Hope RX4 road disc caliper review

Hope's aftermarket disc calipers promise to increase braking performance beyond comparison

Hope RX4 road caliper
Cycling Weekly Verdict

It's not often you can purchase an upgrade that makes a genuinely massive difference to the performance of your bike. But with Hope's RX4 disc calipers I can honestly say that you will wonder why you ever put up with sub par braking performance. There really is nothing to fault with the RX4 - it will fit almost every disc brake frame and fork, is more powerful and offers better modulation than any other brake and is almost jewel like in its build quality and looks.

Reasons to buy
  • +

    Phenomenal power

  • +

    Superb lever feel

  • +

    Build quality

  • +


Reasons to avoid
  • -

    Needs to be fitted by a competent and experienced home mechanic or bike shop

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

The Hope RX4 disc brake calipers were selected for an Editor's Choice award in 2020. This year's list contains 78 items which scored a 9 or 10/10 with our tech team - this gear is the best of the best, and has received the Cycling Weekly stamp of approval. 

Hope RX4 disc brake calipers are intended as an aftermarket upgrade to improve braking performance on all all road and gravel bikes that currently use hydraulic disc brakes manufactured by Shimano, SRAM and Campagnolo.

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James Bracey

James Bracey's career has seen him move from geography teacher, to MBR writer, to Cycling Weekly's senior tech writer and video presenter. He possesses an in-depth knowledge of bicycle mechanics, as well as bike fit and coaching qualifications. Bracey enjoys all manner of cycling, from road to gravel and mountain biking.