What size are bicycle wheel bolts?

Fasteners: Fixing bolts (number and sizes vary). Newer Campy cranks attach at the center to the bottom bracket with a 10mm bolt; modern Shimanos attach to the nondrive side with two 5mm bolts; old-school types use 8mm bolts on both sides.

What size wrench do I need for bike?

You’ll be able to use a 6mm or 8mm hex wrench for most pedals, but a decent pedal wrench is needed for other systems (eg. Speedplay). While a 15mm spanner may work, often you need the narrow profile of a proper pedal wrench. Leverage is key, don’t go for the very cheapest options as they’re often lacking in length.

How do you measure a bike nut?

Place the end of a measuring tape on one of the flat sides of the nut’s outer perimeter. Stretch the tape measure across the nut’s diameter to the flat-side directly across from the one your pulling from. If the nut is metric, count the number of lines on the tape measure to find the measurement.

What size is a bike axle?

At the front, road bike thru-axles are now pretty much standardised at 100mm long by 12mm wide (although some early thru-axle road bikes had 15mm diameter thru-axles). Rear thru-axles usually measure 142mm long and have a 12mm diameter, but you used to be able to find a few bikes with 135mm thru-axles.

Are all bike wheel nuts the same size?

Most modern bikes are M10x1 for the rear and M9x1 for the front. Sometimes better bikes have M10 front axles too.

What size are bicycle screws?

The most common sizes of allen screws for bikes are 4, 5, and 6mm. There’s even a common bike tool that will fit in all three. In my experience, most racks use 5mm screws, but some do use 4 or 6mm screws.

Are all pedals 15mm?

The flats on almost all modern pedals take a 15mm spanner, though many pedal spanners also have a 9/16-inch jaw for older pedals.

Can I use a regular wrench instead of a pedal wrench?

Determine Your Pedal’s Size Since you don’t have a pedal wrench, typically, your standard 15 mm open-end wrench will do the trick just as easily. Once you’ve located the flat wrench spindle next to the bike pedal, it’s time to get to work.

What is Hex bike size?

It’s made up of 4-, 5- and 6mm hex wrenches (the sizes needed for most bike repairs), and the convenient shape provides ample leverage on most bicycle fasteners.

How do you read a nut size?

How to Read Screw Sizes

1. Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread.
2. Read the second number.
3. Read the third number, generally the one following the “x.”

How do you measure lock nut size?

To measure a lock nut simply measure it’s bore and then divide the measurement by 5.

How do I know what size screw I need?

The most important factor in screw selection is length. The general rule of thumb is that the screw should enter at least half the thickness of the bottom material, e.g. 3/4″ into a 2 x 4. The other factor is the screw’s diameter, or gauge. Screws come in gauges 2 through 16.

Is my bike through axle?

Your bike has a thru axle if the “drop out” is a hole, rather than a U-shaped dropout. This provides added security because even if the lever on the end of the thru axle flips open, it is still threaded into the frame, holding your wheel on. If you have a 12mm threaded piece, then you have a thru axle.

Are bicycle axles the same size?

Axle length is not the same as hub length. A bike with a 12×142 hub standard will have a significantly longer axle since it will have to go through the frame on both sides of the 142mm wide hub.

How do I know what size my bike hub is?

Here’s how to measure these distances:

1. Figure out the distance between the lock nuts (where the hub sits in the dropouts) – 100 or 110 mm is typical for the front.
2. Take that number and divide by 2.
3. Then measure from the flange to the lock nut.