplied with 9 and 10 speed spacer kits for use with Campagnolo gear systems.
An 8 speed Campagnolo spacer kit is available as an option
It is also possible to buy a Shimano compatible 9-speed spacer kit
The M10 Cassette can be used in several combinations as [...]

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NACA DUCTS & AIR SCOOP
Vacuum moulded ABS. Can be riveted or bonded to body either inside or outside.
NACA 9in long x 1 1/2in deep PRICE £12.00
NACA 6in long x I in deep PRICE £10.00
AIR SCOOP (right) 5 1/2 in long x 2in high PRICE £9.00
NEW CLEAR NACA DUCT
9 [...]

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Product Description
Genuine carbon fibre flat sheet in a variety of sizes from A5 (148mm x 210mm) all the way up to full 2sqm sheets. The sheet is high gloss on one side and performance E-glass fabric on the reverse.
Suggested Uses
The sheet is very tough and suited to a wide range of applications where a gloss [...]

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