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Questions and answers about sports

Do I need new chainring bolts?

5 min read

Asked by: Raul Seawell

Replace the Chainring Bolts: – If any corrosion or rust or other malady is visible. – If the nut and bolt feel gritty when you are tightening them together. – If the chainring bolts appear to be too short or too long for the application.

Are all chainring bolts the same?

Each chainring bolt – the number will vary depending on the chainset design, but is usually four or five – consists of two parts, a female-threaded ‘outer’ part and a matching male ‘inner’. The outer nut has a standard external diameter of 10mm so theoretically the bolts can be used to fit any chainset.

Can I ride with a missing chainring bolt?

As long as you don’t take your bike on a long strenuous ride or torque the snot out of it, you should be OK. Make sure the remaining 4 are properly tightened. Normal commuting should be fine.

Are all chainring bolts the same size?

Single bolts are generally between 3.5 – 5.0mm Long. Double bolts are generally between 5.0 – 6.5mm long. Triple bolts are generally 7.0mm or longer. Triple bolts are normally only used to hold the two outer chainrings as the inner will be smaller and screwed directly to the crank.

Are chainring bolts standard?

Chainring bolts are a standard, one size spec for granny rings, no nuts, the single, double (or u can get longer bolts for single with bashgaurd or double with bash guard). So 4mm nuts and bolts to go with them is proper size.

Should you grease chain ring bolts?

Yes, grease the chainring bolts. You could try a very very weak thread lock, but grease is enough.

How tight should chainring bolts be?

A Shimano “General Operations” manual states the tightening torque for road chainwheels is 12-14 N-m. For mountain bike chainwheels it’s upped to 14-16 N-m for large and middle ring and 16-17 N-m for the smallest ring of a triple.

How do you tighten chainring bolts?


Quote from video: It's called a chain ring nut wrench. So now by holding with the chain ring nut wrench from the other side i can use the torque wrench to tighten or loosen the nut.

How do you remove chainring bolts?

Quote from video: And clamp it on there as tight as you can. And then stick your allen key in just like normal. And it should crack just like that.

What thread are chainring bolts?

75mm thread. As a rule, a set of chainring bolts designated for use with a single chainring will do the job nicely. Trouble arises when the chainring is thinner than it might be and the bolts tighten against themselves instead of clamping the ring to the spider.

How do you measure chainring bolts?

Quote from video: So you get two bolt holes side by side measure from center to center. And you'll find that a four bolt. Bcd or four bolt 104 bcd chain ring measures 73.6 millimeters from hole the hole.

How do I know the size of my chainring?

Quote from video: And you could go around it just count the number of teeth on the chainring. And that's real easy or often the chain rings will have a number stamped on theirs this is 53.

Do you need Loctite on chainring bolts?

Chainring bolts don’t need much torque and they rarely come loose (i’m inclined to say never). Loctite will just make removal more difficult, and generous coat of grease will prevent corrosion just fine in practice.

Should I use grease on bolts?

Mechanics often use grease on bolt threads to protect the threads inside a component while also preventing bolts from seizing to the component. While both of these things are important, you have to keep in mind that a greased bolt takes less torque to apply a given amount of clamping force.

Should I grease crank bolts?

Quote from video: Похожие запросы

What thread are chainring bolts?

75mm thread. As a rule, a set of chainring bolts designated for use with a single chainring will do the job nicely. Trouble arises when the chainring is thinner than it might be and the bolts tighten against themselves instead of clamping the ring to the spider.

Are chainrings universal?

Are they interchangeable? Largely speaking, yes. As long as your attempting to replace them with a chainring(s) designed to work with your chainset. Your cranks will have a specific bolt layout or fitment spec so you can’t just fit a BMX chainring to your triathlon bike.

How are chainring bolts measured?

Quote from video: So you get two bolt holes side by side measure from center to center. And you'll find that a four bolt. Bcd or four bolt 104 bcd chain ring measures 73.6 millimeters from hole the hole. And on the

How do you fit chainring bolts?

Quote from video: Put one of the chain ring bolts in doing it up by hand. Then do the same with the opposing bolt. And then the remainder.

When should I replace my bike chain ring?

Quote from video: Start to become hooked. Like little shark's teeth. And that is a surefire sign that you need to replace the chain rings.

Do you need a chainring nut wrench?

Some high-end cranksets allow you to remove the chainring bolts with only a hex or torx key, but if your chainset uses traditional bolts, you’ll need either a chainring nut wrench tool to sit in the slotted recess of the chainring nut or another hex key (often 1mm larger than the front) to hold in the rear nut and