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23<div id="content" class="site-content clr"><article id="post-23366"><header class="entry-header clr"><h2 class="single-post-title entry-title" itemprop="headline">5 Reasons Why Bottom Bracket Upgrades Are Often Pointless</h2></header><ul class="meta ospm-default clr"><li class="meta-author" itemprop="name"><span class="screen-reader-text">Post author:</span><i class=" icon-user" aria-hidden="true" role="img"></i><a href="https://brainybiker.com/archives/author/brainy_main_writer" title="Posts by B.Writer" rel="author"  itemprop="author" itemscope="itemscope" itemtype="https://schema.org/Person">B.Writer</a></li><li class="meta-date" itemprop="datePublished"><span class="screen-reader-text">Post published:</span><i class=" icon-clock" aria-hidden="true" role="img"></i>0</li><li class="meta-cat"><span class="screen-reader-text">Post category:</span><i class=" icon-folder" aria-hidden="true" role="img"></i><a href="https://brainybiker.com/archives/category/maintenance" rel="category tag">Maintenance</a> <span class="owp-sep">/</span> <a href="https://brainybiker.com/archives/category/mtb" rel="category tag">MTB</a> <span class="owp-sep">/</span> <a href="https://brainybiker.com/archives/category/road-bikes" rel="category tag">Road Bikes</a></li><li class="meta-comments"><span class="screen-reader-text">Post comments:</span><i class=" icon-bubble" aria-hidden="true" role="img"></i><a href="https://brainybiker.com/archives/23366#respond" class="comments-link" >0 Comments</a></li></ul><div class="entry-content clr" itemprop="text"><p>Despite all the noise and hype, the reality is that bottom-bracket upgrades are a bit overrated, to put it mildly.</p><p>Below are 5 reasons why it&#8217;s not worth investing in a &#8220;superior bottom bracket&#8221; unless it&#8217;s part of a bigger upgrade.</p><h2 class="wp-block-heading">1. High and Low-end Bottom Brackets Offer Similar Performance</h2><div class="wp-block-image"><figure class="aligncenter size-full is-resized"><noscript><img decoding="async" width="795" height="440" src="https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1.jpg" alt="" class="wp-image-10993" style="width:841px;height:auto" srcset="https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1.jpg 795w, https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1-300x166.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1-768x425.jpg 768w" sizes="(max-width: 795px) 100vw, 795px" /></noscript><img decoding="async" width="795" height="440" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20795%20440%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1.jpg" alt="" class="lazyload wp-image-10993" style="width:841px;height:auto" data-srcset="https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1.jpg 795w, https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1-300x166.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/10/vintage-bottom-bracket-final-1-768x425.jpg 768w" data-sizes="(max-width: 795px) 100vw, 795px" /></figure></div><p class="has-background" style="background-color:#f2f2f2">If we take two bottom brackets, one from the high-end segment and another from the low-end, you will be hard-pressed to notice the difference between the two provided that each unit is in good working condition.</p><p>For example, my <a href="https://brainybiker.com/how-i-put-a-full-fender-and-mud-flap-on-suspension-fork-photos/" data-type="post" data-id="42">hardtail MTB</a> has a basic Shimano <a href="https://brainybiker.com/square-taper-vs-hollowtech-comparison-and-analysis/" data-type="post" data-id="14272">square taper bottom bracket</a> with 1000s of kilometers on it. I&#8217;ve also ridden a bicycle that had a bottom bracket with external bearings.</p><p><strong>Did I feel a difference? Not really. </strong>(And I am not ashamed to say that.)</p><p>I am not saying there isn&#8217;t a difference. It&#8217;s just not noticeable enough to matter in a practical context.</p><p><strong>Why is that? </strong></p><p>The parameters that make a higher-end bottom bracket superior are not as tight to performance as one might think.</p><p><strong>The main advantages of higher-end bottom brackets are:</strong></p><ul class="wp-block-list"><li><strong>Lighter weight</strong> (If your goal is to save weight, that&#8217;s helpful. But the weight of the bottom bracket doesn&#8217;t matter when it comes to the unit&#8217;s performance.)</li></ul><ul class="wp-block-list"><li><strong>Compatibility with higher-end cranks</strong> (This is a significant advantage but doesn&#8217;t equate to better performance of the bottom bracket itself.)</li></ul><ul class="wp-block-list"><li><strong>Greater durability</strong> (This is also a significant advantage but in this case, we are comparing working bottom brackets. So, the extra durability doesn&#8217;t matter in the short term.)