30 lines
1.9 KiB
Markdown
30 lines
1.9 KiB
Markdown
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date: 2016-04-14
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title: I just Fixed the pro-peloton disc brake problem
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category: cycling
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---
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There has been boo-hoo-hooing the last few days about an injury sustained by Francisco Ventoso at Paris-Roubaix.
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Yes that spongey looking bit is his bone. It is seriously nasty and the UCI have [re-banned disc brakes](http://www.cyclingnews.com/news/uci-suspends-road-disc-brakes-in-races-after-ventoso-injury/) as a result.
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However, the fact is that disc brakes are a **lot** better than rim brakes. Rim brakes suck - especially in the wet. On carbon rims they suck even more even in the dry. In the wet, you may as well just give up. Ok, I am exagerating, a bit. It is not power which is the big difference though, but control. With a hydraulic disc, you can dial in just the amount you want. Overall this will mean less crashes - very important when you have 200 people all trying to share the same bit of road.
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There is admittedly a problem though, they are like big spinning knives. I would say that they are not the most dangerous think on a bike though. As GCN demonstrate in the video below, spokes are probably worse.
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<iframe width="560" height="315" src="https://www.youtube.com/embed/JplymlruPZ8" frameborder="0" allowfullscreen></iframe>
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The problem is that current disc rotors have the cross-section shown below:
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They have square corners, so yes that will be pretty sharp when it is spinning fast. I have a solution to this:
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Yes, simply machine down the shoulders so they are rounded instead of square. Now you no longer have spinning knives, more like spinning spoons.
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So there you go Shimano, SRAM and Campagnolo, I just fixed disc brakes for you.
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