gravel pit,screamed

gravel pit
packed gravel laid in the foundation of the road.
a wide gravel unsealed road to wilpena pounds in flinders ranges
gravel到底是什么车,是缩水山地,还是正儿八经的公路车,今天就让我们
kent为车友介绍的正是目前公路自行车范畴最重口味的玩法——"gravel