What torque should chainring bolts?

What torque should chainring bolts?


Component Brand Newton meters
Chainring bolt (steel) Truvativ® 12.1~14 Nm
Chainring bolt (aluminum) Shimano® 5~10 Nm
Truvativ® 8.1~9 Nm
Chainring spider to crank arm Shimano® 50~70 Nm

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.

Do you need to torque bottom bracket?

You’ll need a BB tool for the BB, no torque wrench needed. For the crank arm, just make it hand tight with an allen key/wrench and it’ll be close enough. Proper installation is more critical than torque values, so be sure to follow the instructions.

What should I torque my pedals to?

Typical torque for pedal thread is about 360 inch-pounds. With a foot long wrench, that is about 30 pounds of effort.

Can you reuse chainring bolts?

Chainring bolts made of Steel or Titanium will typically last longer and can be re-used more times than aluminum bolts. If the bolts look good and function smoothly, there is usually no reason to replace them. When reusing bolts, clean them well so there is no grit or other debris that may hinder proper tightening.

Are chainring bolts reverse threaded?

The one chainring bolt for the big and middle ring is right under the crank arm. Normally that bolt is put in reverse from the others so that you can try and slip a Park wrench or something behind it to keep it from turning. Otherwise you might have to grind it off.

Should you grease chainring bolts?

In other words all metal to metal threads should be greased or thread-locked…. this seems to be the rule. Yes, grease the chainring bolts. You could try a very very weak thread lock, but grease is enough.

Can I change chainring without removing the crank?

Changing rings is not that difficult, and in some cases, it’s possible to replace chainrings without removing the crank. That possibility is limited by what ring sizes you’re using, but hey, it’s always nice when you can work smarter not harder. This trick works for most road cranks and some mountain cranks.

Should I grease chain ring bolts?

Be sure to apply a little grease to all surfaces of the chainring bolts (both halves and the threads). That’ll ensure you get them tight and make it easier to get them off the next time you do this job. Also, it help prevent any annoying clicking when pedaling. Don’t overtighten aluminum bolts or they can break.

What’s the torque of a steel chainring bolt?

Generic specs are 5-8 Nm for alloy chainring bolts and 8-12 for steel. You can also loctite them with purple (low strength) threadlocker if you’re having issues with them backing out. I generally don’t put anything on CR bolts.

How much torque does a Shimano bike have?

General – Cantilever Brakes Component Newton meters (Nm) Inch pounds (in lbs) Brake lever – clamp 6-8 53-71 Caliper – mouting bolts 5-7 44-62 Caliper – brake pad/shoe mounting bolts 8-9 71-80 Caliper – cable fixing bolt 6-8 53-71

Can a cross threaded bolt be used with a torque wrench?

Any tool, even a torque wrench, should be used with common sense. A cross-threaded bolt will not properly tighten even with a torque wrench. The mechanic must be aware of the purpose of torque, and what torque and fastener preload are doing to the component joint.

When to use cable ties on chainring bolts?

Better to give the threads a good clean and lightly grease the threads. On my race BMX’s I put cable ties through the chain ring bolts once they are correctly tightened as this prevents them falling out if they come loose.