High Strength Lightweight
Check out this page if you are looking for High Strength Lightweight
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 Sunrise Medical Inc Breezy EC 4000 High Strength Lightweight Wheelchair 18 x16  US $302.46
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 High Strength Lightweight Swing Away Footrests Wheelchair in Black 18 US $365.72
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 WHEELCHAIR BY CATALYST LIGHT WEIGHT HIGH STRENGTH QUICK RELEASE WHEELS TAG164 US $1,100.00
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 WHEELCHAIR LITESTREAM XF LIGHT WEIGHT HIGH STRENGTH US $1,100.00
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 Comfort High Strength Lightweight Wheelchair US $249.00
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 Viper Plus GT High Strength Lightweight Dual Axle Wheelchair US $729.18
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 DRIVE Polywog High Strength Lightweight Transport Wheelchair 250lb Capacity N R US $150.00
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Why don't we farm spiders for their webs?
Taken from Wickipedia:
Spider silk is a remarkably strong material. Its tensile strength is superior to that of high-grade steel, and as strong as aramid filaments, such as Twaron or Kevlar. Most importantly, spider silk is extremely lightweight: a strand of spider silk long enough to circle the Earth would weigh less than 500 grams (16 oz).[6]
Spider silk is also especially ductile, able to stretch up to 140% of its length without breaking. It can hold its strength below -40 degrees celsius. This gives it a very high toughness (or work to fracture), which "equals that of commercial polyaramid (aromatic nylon) filaments, which themselves are benchmarks of modern polymer fiber technology."
So how come we don't utilise this silk to make ultra light weight bullet proof vests, protective clothing or anything else??
Well, spider silk is indeed used to make things. See below.
The silk of the Nephila spider is the strongest natural fiber known to man.
Uses by humans: Tribal people have long used the webs of these spiders. In the South Pacific, the web silk is used to make fishing lures, traps and nets. In the Solomon Islands, the spider web is collected by winding it around sticks to make large sticky balls which are suspended just above the water. Needle fish are lured to jump out and get entangled in the ball. In Southeast Asia, people make a net by scooping up the web between a stick bent into a loop. Spider webs have been used as bandage to stop blood flow and used to make bird snares.
In modern times, the Golden Orb Web Spider's silk is set to become a major product. The silk is almost as strong as Kevlar, the strongest man-made material which is drawn from concentrated sulphuric acid. In contrast, spider silk is drawn from water. If we could manufacture spider silk, it would have a million uses from parachutes, bullet-proof vests, lightweight clothing, seatbelts, light but strong ropes, as sutures in operations, artificial tendons and ligaments. Studies are now being done to have genetically engineered plants produce fluid polymers which can be processed into silk! Spiders are not used to produce silk fabric because Silkworm Moth caterpillars produce twice as much silk and are easier to manage (for example, they don't eat each other up!!).
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