</li></ul><p class="has-background" style="background-color:#f3f3f3">Ultimately, the main advantages of a higher-end bottom bracket don&#8217;t directly contribute to superior performance.</p><p>And if anybody tells you otherwise, remind them that champions like Eddie Merckx used bottom brackets (old-school square tapers) that would be considered a major downgrade today.</p><p>Would Eddie Merckx be faster with the latest bottom bracket?</p><p>For real. Ask yourself this question and answer honestly :).</p><p class="has-background" style="background-color:#f2f2f2"><strong>Bottom line:</strong> As long as a bottom bracket is of acceptable quality and in decent condition, its performance is comparable to that of a higher-end model from a practical/perceivable perspective. <br><br>Higher-end bottom brackets offer advantages, but as long as the basic function of the bottom bracket unit (smooth rotation of the crank) is intact, switching to a high-end unit will not have a phenomenal if any effect on your performance.</p><h2 class="wp-block-heading">2. Bottom Bracket Weight Savings Are Real But Also Inconsequential</h2><div class="wp-block-image"><figure class="aligncenter size-full is-resized"><noscript><img decoding="async" width="800" height="495" src="https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1.jpg" alt="" class="wp-image-14278" style="width:732px;height:auto" srcset="https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1-300x186.jpg 300w, https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1-768x475.jpg 768w" sizes="(max-width: 800px) 100v
23w, 800px" /></noscript><img decoding="async" width="800" height="495" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20800%20495%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1.jpg" alt="" class="lazyload wp-image-14278" style="width:732px;height:auto" data-srcset="https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1-300x186.jpg 300w, https://brainybiker.com/wp-content/uploads/2022/02/shimano-deore-hollowtech-bottom-bracket-1-768x475.jpg 768w" data-sizes="(max-width: 800px) 100vw, 800px" /></figure></div><p>A Hollowtech bottom bracket is about <a href="https://brainybiker.com/square-taper-vs-hollowtech-comparison-and-analysis/" data-type="post" data-id="14272">3.4 times lighter</a> than a square taper model. That&#8217;s nice if you&#8217;re trying to build the lightest possible bicycles out there, but when it comes to performance <strong>the weight savings are inconsequential because the bottom bracket is in the middle of the bicycle.</strong></p><p>Saving weight at the front or rear has a real, maybe even evident, impact, but when the weight is situated in the middle, <strong>150 grams are non-perceivable</strong>.</p><hr class="wp-block-separator has-alpha-channel-opacity"/><p>Remember that most of the rider&#8217;s weight is over the rear wheel and the bottom bracket shell. Therefore, the middle of the bike is a location that one can load heavily before feeling an effect.</p><div class="wp-block-image"><figure class="aligncenter size-full is-resized"><noscript><img decoding="async" width="776" height="406" src="https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1.jpg" alt="" class="wp-image-6367" style="width:850px;height:auto" srcset="https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1.jpg 776w, https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1-300x157.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1-768x402.jpg 768w" sizes="(max-width: 776px) 100vw, 776px" /></noscript><img decoding="async" width="776" height="406" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20776%20406%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1.jpg" alt="" class="lazyload wp-image-6367" style="width:850px;height:auto" data-srcset="https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1.jpg 776w, https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1-300x157.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/02/bmx-bottom-bracket-shell-1-768x402.jpg 768w" data-sizes="(max-width: 776px) 100vw, 776px" /></figure></div><p>For instance, I carry my <a href="https://brainybiker.com/how-to-stop-a-folding-bicycle-lock-from-rattling-2-simple-tips-photos/" data-type="post" data-id="149">folding lock</a> on the seat tube. That lock weighs over 2lbs (I think), but I don&#8217;t really care. I can still perform a small bunny hop with my commuter bike.</p><p>However, if the weight was at the front or the rear, some technical movements would be a lot more difficult.</p><h2 class="wp-block-heading"><strong>3. The Money Can Be Invested Elsewhere</strong></h2><p>Bottom brackets are not expensive (unless you go for a very exotic model), but if you don&#8217;t need a new one, the money can be invested in components and accessories that make a <strong>bigger difference. </strong></p><p>For instance, you can get a small <a href="https://brainybiker.com/handlebar-bag-vs-frame-bag/" data-type="post" data-id="8896">handlebar</a> bag or a saddlebag. Once I began bike commuting some 5 years ago, I quickly found out that accessories such as bags and clothing could be a lot more important than minor upgrades as long as the bike is in working condition, of course.