If you’re upgrading your wheels or tires, you might be asking: what is the max rim width for Shimano 105 rim brakes? Getting this wrong could mean poor braking performance or even unsafe riding, so let’s break it down clearly.
The Maximum Rim Width Shimano 105 Rim Brakes Can Handle
The Shimano 105 series rim brakes, like the BR-R7000 and earlier models, are designed to work best with rims up to about 28 mm external width. In practice, they’re most commonly paired with rims in the 19–25 mm range (internal widths of 15–19 mm). Wider rims may cause clearance issues, making it harder for the brake pads to align correctly or for the wheel to spin freely.
Why Rim Width Matters
Using a rim that’s too wide for your brake calipers can lead to problems:
- Poor braking performance – Pads may not contact the braking surface evenly.
- Clearance issues – The wheel might rub against the brake arms.
- Unsafe setup – In extreme cases, the brakes may not close properly on the rim.
That’s why it’s important to stay within Shimano’s intended rim width range for 105 brakes.
Best Wheel Choices for Shimano 105 Rim Brakes
If you’re shopping for new wheels, look for models specifically designed with rim brake compatibility in mind. Many mid-depth alloy and carbon wheelsets are engineered to fall within Shimano’s safe width range, giving you the balance of aerodynamics and braking power without clearance problems.
FAQs
1. Can I run 30 mm rims with Shimano 105 rim brakes?
No, 30 mm external rims usually exceed the safe clearance for Shimano 105 rim brakes. Stick to rims under 28 mm for reliable performance.
2. What tire sizes work best with 105 rim brakes?
Most riders use 23 mm to 28 mm tires, which pair well with rims in the 19–25 mm external width range.
3. Should I upgrade to disc brakes for wider rims?
If you want to use rims wider than 28 mm or run high-volume tires, disc brakes are a better option. They remove rim width limitations and offer stronger, more consistent braking.
