Formula RX hydraulic disc brake review

Power and control

Our rating 
3.0 out of 5 star rating 3.0
GBP £186.80 RRP | USD $295.00
Formula RX hydraulic disc brake

Our review

Loads of mid-weight control and power, but extras make it expensive
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Formula’s RX brake is an increasingly common original equipment fit, but its modulation and control make it well worth upgrading to, particularly if you already have rotors and mounts to offset accessory costs.


Overall design is unsurprisingly similar to the rest of the Formula family, with an organic looking body and deeply crooked lever that bring it in just under 400g. There’s no bite point adjust cylinder and the blade reach uses a recessed Allen key rather than a thumbwheel. This means there’s less to come loose, rattle or otherwise go belly up in long-term use, and all the RXs we’ve run for a while have been rock solid.

Resin pads don’t last as long as the sintered ones on more expensive Formulas in the wet but they’re still okay. Modulation and overall lever feel is excellent too, with a softly progressive stroke building to impressive power even with one finger.


Our only real gripe is the price of the bog standard rotor (£39.95), mount (£17.95) and bolts (£3.95) which make an otherwise reasonably priced (£124.95) brake very expensive – but if you’ve already got those bits, that’s not an issue.

Product Specifications


Name RX Brake (with rotors) (12)
Brand Formula

Description Average Torque 107Nm
Weight (g) 398
Brake Rotor Diameters 160mm 180mm 200mm