How to break in new tires?

Why is it important to break in new tires?

A tire is a composite. In other words, it is a combination of different materials, some being vulcanized rubber compound, other Nylon or aramid fabrics. When you take it out of its package, it has never yet been inflated, it has never yet stretched to take on its operational shape. It therefore needs to 'work' to reach its final shape.

If it's a Tubeless Ready tire, breaking it in will help it adapt to the sealant you're going to use, as each one is different. It will also depend on the local temperatures.

Breaking in new tires is an important step, regardless their type, if you want to get the most out of them later on. Once broken in, the tires will give you a better riding experience.

How long should you break in new tires?

Breaking in new tires is more a question of kilometers driven than duration. A break-in is considered sufficient when you've driven around 50 km. If you have an odometer, simply refer to this threshold. This distance necessarily implies that the tire will have been sufficiently stressed to be used to its full potential.

But if you don't have such an instrument, don't worry: after a while, changes will be visible to the naked eye on the tire as it begins to be accommodated.

In particular, you can see that the tire has become more homogenous than when it was first unpacked. The tread has become matte. Other areas of the tire, in particular the sidewall, are done later since they do not touch the ground directly. It's a gradual process.

When all the different constitutive parts of the tire have been working, it means that the tire is sufficiently broken in and that you can get the most out of it.

How do you break in a new tire?

Inflate it to the right pressure

- Mount and inflate the tire to the recommended pressure, not the maximum.

- The tire begins to adjust even before the first ride.

- Let it sit for 24 hours at riding pressure to allow the carcass to stretch and stabilize.

Precautions to take when riding a new tire for the first time

For your first ride, choose a flat, preferably dry road and start by making a few short braking manoeuvres to give the tire a chance to work. During this initial preparation, be careful not to brake too hard at first, as this could make the tire perform less well later on.

Don't take big curves straight away at high speed: start to angle in slowly. The idea is to gradually reach the limits of your tire.

Let the white waxes disappear

On some road tires, small white waxes are visible when the tire is unpacked. This is a chemical agent in the tire used to protect it from natural elements.

Do not remove them by rubbing with sandpaper. These waxes will gradually penetrate the tire's tread compound and disappear from the surface. This happens progressively during the break-in period. That's why it's important to run in your tires on dry roads at first. On wet roads, these waxes could cause the tire to slip when braking.

Breaking in Tubeless Ready Tires

When fitting a Tubeless Ready tire, it's important to distribute the liquid by moving the tire and riding on it a little. This is what allows the sealant to fill in the micro-porosities in order to ensure a good seal. (See our article on how to use tire sealant)

It's important to do this breaking-in as soon as possible after fitting so as not to miss this sealing stage. As indicated above, do a short gentle run in on a dry road, a few short braking manoeuvres and a few short bends, that's enough.

As with other types of tire, the breaking-in of a Tubeless Ready tire is complete once the first 50 kilometres have been covered.

Breaking in Two New Tires (Front & Rear)

If you buy and fit new tires at the front and rear, the same precautions apply: a few gentle bends and braking, followed by a breaking-in period of 31 miles or until signs of homogenisation appear on the tread and sidewalls.

Do Stored Tires Need to Be Broken in Again?

There may be times when you need to store your tires for a shorter or longer period. For example, if you go on holiday, or if you only use your bike on holiday. If your tires have been stored correctly (to find out how, read our article on storing tires) and have already been broken in, there's no need to break them in again when you mount them on your bike.