</p><div class="wp-block-image"><figure class="aligncenter size-large"><noscript><img decoding="async" width="686" height="1024" src="https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-686x1024.jpg" alt="" class="wp-image-1552" srcset="https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-686x1024.jpg 686w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-201x300.jpg 201w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-768x1146.jpg 768w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-1029x1536.jpg 1029w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1.jpg 1047w" sizes="(max-width: 686px) 100v
23w, 686px" /></noscript><img decoding="async" width="686" height="1024" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20686%201024%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-686x1024.jpg" alt="" class="lazyload wp-image-1552" data-srcset="https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-686x1024.jpg 686w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-201x300.jpg 201w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-768x1146.jpg 768w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1-1029x1536.jpg 1029w, https://brainybiker.com/wp-content/uploads/2020/08/carradice-sqr-super-slim-in-action-1.jpg 1047w" data-sizes="(max-width: 686px) 100vw, 686px" /></figure></div><p>Here&#8217;s a full list of small parts and accessories that you might get for the price of an average bottom bracket:</p><ul class="wp-block-list"><li>Handlebar bag</li><li>Saddlebag</li><li><a href="https://brainybiker.com/saddlebag-vs-tool-bottle/" data-type="post" data-id="8940">Tool bottle</a></li><li>Multi-tool</li><li>Disc rotor</li><li>New gear/brake cables</li><li>Gear/brake cable housing</li><li>Brake-shifter</li><li>Shifter</li><li>Inner tubes</li><li>A Tire</li><li>A New Rim (if you use cheap ones)</li><li>A Bell</li><li>A Smartphone holder</li><li><a href="https://brainybiker.com/bullhorns-vs-risers-pro-cons-compared/" data-type="post" data-id="22070">New handlebars</a></li><li>Bike Poggies for the Winter</li></ul><p>&#8230;you get the idea.</p><h2 class="wp-block-heading"><strong>4. Zero Aesthetic Gains</strong></h2><p>The bottom bracket is practically an invisible bike part as 90% of it are in the frame; the cranks hide the remaining 10%.</p><figure class="wp-block-pullquote"><blockquote><p><strong>Thus, a new bottom bracket won&#8217;t add a new style and freshness to your bike.</strong></p></blockquote></figure><p>There&#8217;s one expectation, however. If you need the bottom bracket so that you can install a new set of crank and chainrings, the story changes because those are <strong>crucial for aesthetics</strong>.</p><figure class="wp-block-image size-full"><noscript><img decoding="async" width="800" height="607" src="https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1.jpg" alt="" class="wp-image-9274" srcset="https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1-300x228.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1-768x583.jpg 768w" sizes="(max-width: 800px) 100vw, 800px" /></noscript><img decoding="async" width="800" height="607" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20800%20607%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1.jpg" alt="" class="lazyload wp-image-9274" data-srcset="https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1-300x228.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/07/conver-french-cranks-threads-to-british-pedals-solida-cranks-1-768x583.jpg 768w" data-sizes="(max-width: 800px) 100vw, 800px" /><figcaption class="wp-element-caption">Nothing beats the look of old-school cranks (IMO)</figcaption></figure><h2 class="wp-block-heading"><strong>5. Extra Mechanical Work </strong></h2><p>Replacing a bottom bracket is a fairly straightforward process (if you have the right tools for your particular type), but at the end of the day, it&#8217;s a time and energy investment that can go elsewhere.</p><p>[Of course, this point doesn&#8217;t apply if your bike is already stripped for another repair/upgrade.]</p><hr class="wp-block-separator has-alpha-channel-opacity"/><p>If you want to upgrade from a square taper to Hollowtech, you will need the following tools:</p><ul class="wp-block-list"><li>Crank extractors (plus wrenches for them)</li><li>Bottom bracket socket</li><li>Hollowtech wrench</li><li>Allen keys</li></ul><p>To be honest, it&#8217;s nice to invest in those tools because you will need them sooner or later when you have replace a worn bottom bracket.</p><figure class="wp-block-image size-full"><noscript><img decoding="async" width="800" height="716" src="https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1.jpg" alt="" class="wp-image-15221" srcset="https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1-300x269.jpg 300w, https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1-768x687.jpg 768w" sizes="(max-width: 800px) 100v
