2.3 mm rotors and 4 pistons: TRP EVO Pro brakes come down from DH to your e-MTB and enduro bike

A long descent, an e-bike weighing over 20 kilos and the feeling that the lever changes halfway down: if that sounds familiar, TRP EVO Pro brakes are made for you. According to MTBpro, which tested them fitted to an Orbea Wild LT, these 4-piston brakes inherit directly what was learnt in downhill racing and focus on power and, above all, consistency.

What TRP EVO Pro brakes bring

The idea is simple: take a brake born for World Cup DH and bring it to the two disciplines that demand most from braking outside racing today, e-MTB and enduro.

• 4-piston caliper: more pad surface pushing on the rotor, more bite with less finger effort.
• 2.3 mm thick rotors: more metal mass to absorb and spread heat, which is usually what makes a brake lose feel on long descents.
• DH origins: a design built to brake hard again and again without the bite point changing.

The source doesn't give price or weight in its summary, so if you're considering them, check the official price list before doing your sums.

Why it matters on an e-MTB or enduro bike

An electric mountain bike adds motor and battery weight, and it also takes you up more often, so you come down more often too. All of that is energy your brakes turn into heat. Enduro is similar: high speeds, rough sections and long braking efforts back to back.

Power is good there, but what really gives you confidence is the brake behaving the same in the first corner as in the last. That's what thick rotors are after: a system that copes with heat without the lever going spongy or losing power.

Before fitting them: what to check on your bike

A brake upgrade at this level isn't just bolting on and riding off. Before you go for it, run through this:

• Rotor and caliper compatibility: a 2.3 mm rotor is thicker than usual; make sure you use the set recommended by the brand and that caliper and pads match it.
• Rotor diameter and adapters: check what size your frame and fork accept and which adapters you need.
• The right pads: on long descents and in mud, choosing the right compound makes a big difference to the feel.
• Bedding in: give them some progressive braking before your first serious descent to bed in pads and rotors.

If you're looking for parts to upgrade your bike or want to sell the brakes you're replacing, the second-hand components section has listings from cyclists like you.

If you're buying a used e-MTB or enduro bike

This kind of test also works as a yardstick. When you look at a used enduro bike or e-bike, the brakes are one of the first things to check: thickness and condition of the rotors, pad wear, lever feel and whether they need bleeding. A good 4-piston brake in good condition adds value; a worn-out one is a cost you need to knock off the price.

The Orbea Wild LT from the test is a good example of the kind of bike that calls for brakes like these; if you're interested in the brand, take a look at the second-hand Orbea listings.

Tempted by an electric mountain bike to ride more descents this autumn? Have a look at the second-hand e-bikes and, once you have one, check the brakes carefully before your first long descent.