Shimano Deore XT BB-M730 70-T NOS Vintage 122.5 mm Bottom Bracket Axle

Shimano Deore XT BB-M730 70-T NOS Vintage 122.5 mm Bottom Bracket AxleOriginal part in production from the 1980s to the 1990s New old stock! Still unused after all these years Worldwide shipping Shimano Deore XT bottom bracket axle (or BB spindle if you prefer), hailing from Japan and in production from the 1980s to the 1990s (yet still new & unused after all this time). Made from steel and weighing in at 177 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

✓ Original part - in production from the 1980s to the 1990s
✓ New old stock! Still unused after all these years
✓ Worldwide shipping

Shimano Deore XT bottom bracket axle (or BB spindle if you prefer), hailing from Japan and in production from the 1980s to the 1990s (yet still new & unused after all this time). Made from steel and weighing in at 177 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

OVERVIEW

Race Condition - New Old Stock*
Production Era - 1980s & 1990s
Country - Japanese
Material - Steel
Weight - 177 g
Stock Code - D-G3-BB-AS24V

*New old stock items may have marks from storage over the years, and as we often have multiples they can vary from piece to piece, but they are always genuine new & unused items.

TECHNICAL INFO

Axle Type - Square Taper
Axle Markings - 70-T (D-5NL)
Axle Length (D) - 122.5 mm
Axle Centre (B) - 53 mm
Axle Drive Side (C) - 37 mm
Axle Non-Drive Side (A) - 34.5 mm
Shell Width - 70 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.

▼SAFETY & COMPLIANCE

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This product complies with the EU General Product Safety Regulation (GPSR). Professional installation and regular inspections are recommended. Due to the product's age, extra care should be taken during use.

Product Manufacturer - Shimano Inc. 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

EU Authorised Representative - Global Trade Department NI Ltd, Office 834, Unit 6, 100 Lisburn Road, Belfast BT9 6AG, Northern Ireland

▼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.