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        <meta name="description" content="不需要动曲柄和中轴你就可以测量Q值。只需要用图中所示的尺子或游标卡尺就可以。" />
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                                <h1>如何测量自行车Q值</h1>
                
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        如何测量自行车Q值
        
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                                                <a href="/files/blog/full/measuring-bicycle-q-factor.jpeg" title="第一步：左边" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/measuring-bicycle-q-factor.jpeg" alt="测量自行车Q值" title="第一步：左边" />
                        </a>
                        <div class="blog_pic_text"><p>你不需要动曲柄和中轴就可以测量Q值。首先，使用图片中显示的尺子或者游标卡尺测量出齐发外边和左边曲柄外边之间的距离。</p></div>
                    </div>
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/measuring-bicycle-q-factor-step-2.jpeg" title="第二步：测量右边" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/measuring-bicycle-q-factor-step-2.jpeg" alt="测量自行车Q值第二步" title="第二步：测量右边" />
                        </a>
                        <div class="blog_pic_text"><p>然后同样方法测量右边的数值，并且计算：左边的距离+右边的距离-气阀直径。我有一个自动气阀（美式气门嘴）直径为7毫米。所以我的计算结果为 83 + 83 - 7 = 159mm. 对于山地车的曲柄设置来说还不错。</p></div>
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                                            <!-- div class="clear"></div -->
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/fsa-small-q-factor-road-bike-crankset.jpeg" title="147毫米 FSA 小Q值公路自行车曲柄链轮" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/fsa-small-q-factor-road-bike-crankset.jpeg" alt="FSA 小Q值公路自行车曲柄链轮" title="147毫米 FSA 小Q值公路自行车曲柄链轮" />
                        </a>
                        <div class="blog_pic_text"><p>狭窄的曲柄臂（小的Q值）可以减轻你膝盖的压力并帮你增速5%。相对的 - 宽的Q值（大于190毫米）则会让人感觉不舒服，特别是对于窄座来说。</p></div>
                    </div>
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/smaller-q-factor-crankset.jpeg" title="小的Q值曲柄链轮" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/smaller-q-factor-crankset.jpeg" alt="小的Q值曲柄链轮" title="小的Q值曲柄链轮" />
                        </a>
                        <div class="blog_pic_text"><p>如果你的是个山地自行车，混合型或者旅行自行车的话 - 对一些路来说最快捷简便的改变曲柄值的方法是双倍或者三倍。你的是公路自行车？需要改变轴承架为较短的主轴。</p></div>
                    </div>
                                            <!-- div class="clear"></div -->
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/force-crank-arm-removal.jpeg" title="强制移除方托架曲柄臂" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/force-crank-arm-removal.jpeg" alt="强制曲柄臂移除" title="强制移除方托架曲柄臂" />
                        </a>
                        <div class="blog_pic_text"><p>我的故事比较复杂。我只需要其他型号的牙盘碟片组，所以我在当地的自行车店里购买了普通山地车的牙盘整体。移除旧的曲柄花了我几个小时，那是个人肉和金属的斗争。当我的专业工具坏掉后，我干脆用电锯将旧的曲柄臂给弄掉了。</p></div>
                    </div>
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/bottom-blacket-replaced.jpeg" title="底部托架更换" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/bottom-blacket-replaced.jpeg" alt="底部托架更换" title="底部托架更换" />
                        </a>
                        <div class="blog_pic_text"><p>最终由于新的牙盘更换Q值从186毫米增加到了190毫米还多。对于小臀部的我来说，就好像是在骑大象一样。于是我不得不继续跟金属奋战，我将就的底部托架更换为新的FSA铝合金配件。126毫米到103毫米 - 23毫米的差值。耶！</p></div>
                    </div>
                                            <!-- div class="clear"></div -->
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/left-crank-machined.jpeg" title="左边曲柄加工" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/left-crank-machined.jpeg" alt="左边曲柄加工" title="左边曲柄加工" />
                        </a>
                        <div class="blog_pic_text"><p>对于混合型自行车来说更改后的167毫米Q值很正常，但是我还不满意。我继续加工改造将每边的曲柄臂值又减小了4毫米。</p></div>
                    </div>
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/changing-q-factor.jpeg" title="改变Q值：底部托架加工" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/changing-q-factor.jpeg" alt="改变Q值" title="改变Q值：底部托架加工" />
                        </a>
                        <div class="blog_pic_text"><p>而后我又加工了底部托架的边缘 - 只有1毫米。就快好了，只需要把口子合上。保持链条中心线不是问题，因为我拿掉了22牙牙盘碟片组，现在32牙牙盘碟片组是第一个。</p></div>
                    </div>
                                            <!-- div class="clear"></div -->
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/smaller-q-factor-diy.jpeg" title="小Q值DIY：打磨方形托架孔" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/smaller-q-factor-diy.jpeg" alt="小Q值DIY" title="小Q值DIY：打磨方形托架孔" />
                        </a>
                        <div class="blog_pic_text"><p>为了让曲柄臂能够使底部中轴托架靠近底部托架的边缘，需要进行打磨。曲柄臂有5毫米的距离需要被压合。重要的是不能打磨太多 - 不然就太松了。</p></div>
                    </div>
                                                        <div class="blog_half_block">
                                                <a href="/files/blog/full/small-q-factor-crankset.jpeg" title="小Q值牙盘" class="fancybox-button" rel="fancybox-button">
                            <img src="/files/blog/800/small-q-factor-crankset.jpeg" alt="小Q值牙盘" title="小Q值牙盘" />
                        </a>
                        <div class="blog_pic_text"><p>太棒了！曲柄臂成功安装到了底部托架边缘，一点缝隙都没有。新的159毫米Q值简直太舒服了！自行车上的人体工学半寸都是疼痛与舒适的天壤之别。继续尝试不要放弃，结果绝对是值得的。</p></div>
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                <div class="blog_author_hdr">Alex Belinski</div>
 I'm <a rel="nofollow" href="https://tiktok.com/@gethigh.fit">Alex</a>, that crazy guy behind GETHIGH <a href="/blog/1-minute-indoor-cycling-game-setup/">cycling game</a>.<br> And I'm nothing without the <a href="/page/team/">team</a>
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