Frequently Asked Questions

We accept American Express, Apple Pay, Discover, Google Pay, MasterCard, Visa, and PayPal. 

Do you keep my credit card number?
No. We do not store nor can we see your credit card number. We use a secure credit card processing company to accept and charge your card. The only numbers we see are the last four digits of your card. The numbers are used for order reference only. Your number is secure with us.

Did you know you can receive your order in a little as two days within the U.S.?
If you choose USPS Priority Mail, you will receive your order in as little as two days for about $6. And you get a tracking number. All shipping methods have a tracking number.

Why does the nut not screw in all the way?
We use a nylon insert locknut. It's a nut with a nylon ring inside of one end. The nylon ring is narrower than the diameter of the bolt and will stretch around it when torqued. The side without the nylon ring is threaded onto a bolt first. Once the nut is twisted onto the bolt the nylon works to keep the nut locked in two ways. First, it increases the friction between nut threads and bolt threads by causing the bottom faces of the bolt threads to press more tightly against the top faces of the nut threads. Second, the nylon itself is pressing on the bolt, creating more friction.

Since the nylon bounces back to its original form when removed from a bolt, it can be reused many times.

It may seem that the nut will not twist through but give it a bit more torque and tighten as desired. This system eliminates the need to overtighten the bolt and nut.

Where is K3 Pro Cycling located?
All product is made, packaged and shipped from Portland, Oregon USA.

What if I have a question?
Contact us at We will reply as soon as possible.