3TTT Mutant Silver NOS/NIB Classic 140 mm 1" A-Head Stem

3TTT Mutant Silver NOS/NIB Classic 140 mm 1" A-Head StemOriginal part produced in the 1990s New old stock & still in the original packaging! Worldwide shipping 3TTT Mutant ahead handlebar stem, hailing from Italy and in production during the 1990s (yet still new & unused after all this time!). Made from aluminium and weighing in at 259 grams. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike. OVERVIEW Condition New Old Stock In Original Packaging*

✓ Original part - produced in the 1990s
✓ New old stock & still in the original packaging!
✓ Worldwide shipping

3TTT Mutant ahead handlebar stem, hailing from Italy and in production during the 1990s (yet still new & unused after all this time!). Made from aluminium and weighing in at 259 grams. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike.

OVERVIEW

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Condition - New Old Stock - In Original Packaging*
Production Era - 1990s
Country - Italian
Material - Aluminium
Weight - 259 g
Stock Code - D-STA1C

*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

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Extension Length (ctc)* - 140 mm
Steerer Size (OD) - 1" (25.4 mm)
Bar Clamp Size - 25.8 mm / 26.0 mm
Stack Height - 40 mm
Angle - 80 Degrees

*See help section.

▼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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Extension Length (ctc)* - measured from the centre of the handlebar clamp to the centre of the steerer clamp, to the nearest 5 mm. This measurement is taken through the middle of the extension, not along the top or bottom.

Steerer Size (OD) - OD means outside diameter, this is the most important measurement when checking the stem fits your bike. This should match the measurement of the outside of your fork's steerer column, where the stem will be clamped.

Bar Clamp Size - this should match the outside diameter of your handlebars and should be as close as possible to ensure a good and safe fit.

Stack Height - the height of the part that clamps to the forks. This is the minimum amount of space you will need on the fork's steerer column for the stem to fit (minus a few mm as the top of the steerer tube needs to sit just below the top of the stem).

Angle - the angle of the stem's extension in relation to the the fork steerer. Bear in mind the steerer sits at the same angle as the head tube, so a 90 degree stem would not be parallel to the ground. Some manufacturers refer to this as rise or drop, in which case an 80 degree stem would drop 10 degrees from a right angle. Most a-head stems can be flipped although it does depend on the design.