How to Measure Your Bike for Pitlocks

How to measure for the Wheel Skewers

Remove your wheel (the image below shows the wheel attached to make it clearer)
Measure the distance between the outside clamping surfaces of the dropouts
Repeat the process for the other wheel; the front is generally narrower than the rear

We stock a range of skewers to fit any bicycle regardless of how wide or narrow your dropouts are. When adding a Pitlock set to your shopping cart, you will be asked to select from a range of skewer lengths.

How to measure for the Ahead Lock

Remove your existing top cap by unscrewing the allen head bolt in the center.
You should see something like in the image below
Measure either the inside diameter of the stem (shown in green), or outside diameter of the steerer (shown in red)

You should get a measurement of either 1", 1-1/8" or 1-1/4". Older bicycles are likely to sport a 1" steerer. The modern standard size is 1-1/8". Some newer mountain bikes will have a 1-1/4" steerer.

When adding a Pitlock set that includes the Ahead Lock to your shopping cart, you will be asked to specify the diameter of your steerer and the color (black or silver) of the top cap you would like.

How to measure for the Seatpost skewer/clamp

There are a couple of things to check with respect to the seatpost.

1. Is your current seatpost clamp/collar suitable for the Pitlock seatpost skewer?

If your existing clamp/collar has nice, flat , relatively parallel clamping surfaces on both sides that the Pitlock skewer can clamp onto, and the hole is at least 5mm in diameter then you'll only need the Pitlock skewer includes with the sets. Make sure that you measure the distance between the clamping faces to ensure that you order a long enough seatpost skewer.
If your existing clamp/collar has an integrated quick-release or uses a proprietary bolt such that you don't have two nice, flat, parallel clamping surfaces, or the hole is less than 5mm in diameter, you'll need both the seatpost skewer and a Pitlock seatpost clamp/collar.

NOTE: The standard length Pitlock seatpost skewer will fit all sizes of Pitlock seatpost clamp/collar.

How to measure the length of a Pitlock skewer

Be sure to keep in mind that the Pitlock skewer needs to be approximately 10mm longer than the installation width to accommodate the locking mechanism.

Use these measurement guides for your axles:

Standard Pitlock axles:

Type	Minimum installation width	Maximum installation width	Length of entire axle
VA 119	104 mm	119 mm	129 mm
HA 155	140 mm	155 mm	169 mm
SA/LA 33	18 mm	33 mm	43 mm
SA/LA 23	8 mm	23 mm	33 mm

Longer Pitlock axles:

Type	Minimum installation width	Maximum installation width	Length of entire axle
VA 130	105 mm	130 mm	140 mm
HA 170	155 mm	170 mm	180 mm
SA/LA 45	30 mm	45 mm	55 mm
SA/LA 60	45 mm	60 mm	70 mm

Universal axis 240:

Minimum installation width	Maximum installation width	Length of entire axle
10 mm	240 mm	Continuous axle thread