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Westwood rim : ウィキペディア英語版
Westwood rim

The Westwood rim style of cycle rim used on bicycles was one of the original steel rim designs, developed during or before 1891 by Frederick Westwood of Birmingham.〔(【引用サイトリンク】 Westwood Wheel Co )〕 Bowden brakes and cables designed for use with this rim were introduced in 1896.〔(【引用サイトリンク】 Bowden Cable )〕 Westwood rims have also been found ideal for use with drum brakes. They were last used on the roadster cycles found in Britain up to the 1960s and still common in South and East Asia and Africa and becoming common once again in Europe. Westwood rims have rounded sides, so they are not suitable for use with caliper brakes.〔(【引用サイトリンク】 Sheldon Brown's Glossary: Westwood rim )〕 Westwood rims features a wide single-wall cross section, the inside circumference of the rim has a contoured section shape to aid with strength. Today Westwood profile rims found in the West are mostly used in drum brake system roadsters and, to a lesser degree, in bicycles with coaster brake systems.
==Variations and sizes==

Raleigh Bicycle Company developed a variation that combined the rod braking surfaces of Westwood rims with flat sides for caliper braking. It has been called "Raleigh Pattern" and "Westrick". They are noted for their strength, and there is also a Schwinn Bicycle Company copy of this design.〔
Westwood profile rims are most commonly seen in sizes 635 mm (28 x 1 ½ in), also marked 700 B,〔

but they are made in most of the middleweight sizes of:
* 590 mm (650 A) – (26 x 1 ⅜ in)
* 584 mm (650 B) – (26 x 1 ½ in)
* 540 mm (600 A) – (24 x 1 ⅜ in)
* 507 mm (24 x 1.75 in)
* 406 mm (20 x 1.75 in)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Westwood rim」の詳細全文を読む



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