IRD
IRD 790 NOS/NIB Classic 9 Speed Chain
£35.00
✓ Original part - produced in the 1990s
✓ New old stock & still in the original packaging!
✓ Worldwide shipping
IRD 790 chain, hailing from the United States and in production during the 1990s (yet still new & unused after all this time!). Made from steel and weighing in at 360 grams. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike.
OVERVIEW
Production Era - 1990s
Country - American
Material - Steel
Weight - 360 g
Stock Code - D-CHN39C
*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
Optimal Speed* - 9 Speed
Shifting System(s) - All Systems (Indexed), Friction (Non-Index)
Outer Width - 6.7 mm
Cog Width - 11/128"
Pitch - 1/2" (Standard)
Number of Links - 116
*See help section.
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▼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.
We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.
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▼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.