23w, 800px" /></noscript><img decoding="async" width="800" height="716" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20800%20716%22%3E%3C/svg%3E' data-src="https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1.jpg" alt="" class="lazyload wp-image-15221" data-srcset="https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1.jpg 800w, https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1-300x269.jpg 300w, https://brainybiker.com/wp-content/uploads/2022/03/working-on-my-road-bike-in-the-living-room-1-768x687.jpg 768w" data-sizes="(max-width: 800px) 100vw, 800px" /></figure><p>(<strong>Tip:</strong> To check if your bottom bracket is worn, put the bike on a stand [or let it hang off a branch] and take the chain off. Then, spin the cranks with your hand slowly. If the cranks are rotating smoothly, there&#8217;s no noise and the <a href="https://brainybiker.com/why-is-my-bottom-bracket-wobbling-simple-explanation/" data-type="post" data-id="19134">bottom bracket doesn&#8217;t wobble</a>, it&#8217;s all good. If not, service the bottom bracket (if possible) or replace it.</p><h2 class="wp-block-heading"><strong>When Is a Bottom Bracket Upgrade Justified</strong></h2><p><strong>I am not a bottom-bracket hater</strong> (haha).</p><p>I am a bike enthusiast and mechanic myself and realize their importance.</p><p>However, I would replace my bottom bracket only in the following cases:</p><ul class="wp-block-list"><li>I want to install <a href="https://brainybiker.com/can-i-use-a-12-speed-crankset-with-an-11-speed-cassette/" data-type="post" data-id="22169">new cranks</a> on my bike and they aren&#8217;t compatible with my old bottom bracket.</li><li>The old bottom bracket is non-serviceable (<a href="https://brainybiker.com/sealed-vs-unsealed-bottom-brackets-comparison-analysis/" data-type="post" data-id="18314">sealed</a>) and in bad condition (squeaking and rotating poorly)</li><li>The axle of the bottom bracket is bent or broken.</li></ul><p><strong>Note:</strong> In the last two cases, you can go for the same model you&#8217;re replacing if it&#8217;s available, of course.</p><hr class="wp-block-separator has-alpha-channel-opacity"/><p class="has-text-align-center"><strong>Good luck my friend. </strong></p><p class="has-text-align-center"><strong>And thank you for visiting my website. </strong></p></div><div class="post-tags clr"> <span class="owp-tag-texts">Tags</span>: <a href="https://brainybiker.com/archives/tag/bottom-bracket" rel="tag">bottom bracket</a><span class="owp-sep">,</span> <a href="https://brainybiker.com/archives/tag/maintenance" rel="tag">maintenance</a><span class="owp-sep">,</span> <a href="https://brainybiker.com/archives/tag/upgrade" rel="tag">upgrade</a></div><nav class="navigation post-navigation" aria-label="Read more articles"><h2 class="screen-reader-text">Read more articles</h2><div class="nav-links"><div class="nav-previous"><a href="https://brainybiker.com/archives/21672" rel="prev"><span class="title"><i class=" fas fa-long-arrow-alt-left" aria-hidden="true" role="img"></i> Previous Post</span><span class="post-title">Tips For Removing a Stuck Thru-Axle (let&#8217;s do it)</span></a></div></div></nav><section id="related-posts" class="clr"><h3 class="theme-heading related-posts-title"> <span class="text">You Might Also Like</span></h3><div class="oceanwp-row clr"><article class="related-post clr col span_1_of_3 col-1 post-9175 post type-post status-publish format-standard has-post-thumbnail hentry category-commuting category-maintenance category-questions tag-commuting tag-derailleurs tag-maintenance tag-questions mv-content-wrapper entry has-media"><figure class="related-post-media clr"> <a href="https://brainybiker.com/archives/9175" class="related-thumb"> <noscript><img width="300" height="245" src="https://brainybiker.com/wp-content/uploads/2021/07/can-you-use-a-10-speed-derailleur-with-11-speed-cassette-1-300x245.jpg" class="attachment-medium size-medium wp-post-image" alt="Read more about the article The Compatibility Of 10-speed Derailleurs And 11-speed Cassettes (an analysis by a brainy biker)" itemprop="image" decoding="async" srcset="https://brainybiker.com/wp-content/uploads/2021/07/can-you-use-a-10-speed-derailleur-with-11-speed-cassette-1-300x245.jpg 300w, https://brainybiker.com/wp-content/uploads/2021/07/can-you-use-a-10-speed-derailleur-with-11-speed-cassette-1-768x628.jpg 768w, https://brainybiker.com/wp-content/uploads/2021/07/can-you-use-a-10-speed-derailleur-with-11-speed-cassette-1.jpg 800w" sizes="(max-width: 300px) 100v
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