世界上的职业砾石车手（或其中一部分）很喜欢谈论山地车轮胎在几乎所有情况下都比砾石轮胎更快。许多人更是讨论过50mm宽的外胎是否可以适配自己的砾石车，外媒预测，许多砾石车手将几乎肯定选择超出车架最大轮胎间隙的产品。外媒还预测有些人会在实验后回到更窄的轮胎。今年将是购买砾石轮胎的好年头。

Shimano 105 Di2 Hydraulic Disc Brake Dual Control Levers (2×12-speed ... Close enough for government work … Shimano specs 28mm external width and 21mm internal width Shimano GRX Center Lock Disc Brake ...

Before this latest buy, Gabelli bought GRX at 7 other times during the past twelve months, for a total cost of $282,687 at an average of $10.43 per share. Gabelli Healthcare & Wellness Trust is ...