South Salem Cycleworks
(503) 480-2001

Vintage Components - Shimano Bottom Brackets

On this page: Dura Ace 7400 English bottom bracket | 600EX English bottom bracket | Deore XT English bottom bracket

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In 1921 Shozaburo Shimano began making one-speed freewheels. Already Japan had a vigorous bicycle industry and despite a temporary shutdown in 1929 caused by the great depression, by 1939 Shimano was making more than a million freewheels a month. From that start, Shimano has now become a multinational manufacturer of not only bicycle components, but also fishing tackle and other sporting goods.

But it is bicycle equipment that drives the company. In 2013 Shimano had sales of 2.6 billion U.S. dollars. And bicycle components were 75% of the firm's business. It is thought that Shimano production constitutes about half of all the world's bicycle component sales.

For the past thirty years, Shimano had striven to stay on the cutting edge of cycling technology and consistently maintains a high standard of quality control.

Shimano Dura Ace 7400 English bottom bracket (68mm spindle w/ cups 1.37 x 24). Used, $75.00

Part# BB-32-01

  • This bottom bracket was produced 1985 - 1992.
  • Cups are stamped "NJS", meaning they have been approved by the Japanese Keirin association.
  • Spindle length is 113mm
  • Cups have O-ring spindle seals.

himano Dura Ace bottom bracket

Square taper, JIS. Shimano says this is pre-1994 Campagnolo compatible.

Shimano Dura-Ace bottom bracket

This is what's included: cups, lock ring and spindle.

Shimano Dura Ace bottom bracket

The bearing surfaces are in wonderful condition. Smoooooth.

Shimano 600EX English bottom bracket. 68mm spindle w/ English threaded cups (1.37 x 24). Used, $70.00

Shimano 600EX bottom brackets were produced in the mid-1980s. The cups have seals that generally keep water from getting into the bearings.

We have three 600EX English bottom brackets: 600EX BB #1 | 600EX BB #2 | 600EX BB #3

600EX English bottom bracket #1: used, $70.00

Part# BB-30-01

Spindle length: 116mm

Shimano 600 EX bottom bracket

All the bearing surfaces are in great condition.

Shimano 600 bottom bracket

The 600EX bottom bracket did not come with a protective sleeve. We've added this Sugino sleeve to further protect the bearings.

600EX English bottom bracket #2. Used, $70.00

Part# BB-30-02

Spindle length: 116mm

Ours is in great condition, with nice smooth bearing surfaces. We have high-quality bearings in stock for this bottom bracket.

Shimano 600 ex bottom bracket

The "VIA" seen on this spindle, and all Shimano parts, stands for "Vehicle Inspection Authority". It certifies compliance with certain Japanese quality standards.

Shimano 600EX bottom bracket

Exploded view showing the smooth bearing surfaces

600EX English bottom bracket #3. Used, $70.00

Part# BB-30-03

English, 68mm spindle with 1.37 x 24 cups

Shimano 600Ex bottom bracket

Bearing surfaces are in wonderful condition.We have high-quality ball bearings in stock, if needed.

Shimano 600 bottom bracket

The cups, showing their seals.

Deore XT English bottom bracket. Used, $50.00

Part# BB-31

  • Shimano part #BB-M730
  • English, 68mm spindle (117.5mm long) with 1.37 x 24 cups
  • Produced in 1987

Deore XT bottom bracket

Note the seals in the cups

Deore XT bottom bracket

Designed for touring or mountain biking

Deore XT bottom bracket

The bearing surfaces are lovely