On the left side, I put three small cog sizes – 10, 11, and 12. This chart is from the late-and-great Sheldon Brown’s online gear calculator. The other consequence is that the 10 tooth cog gives a substantial boost in top-end gearing – to the point where you should use a different size chainring in front. This isn’t good or bad per se – it just means that most older wheels won’t work with it.
#Gear vs cog driver
SRAM created a new design for this, called the XD driver (pictured below). cassette body – the part of your rear wheel where the gears attach). First, that 10 tooth cog will not fit on a standard freehub (a.k.a. This is a very cool concept, but it’s not without its consequences. SRAM broke ground with a 10-42, which you can see here: These systems make up for the lack of gear range up front by having a VERY wide range cassette out back. Single chainring (1x) systems arrived first for mountain bikes, but eventually for road and triathlon, too. With 11 total gears, fantastic new ranges became available, such as 11-25, 11-28, and 11-32. With that change, virtually every cassette on the market standardized to 11 teeth in the smallest cog. 10 cogs weren’t enough, so we went to 11.
Then – as we seem to do every five to seven years – we added another gear. With 10-speed systems, you could still find some cassettes with a 12 tooth small cog, but they became less common. When we evolved from 9 to 10-speed systems, people wised up and said – rather than have the limited range of an 11-23 or 12-25, why don’t we put them together and make an 11-25? All you have to do is tack on an 11t cog to the 12-25 – or a 25t cog to the 11-23. When we started adding cassette cogs and widening cassette gear ranges, that 12 tooth small cog began to go away. We’ll talk through the issues in this article, and propose some solutions towards the end. 12 gears in the cassette), things have gotten a bit murky. With more single chainring drivetrains and 12-speed components on the way (i.e. What I’d like to talk about today is the evolution of the smallest cog size in your cassette. Going from a 12 tooth cog to an 11 will give you more “oomph” than going from a 53t chainring to a 54t. One more item to set the stage: Adding or subtracting a tooth from the cassette makes a bigger difference in your overall gearing than adding or subtracting a tooth from your chainring. If you want to go super slow (or up steep hills), you want a SMALL ring up front and a very BIG cog in back. In other words – if you want to go super fast, you want a BIG ring up front and a very SMALL cog in back. The front chainrings work in the opposite manner of the rear cassette – more teeth means taller gearing. Yes, there were a few other options, but these were by far the most common.įor the most part, we all had big chainrings up front – 53/39. If you were doing flat races, you used an 11-23. The smaller the cog, the taller your gearing (i.e. The smallest cog size out back had 11 or 12 teeth. We experiment with our gear ratio all the time and have come to the conclusion that our 44/16 ratio (2.75) is the perfect one for most of us riders.When I started to get serious about cycling, high-end road bikes had 9 gears in the rear cassette cluster (say, from Ultegra-level and up). This is all personal preference, guys and gals. A higher number will make it harder to accelerate but will give you a higher top speed. What does a higher or lower coefficient mean? Well - A lower number will make it easier to accelerate and maneuver the bike at slow speeds but will make for lower top speeds. Similarly, if the number gets lower, it means you're shrinking the main chainring or growing the rear cog. If the number gets higher, it means you're either shrinking the number of teeth on the rear cog or growing the number of teeth on the main chainring. We got tattoos of this number on our foreheads in our dreams last night. So how does a lower or higher ratio affect your riding? Well, a few ways. If you don't want to count, both are 16 teeth - One is a freewheel cog and one is a fixed cog. Also - You may notice our flip flop hub on the rear wheel: one cog on each side of the wheel. Again, 44 teeth on the front, 16 teeth on the back. So, we use what we feel is the perfect ratio for urban commuting, trick riding and performance: 44/16.
The (yy) second number refers to the number of teeth in the rear cog (name for smaller gear ring attached to the back wheel). The first number (xx/yy) refers to the number of teeth (sharp pointy things) on the chain ring by the pedals. Anybody know what that means? We do!īasically, you have two chain rings that the chain rides on: the big one in the front by the pedals and the small one in the back on the rear wheel.
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