3TTT Attaco Criterium Vintage 100 mm 1" Quill Stem

3TTT Attaco Criterium Vintage 100 mm 1" Quill StemOriginal part produced in the 1980s Lightweight for the era just 286 grams Suitable for historic cycling events such as L'Eroica Checked & cleaned Worldwide shipping 3TTT Attaco Criterium stem, hailing from Italy and in production during the 1980s. Made from aluminium and weighing in at 286 grams pretty lightweight for a stem at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too. If

✓ Original part - produced in the 1980s
✓ Lightweight for the era - just 286 grams
✓ Suitable for historic cycling events such as L'Eroica
✓ Checked & cleaned
✓ Worldwide shipping

3TTT Attaco Criterium stem, hailing from Italy and in production during the 1980s. Made from aluminium and weighing in at 286 grams - pretty lightweight for a stem at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong stem!

The stem's been carefully cleaned, thoroughly checked and graded as very 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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Condition - Very Good
Production Era - 1980s
Country - Italian
Material - Aluminium
Weight - 286 g
Stock Code - U-ST158V

TECHNICAL INFO

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Extension Length (ctc)* - 100 mm
Quill Size - 1"
Steerer Size (ID) - 22.2 mm (Standard)
Total Shaft Height - 135 mm
Clamp Size - 25.8 mm

*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.

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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)* - we measure from the centre of the handlebar clamp to the centre of the shaft, to the point where the stem bolt passes through, to the nearest 5 mm. We always take this measurement in a straight line through middle of the extension, not along the top. In some cases the stem may be stamped with a different extension length as some manufacturers measured differently, but we always use our own measurement for consitency.

Quill Size - the most common size for classic and vintage road bikes is 1", this should be the same as the outside diameter of your fork's steerer column. Oversized steerers found on mountain bikes and later road bikes will be either 1 1/8" or 1 1/4".

Steerer Size (ID) - this is the most important measurement when checking the stem fits your bike. This should match the measurement of the inside of your fork's steerer column, where the stem will be inserted. The standard size for road quill stems was 22.2 mm, or 22.0 mm in France until the 1980s.

Total Shaft Height - measured from the top where the expander bolt head sits, to the bottom of the stem's shaft. To give you an idea of how high the stem can be set, there should be an absolute minimum of 50 mm inserted into the fork steerer, although most stems come with a 'minimum insertion line' to help with this.

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.