Often asked: What Is The Ansi Standard For 1/8″ Bicycle Chain?

What is a 1/8 bike chain?

1/8 ” (0.125″, 3.18 mm) chain is used on most single-speed bicycles, and bicycles with internal gearing. 3/32″ (0.094″, 2.30 mm) chain is used on derailer equipped bicycles that have more than 3 cogs at the rear. Even somewhat narrower chain, typically.

What is the difference between 1 8 and 3/32 chain?

Bicycle chain comes in two basic widths: 1/8″ chain is used on most single-speed bicycles, and bicycles with internal gearing. 3/32″ chain is used on derailer equipped bicycles that have more than 3 speeds.

What is the ANSI standard for chains and sprockets?

ASME B29. This Standard includes information for Steel Roller Type Conveyor Chains, Attachments and Sprocket Teeth: A series of roller links having steel bushings with rollers to contact the sprocket teeth, alternating with links comprised of sidebars and pins, which articulate in the steel bushings of the roller link.

Are 7 and 8 speed chains the same?

Shimano, SRAM and Campagnolo all use the same chain with 8 speeds. Chain for 7 speeds is a bit wider – 7.3 mm, while a 6 speed one is substantially wider – 7.8 mm. That is why the reverse is not the case and a 7 speed chain and especially a 6 speed one will not work as well on an 8 speed system.

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What is the difference between bicycle chains?

Chains can vary in side plate shape, sizing, and height. Differences can cause variations in shifting performance between brands and models. Additionally, chains will vary in the quality of steel used. Better chains that are more durable and longer lasting tend to have harder rivets.

What does a 3/32 chain mean?

3/32″ chain is used on derailer equipped bicycles that have more than 3 speeds.

Are 11 and 12 speed chains the same?

12-speed chains can operate just fine with 11-speed cassettes. The main exception are Shimano’s new 12-speed HG+ models which are heavily optimized for downshifting and thus come with custom inner plates that don’t mix well with non-Shimano 12-speed components.

Does chain length affect gear ratio?

The size of the chainrings has a subtle effect on all gear ratios. In contrast, riders that can push bigger gears at a lower cadence are more likely to prefer bigger chainrings. However, there is more to the effect of chainring size on the gearing of the bike than simply maximising or minimising roll-out.

How often should I change my bike chain?

The 2,000-Mile Rule. To avoid this accelerated wear of your cassette and chainrings, a general rule of thumb is to replace your bike’s chain every 2,000 miles. Mind you, this is just a starting point. No two chains will wear at exactly the same rate because no two riders treat their chains the same. 4

What is ANSI chain number?

There are 14 sizes of roller chains regulated by ANSI. For easy reference, these are numbered 25, 35, 41, 40, 50, 60, 80, 100, 120, 140, 160, 180, 200, and 240. Some manufacturers include chain numbers 320 and 400 to the list of standardized chains. Number 41 chain is a narrow variation of number 40.

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What is a chain pitch?

Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by two.

What does the chain number mean?

Chain types are identified by number; ie. The digits to the left indicate the pitch of the chain in eighths of an inch. For example, a number 40 chain would have a pitch of four-eighths of an inch, or 1/2″, and would be of the standard dimensions in width, roller diameter, etc.

Will a 9 speed chain fit 8 speed?

9 speed chain on an 8 speed cassette is just fine; it’s the wider 8 speed which won’t fit the sprocket spacing on a 9 speed cassette.

Can I replace a 7 speed freewheel with an 8 speed?

You can change to 8 speed, but a normal rear wheel for roadbikes will not fit directly into the frame because it’s 130 mm wide. Depends on the stiffness of the rear frame if it can be pushed together safely to 130 mm.

Can I use a 9 speed derailleur on a 8 speed?

8 and 9-speed derailleurs have the same rear shift ratio but only when both models are made either by Shimano or SRAM. In consequence, a 9-speed derailleur can work just fine with an 8-speed cassette produced by the same brand. If the bicycle uses index shifting, the shifter will have to be designed for 8 speeds too.

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