This is the product description text that will appear here.
Quantity
1
Description
Maximum power, zero compromise. Engineered for gravity and E bike use, the one-piece GR4 caliper features a stiffer one-piece body, larger pistons (6% more power vs Tech 4 V4), and a slimmer profile for better frame compatibility. They are ...
Reviews
5.0
2 ratings
5
4
3
2
1
The best
Rally Goodyear brakes.
I had a set of tech 3 e4 few yearas ago and this brakes are much better. More powerfull, better lever design, New bleeding port...
Easy to Install and bleed with 3d printed tools.
Not cheap but it worth.
F
Fernando · December 13, 2025
Almost too much power!
These brakes are the strongest I’ve ever used. Almost too much power had to change my riding style to accommodate