Cómo Regular El Cambio Trasero (Mecánico)

A few weeks ago on the GCN program, we asked you what type of gearbox you use, and the vast majority of you said you use a mechanical one. So, we've set to work creating a guide on how to adjust your rear derailleur. Make sure you subscribe to GCN en Español: http://gcn.eu/Suscribirse The GCN Shop: http://gcn.eu/T3 GCN en Español T-shirt: http://gcn.eu/T4 Spain T-shirt: http://gcn.eu/T5 USA T-shirt: http://gcn.eu/T6 Mexico T-shirt: http://gcn.eu/T7 Colombia T-shirt: http://gcn.eu/T8 Great Britain T-shirt: http://gcn.eu/T9 We might need to adjust the derailleurs because we have several sets of wheels and the sprockets don't match, or because we've bumped the bike while parking. In that case, we should check the derailleur hanger. With mechanical derailleurs, the cable might be in bad condition, worn, or old. The derailleur's function is to guide the chain across the sprockets, and the gear ratio depends on the sprocket size. What we're going to do is tell the derailleur where to stop so the chain is perfectly aligned between the derailleur and the sprockets. We'll start by setting the derailleur's limits. With the chain on the large chainring, we'll shift to the smallest sprocket. For this, we'll need a Phillips screwdriver and adjust the external screw marked with an H (we'll point to it). The best way to adjust this is by looking at the bike from the back. By adjusting the screw, we're telling the derailleur its limit. We'll adjust it until the pulleys are aligned with the sprocket. A good indicator that it's properly adjusted is the sound. This will prevent the derailleur from shifting too far and the chain from coming off between the smallest sprocket and the frame. Now let's move on to the other limit, the one on the inner or largest sprocket. Here, we'll adjust the screw marked with an L. This is important because if the chain comes off the top, we could find the derailleur inside the wheel and break it. We'll put on the largest sprocket and align the shifters with it. Here, we can tighten the shifter by hand, as if pulling the cable (we wouldn't do this with electronic shifting), to see if the limit screw is too short. Let's try shifting the sprocket up and down and see if it struggles to shift. If so, we can give the L screw a quarter turn to make it easier to shift. When the chain skips between sprockets or the shifting isn't as smooth or fast as we think it should be, then we might need to adjust it. So let's get to it. To begin, let's look at how it works. We have the actuator in the shifter; in this case, each press will release or retract the cable. If we follow the cable, we reach the derailleur. The derailleur guides the chain across the sprockets, and it moves with the tension or slack of the cable. So, what we need to do is ensure the derailleur is precisely aligned with the sprockets when we press the lever for it to work correctly. First, we'll go to the lowest cog on the shifter, which may or may not be the same as the derailleur cog due to insufficient cable. We need to check the cable tension. If it's too loose, we can tighten it manually with the adjuster, or we can loosen the cable and tighten it with an Allen wrench. I think the latter is better, as it gives us more leeway with the manual adjuster for fine-tuning. If the cable is too loose and we have to adjust it with the adjuster, we might run out of screws. Turning the adjuster will allow us to tighten or loosen the cable very slightly, which will cause the derailleur to shift up or down a little. Now for the fine-tuning. We'll do a quick up-and-down motion. This will give us an idea of ​​what we need to do. We'll see if it's difficult to shift up or down, and if we can reach the outermost cogs and if we've adjusted the screws that stop the derailleur correctly. Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto / http://www.bettiniphoto.net/ GCN en Español is the best YouTube channel about road cycling. We teach you how to be a better cyclist with our videos and tutorials. We'll help you improve your climbing, descending, or something as simple as using clipless pedals. You'll also find the latest news and the best gear, along with the latest updates from the world of road cycling, right here. Our former professional cyclists will cover everything: racing, road cycling, components, bike maintenance, training, preparation, and much more! Join us on the best Spanish-language cycling channel on YouTube. Subscribe: http://gcn.eu/YT Facebook: http://gcn.eu/facebook-espanol Instagram: http://gcn.eu/instagram-espanol Twitter: http://gcn.eu/twitter-espanol #cycling #gcninspanish