Sakae/Ringyo (SR) Custom-P5 (CT-P5) Laprade Fluted Vintage 27.2 mm Seatpost

Sakae/Ringyo (SR) Custom-P5 (CT-P5) Laprade Fluted Vintage 27.2 mm SeatpostOriginal part produced in the 1980s Suitable for historic cycling events such as L'Eroica Professionally checked & cleaned Worldwide shipping Sakae Ringyo (SR) Custom P5 seatpost (or seat pin if you prefer), hailing from Japan and in production during the 1980s. Made from aluminium steel and weighing in at 289 grams pretty lightweight for seatposts at that time. A fine choice for keeping your vintage bike authentic, but also great for any other

✓ Original part - produced in the 1980s
✓ Suitable for historic cycling events such as L'Eroica
✓ Professionally checked & cleaned
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom-P5 seatpost (or seat pin if you prefer), hailing from Japan and in production during the 1980s. Made from aluminium/steel and weighing in at 289 grams - pretty lightweight for seatposts at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

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 seatpost!

The seat post has been carefully cleaned, thoroughly checked by one of our mechanics 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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Condition - Good
Model ID - CT-P5
Production Era - 1980s
Country - Japanese
Material - Aluminium / Steel
Weight - 289 g
Stock Code - U-SP208V

TECHNICAL INFO

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Seatpost Diameter - 27.2 mm
Length (Centre of Rails to Base) - 195 mm

▼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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Seatpost Diameter - this needs to match the internal diameter of your frame’s seat tube closely, it should be possible to insert the seatpost without force but the fit should be tight enough so it doesn’t just drop in, with no play once inserted. If you have a post that fits the measurement should be stamped somewhere near the bottom, if not you’ll need to measure with a caliper or seatpost sizing tool as the sizes go up in 0.2 mm increments.

Length (Centre of Rails to Base) - measured from where the centre of the saddle rails will sit once installed, all the way to the bottom of the seatpost. Normally there’s a mark to tell you how much of the seatpost needs to be inserted in the frame, however this isn’t always the case so we’d recommend allowing a minimum of 6 cm.