Review: Growtac Equal disc brakes

Growtac Equal mechanical disc brake in situ on the front wheel of a bike
Cycle magazine editor Dan Joyce tested out these expensive but very effective mechanical disc brakes from Japanese company Growtac

You may be thinking: I could buy a pair of drop-bar hydraulic disc brakes for that! A set of Shimano 105 or SRAM Rival 1 brakes costs about £550 and includes brake and shift levers, which the Growtac Equals don’t, so it’s a valid point.

Yet these jewel-like callipers are about the same weight as hydraulic ones and the braking performance is equally (pun intended) good.

Mechanical disc brakes don’t have the best reputation, deservedly so for many cheap models. But the ‘mechanical bad, hydraulic good’ idea is simply wrong. I’ve used Avid BB7 mechanical discs for years, mostly the MTN version.

I prefer the firmer lever feel and the fact that the braking force ramps up rapidly; I don’t want more lever movement for more subtly graduated braking.

These Growtac Equals are similar to BB7s in that they’re single-moving-piston callipers with independently adjustable pads. They’re short-pull brakes, like the BB7 Road, so are primarily for drop-bar bikes.

With the right levers, however, you could use them on an XC or trail mountain bike. There’s a lot of scope to adjust the brake leverage at the calliper. You can set them to come on hard.

As well as testing them in North Yorkshire, I used them on a cycling trip in Spain, which involved long and high-speed descents. There was no noticeable brake fade, and a sudden rainstorm only made them noisy rather than ineffective – unlike the rim brakes of a clubmate, which failed to stop him entirely at a downhill roundabout.

Growtac Equal mechanical disc brakes in place on the rear wheel

The Equals have required minimal attention over the three-month test period but did take a while to set up right initially because of the adjustability on offer. They come with two sets of cable outers: normal and compressionless.

The idea is to use normal outer under the bar tape, where there are tighter-radius bends, and compressionless thereafter. You join the two with a metal connector like a ferrule that’s open at both ends. You then wrap electrical tape around the connector, which looks a bit bodged.

I was only able to use (mostly) compressionless outer for the rear brake. For the front, I used ordinary outer throughout because (long story) I was using post-mount callipers on adapters rather than flat-mount callipers. The cable run from fork to calliper was accordingly awkward.

Braking was good nevertheless; it’s the rear brake that benefits more from compressionless outer due to longer distance to the calliper. The Equal comes in various colours, plus a flat-mount option (£339/pair).


Short-pull mechanical disc brakes that are as good, overall, as any drop-bar hydraulics I’ve tried. They’re more than twice the price of Avid BB7 Road brakes and aren’t twice as good – but they are better. There’s more scope to finesse the brake feel, and the callipers are lighter and more compact.

Other options

Paul Klamper (post mount) £515/pair

Paul Klamper (post mount) disc brakes

More expensive and heavier (211g/calliper) but reputedly even more powerful. Available for short-pull, long-pull and Campagnolo levers. Flat-mount options, too.

Avid BB7 Road S £150/pair

Avid Bb7 Road S disc brake

I prefer BB7 MTN callipers with long-pull road levers (e.g. Tektro RL520) but for standard drop-bar levers these still work well. IS/post mount only. 190g/calliper.

First published in Cycle magazine, August/September 2023 issue. All information correct at time of publishing.

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Tech spec

Price: £379/pair.
Weight: 136g/calliper.
Available from: Velo Duo.

Pros & cons

+ Powerful, rub-free braking
+ Lightweight
– Expensive