下面是@machineaddict和@Mafnah回答的组合，为Bootstrap 3重写(到目前为止对我来说很好):

@media (min-width: 768px){
    .fivecolumns .col-md-2, .fivecolumns .col-sm-2, .fivecolumns .col-lg-2  {
        width: 20%;
        *width: 20%;
    }
}
@media (min-width: 1200px) {
    .fivecolumns .col-md-2, .fivecolumns .col-sm-2, .fivecolumns .col-lg-2 {
        width: 20%;
        *width: 20%;
    }
}
@media (min-width: 768px) and (max-width: 979px) {
    .fivecolumns .col-md-2, .fivecolumns .col-sm-2, .fivecolumns .col-lg-2 {
        width: 20%;
        *width: 20%;
    }
}

只需创建一个新类，并根据需要定义每个媒体查询的行为

@media(min-width: 768px){
  .col-1-5{
    width: 20%;
    float: left;
    position: relative;
    min-height: 1px;
    padding-right: 5px;
    padding-left: 5px;
  }
}

<div class="container-fluid">
  <div class="row">
    <div class="col-1-5">col 1</div>
    <div class="col-1-5">col 2</div>
    <div class="col-1-5">col 3</div>
    <div class="col-1-5">col 4</div>
    <div class="col-1-5">col 5</div>
  </div>
</div>

这里是一个工作演示https://codepen.io/giorgosk/pen/BRVorW

我对Mafnah的答案进行了投票，但再看一遍，如果你保持默认的边际，我建议下面的答案更好。

<div class="equal row-fluid">
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
</div>

.equal .span2 {
    width: 17.9%;
}

<div class="equal row-fluid">
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
</div>

.equal .span2 {
    width: 20%;
}

我对这个问题的首选方法是基于make-grid-columns mixin，利用现有的Bootstrap变量创建一个SASS mixin。

// Custom Grid Columns
// 
// $name - determines the class names: eg. ".col-5ths, .col-sm-5ths ..."
// $size - determines the width (2.4 is one fifth of 12, the default number of columns)
@mixin custom-grid-columns($name, $size, $grid-columns: $grid-columns, $breakpoints: $grid-breakpoints) {
    $columns: round($grid-columns / $size);

    %custom-grid-column {
        @include make-col-ready();
    }

    @each $breakpoint in map-keys($breakpoints) {
        $infix: breakpoint-infix($breakpoint, $breakpoints);

        .col#{$infix}-#{$name} {
            @extend %custom-grid-column;
        }

        @include media-breakpoint-up($breakpoint, $breakpoints) {
            // Create column
            .col#{$infix}-#{$name} {
                @include make-col($size);
            }

            // Create offset
            @if not ($infix=="") {
                .offset#{$infix}-#{$name} {
                    @include make-col-offset($size);
                }
            }
        }
    }
}

然后可以调用mixin来生成自定义列类和偏移量类。

@include custom-grid-columns('5ths', 2.4);

在bootstrap 3中，我认为我们可以这样做，删除左右边距:

<div class="row this_row">
    <div class="col-md-2 col-md-offset-1"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
</div>

和CSS

.this_row {
    margin: 0 -5%;
}