Some components will wear faster when pulling a trailer, but the key question is "how much faster?"

Brakes

As you already pointed out, the brake pad and disk wear rate will be the most noticeable change

Tyres

Everytime your brake pad wear rate goes up you can count on tyres' wear rate going up too. Trailer has no brakes, so all braking forces will go through your brakes and tyre-to-surface contact. Expect to wear through tyres quicker (especially rear)

Drivetrain

Depending on how you ride when you pull the trailer, you may be putting more strain on our drivetrain and it could increase the wear rate

Frame

I would not expect any considerable increase in wear / fatigue to a steel frame as long as trailer hitch is well designed and properly attached.

Wheel and bb bearings

Pulling a trailer should not increase wear of bearings by noticeable amount

Some components will wear faster when pulling a trailer, but the key question is "how much faster?"

Brakes

As you already pointed out, the brake pad and disk wear rate will be the most noticeable change

Tyres

Everytime your brake pad wear rate goes up you can count on tyres' wear rate going up too. Trailer has no brakes, so all braking forces will go through your brakes and tyre-to-surface contact. Expect to wear through tyres quicker (especially rear)

Drivetrain

Depending on how you ride when you pull the trailer, you may be putting more or less strain on your drivetrain and it could increase the wear rate

Frame

I would not expect any considerable increase in wear / fatigue to a steel frame as long as trailer hitch is well designed and properly attached.

Wheel and bb bearings

Pulling a trailer should not increase wear of bearings by noticeable amount

Some components will wear faster when pulling a trailer, but the key question is "how much faster?"

Brakes

As you already pointed out, the brake pad and disk wear rate will be the most noticeable change

Tyres

Everytime your brake pad wear rate goes up you can count on tyres' wear rate going up too. Trailer has no brakes, so all braking forces will go through your brakes and tyre-to-surface contact. Expect to wear through tyres quicker (especially rear)

Drivetrain

Depending on how you ride when you pull the trailer, you may be putting more strain on our drivetrain and it could increase the wear rate

Frame

I would not expect any considerable increase in wear / fatigue to a steel frame

Some components will wear faster when pulling a trailer, but the key question is "how much faster?"

Brakes

As you already pointed out, the brake pad and disk wear rate will be the most noticeable change

Tyres

Everytime your brake pad wear rate goes up you can count on tyres' wear rate going up too. Trailer has no brakes, so all braking forces will go through your brakes and tyre-to-surface contact. Expect to wear through tyres quicker (especially rear)

Drivetrain

Depending on how you ride when you pull the trailer, you may be putting more strain on our drivetrain and it could increase the wear rate

Frame

I would not expect any considerable increase in wear / fatigue to a steel frame as long as trailer hitch is well designed and properly attached.

Wheel and bb bearings

Pulling a trailer should not increase wear of bearings by noticeable amount