What is the torque needed for chainring bolts?
4 min read
Asked by: Michele Taylor
Got Torque ?
| Bottom Bracket | ||
|---|---|---|
| Bottom bracket cups | 300-360 lb/in (32.9-40.7 Nm) | |
| with a single 6 or 8mm bolt on each arm | 350-435 lb/in (39.5- 49.2 Nm) | |
| Chainring bolts | steel | 106-124 lb/in (12-14 Nm) |
| Chainring bolts | aluminum | 71-79 lb/in (8-9 Nm) |
What torque should chainring bolts?
Chainrings
| 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 |
What is the torque for SRAM chainring bolts?
Written on the back of the chain ring you will find the torque spec for the chain ring bolts; 8-9 N*m or 71-80 in-lbs.
How do you tighten chainring bolts?
Quote from video: Sometimes you can torque these chainring bolts by just holding the crank. And then pushing and turning the torque wrench but other times when you go to try to torque these bolts the whole bolt turns.
Should I use 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 you grease chainring bolts?
Yes, grease the chainring bolts. You could try a very very weak thread lock, but grease is enough.
What is the torque spec?
By definition, torque refers to the amount of rotational force at the point of application. When attaching a wheel to a vehicle, torque specifications are the amount of force recommended on the hardware to ensure proper installation.
How do you install 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.
How do you tighten Shimano 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.
Are chainring bolts universal?
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.
Why does my bike clunk when I pedal?
Wheel Noises Only When Pedaling
Noises once-per-wheel-revolution that only occur when you are pedaling are most often related to the freewheel or Freehub. The freewheel or Freehub bearings may be loose, or the cassette may be loose on the Freehub body. See if you can wiggle the sprockets back and forth.
Why is my bike creaking when I pedal?
The most common cause of creaking is the crank being loose on the spindle. Remove the crank bolts, lubricate the threads and under the bolt head, and reinstall. Tighten the bolts to the manufacturer recommended torque. Use a torque wrench if possible.
How are chainring bolts measured?
Chainring bolts are generally measured either between the two raised heads or just the inner shoulder of the female threaded part (nut). One aspect that is often overlooked is that many chainrings have recessed bolt holes, the depth of the recess should also be taken into consideration.
Should I grease crank spindle?
With or without lubricant, in use, cranks will make metal-to-metal contact with the spindle, causing fretting erosion of the steel spindle for all but the lightest riders. Lubricating the spindle for assembly assures a predictable press fit for a given torque.
Does thread need lock?
Do I Need Threadlocker? By far, the best reason to use a threadlocker solution is to prevent the accidental back off of fastener assemblies due to vibration. While not necessary in all applications, solutions can also be used any time a nut and bolt are placed together.
Should I grease crank bearings?
It is likely, unless your bicycle is quite old, that it has sealed bearings in the crankset, so there is no real need to grease them yourself.
How do you tighten Shimano 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.
Are chainring bolts universal?
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.
What size are chain ring bolts?
One aspect that is often overlooked is that many chainrings have recessed bolt holes, the depth of the recess should also be taken into consideration. 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.
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.