SRAM Guide RS (B1) Disc Brake

We’ve read the reviews across the web for the SRAM Guide RS (B1) Disc Brake and summarize the results below:

Universal Ranking

PeakScore: 69 (out of 100)
User Rating: 3 stars 
Expert Rating: 4.5 stars

Number of Ratings Reviewed: 26

Pros & Cons

Reasons to buy:

User Reviews

  • Good modulation, which allows you to control your braking precisely.
  • Sensitive brakes for quick stops.
  • Solid braking and reliable.
  • Able to control how much brake you are using during downhill riding.

Expert Reviews

  • The pads are easy to change.
  • The brake levers can integrate with SRAM shifters, enhancing the compatibility.
  • The disc brake is predictable and effective, making it ideal for those who want reliability and certainty.
  • Ideal for single-finger braking due to the shape of the lever.
  • The lever reach adjust has a range for accommodating various riders.
  • Split clamp makes the brake easy to install.

Reasons NOT to buy:

User Reviews

  • The front brake can lock out which is dangerous.
  • Some reports of the mater cylinder sticking and the calipers getting stuck, meaning the braking mechanism no longer works.
  • Tendency to lose modulation on rides in hot weather.

Expert Reviews

  • Not the most powerful brake.
  • The lever is too close to the bar for two-finger braking.
  • Too heavy for a competitive XC race bike.


The SRAM Guide RS (B1) Disc Brake has multiple reports of some of the parts not working effectively, or breaking after minimal use, hindering the reliability of this product. The bottom line, when the brake works well, it is great, but the lack of consistency makes this a poor option.


Note: User and expert rankings were reviewed across the web. Some expert reviews include these: 1, 2, 3.