Sedis Sedisport (GT7) Grand Tourisme NOS Vintage 6/7/8 Speed Chain

Sedis Sedisport (GT7) Grand Tourisme NOS Vintage 6/7/8 Speed ChainOriginal part produced in the 1980s New old stock! Still unused after all these years Suitable for historic cycling events such as L'Eroica Worldwide shipping Sedis Sedisport chain, hailing from France and in production during the 1980s (yet still new & unused after all this time). Made from steel and weighing in at 340 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike. If you're taking part in

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sedis Sedisport chain, hailing from France and in production during the 1980s (yet still new & unused after all this time). Made from steel and weighing in at 340 grams. 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, Anjou Velo, Velo Retro or another similar vintage cycling event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong chain!

OVERVIEW

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Condition - New Old Stock*
Model ID - GT7
Production Era - 1980s
Country - French
Material - Steel
Weight - 340 g
Stock Code - D-G1-CHN51V

*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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Optimal Speed* - 7 Speed, 8 Speed, 6 Speed (Narrow)
Shifting System(s) - All Systems (Indexed), Friction (Non-Index)
Outer Width - 7.3 mm
Cog Width - 3/32" (Standard)
Pitch - 1/2" (Standard)
Number of Links - 116

*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.

▼SAFETY & COMPLIANCE

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

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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Optimal Speed - the ideal number of rear cogs, based on the outer width of the chain and the cog width it was designed for. For 6 Speed Shimano Uniglide a 5/6 spd chain will perform best.

Shifting System(s) - indexed shifters 'click' when you change gear. For 9 speed upwards (or Suntour Accushift), to guarantee the best performance we recommend using the dedicated chain. Otherwise, for 8 speed and below, or any speed when using friction shifting (non-index), you just need the correct outer width.

Outer width - measured across the rivets at the widest point, these are the approximate widths for different speed setups (up to 4 speed is also dependent on cog width):

Speed	Outer Width
2 to 4 Speed (1/8”)	8.5 to 9.5 mm
Up to 6 Speed (3/32”)	7.8 to 8.0 mm
7 Speed / ‘Narrow’ 6 Speed	7.3 mm
8 Speed / ‘Narrow’ 7 Speed	7.0 to 7.3 mm
9 Speed	6.5 to 6.7 mm

Cog Width - the gap between the inner plates allows for different rear cog/sprocket widths. 3/32" is the standard for 5 to 8 speed, above that it’s 11/128”. For 4 speed or less, 3/32” and 1/8” were both used, for the latter you will need a 1/8” chain. A wider 3/16" moped chain can be used as a heavy duty opton for single cog setups if required).

Chain pitch - the distance between the rivets/pins. All chains will be 1/2" with two exceptions; 3/16" (“inch pitch”) for very early track bikes, or Shimano's short lived 10 mm pitch system from the 70s/80s.

Number of links - if you're unsure how many you need, measure your old chain (each link has two rivets) or one with a similar setup to yours.