Shimano Dura-Ace GB-100 1st Gen 68-W-112 c.1972 Vintage 112 mm Bottom Bracket Axle

Shimano Dura-Ace GB-100 1st Gen 68-W-112 c.1972 Vintage 112 mm Bottom Bracket AxleOriginal part produced in the 1970s Professionally checked & cleaned Worldwide shipping Shimano Dura Ace bottom bracket axle (or BB spindle if you prefer), hailing from Japan and dating back to 1972. Made from steel and weighing in at 148 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike. The axle has been thoroughly checked, cleaned and graded as good condition, but do take a good look at the

✓ Original part - produced in the 1970s
✓ Professionally checked & cleaned
✓ Worldwide shipping

Shimano Dura-Ace bottom bracket axle (or BB spindle if you prefer), hailing from Japan and dating back to 1972. Made from steel and weighing in at 148 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

The axle has been thoroughly checked, cleaned and graded as good condition, but do take a good look at the detailed photos so you can see the cosmetic condition before you buy.

OVERVIEW

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Race Condition - Good
Production Era - 1970s
Country - Japanese
Material - Steel
Weight - 148 g
Stock Code - U-BB-AS11V

TECHNICAL INFO

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Axle Type - Square Taper
Axle Markings - 68-W-112
Axle Length (D) - 112 mm
Axle Centre (B) - 56 mm
Axle Drive Side (C) - 29 mm
Axle Non-Drive Side (A) - 27 mm
Shell Width - 68 mm

NB: Check the help section to see how we take these measurements.

▼SHIPPING, TAXES & RETURNS

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We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

EU Customers – for orders under €150 (excluding shipping), VAT will be collected at checkout, but from 1st July 2026, due to new EU import regulations, there may also be a customs duty payable to the carrier. For orders over €150, all import fees will be payable to the carrier, with nothing collected at checkout.

USA Customers – import fees are now collected at checkout for all orders to the US, so there won’t be any surprise charges when your order arrives.

Other International Customers – local import fees may still apply, charged by your customs office or courier before delivery. These are not collected by us, so please check your local rates before purchasing.

Any applicable fees will appear at checkout.

▼HELP SECTION

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We've provided reference below to illustrate how we take the measurements.

Axle Type - for square tapers, the ISO introduced a standard for European makers in the early 90s, JIS then did the same in Asia. Before then it was not so simple, and although there is a degree of interchangeability, the best way to make sure you have the right axle is to stick to the same brand from the same era, ideally the proprietary model.

Axle Length (D) - your crankset dictates the axle length you need and the recommendation should be used to avoid issues with chainline. If you're replacing an axle that works perfectly then this can be matched, otherwise you'll need to check the manufacturers spec, a good resource for older bikes is Velobase.

Centre (B) - measured from the outside of the 'shoulders' of the bearing races, as seen in the diagram.

Drive Side (C) - the right side (with any logos etc on the axle facing you), your right crank and chainrings will mount to this side.

Non-Drive Side (A) - the left side, where the left crank arm will be mounted.

Shell Width - the width of the bottom bracket shell the axle was designed to fit, measured at its widest point.