How is cassette ratio calculated?
Working out the gear range of your cassette
You work out the gear range of the cassette by dividing the biggest cog by the smallest, so 42/10 = 4.20 = 420 %.
What is the cassette ratio?
Cassette gear ratios
In general, cassettes start at 10, 11 or 12 teeth. Again, there are exceptions, with options available with 9-, 13- or 14-tooth smallest sprockets. You may sometimes see brands refer to their cassettes as having a certain range in the form of a percentage.
What does an 11 30 cassette mean?
Switching the cassette to an 11-30 decreases the speed from 14.1 to 13.2 km/h and switching to an 11-34 decreases it to 11.6 km/h. These cassettes have the same 11 tooth small cog, so maximum speed is not affected.
Which cassette ratio is best for climbing?
All other things being equal, the 34T sprocket on the 11-34T cassette is going to give you the easiest gear. If your bike is currently fitted with an 11-28T cassette, switching to an 11-34T cassette will make climbing less of a struggle.
What is a 1 to 1 gear ratio bike?
If we have a chainring with 30 teeth and a sprocket with 30 teeth, there is no difference between the two; one full revolution of the pedals will result in one full revolution of the wheel. As a ratio, this is 1 to 1 (1:1).
How do you read a gear ratio chart?
Find Your Effective Gear Ratio With This Equation – YouTube
What is a 12/25 cassette?
Each sprocket has a different amount of teeth. A higher amount of teeth makes it easier to pedal than a low number and vice versa. Most road bikes come supplied with a 12–25T cassette, where the smallest sprocket has 12 teeth and the largest sprocked has 25 teeth.
Is 11/32 cassette Good for hills?
For hill climbing and mountainous terrain, we recommend a road cassette such as the 11-32T SRAM Red 22 XG1190 11 Speed Cassette (A2), or the 11-34T Shimano Ultegra R8000 11 Speed Cassette.
What gear ratios do Tour de France riders use?
A 53/39t chainset is common, with a smaller 36t inner chainring available for mountain stages. Cassette options include two choices, an 11-29t and 11-32t.
Is a 11/28 cassette Good for hills?
When you have built up your leg muscles and are powering up most hills, swap a lower range cassette, such as an 11-28, back in. You don’t need to do this if you are a frequent cyclist, young, with strong legs, fitter than average, or if you live in a flat place with no hills.
What is a 3.42 gear ratio?
Axle ratios may be expressed in notation as something along the lines of “3.42:1,” or a “3.42 rear axle.” In either case, it essentially means the drive shaft and pinion need to rotate 3.42 times in order to rotate the axle shafts once.
What does a 4.10 gear ratio mean?
Gear Ratio: the ratio of the ring and pinion gears in the rear axle. So, if you have a 4.10:1 (sometimes 4.10) rear axle, the pinion will turn 4.10 times for every single turn of the ring gear or in other words, for every 4.10 turns of the driveshaft, the rear wheel will spin once.
How do I know my cassette size?
How to know your cassette size! – YouTube
What cassettes do Tour de France riders use?
The most common cassette size used in the peloton is an 11-28t. That is positively humongous compared to the 11-21t cassette that was common a few decades ago when you’d be lucky if you got an 11-23t for the mountains. Since Shimano went to 11-speed though, the 11-28t cassette has become popular.
What is the difference between 11 28 and 11 30 cassette?
The difference is pretty easy to quantify mathematically. Going from a 28 to a 30T sprocket gives a 2/28th reduction in gearing – so about 7%. What that means is that if you’re going up a hill on your current 28T spinning at 100RPM, you’d need to pedal at 107RPM for the same speed.
What gears Did Lance Armstrong use?
Armstrong’s aluminum T.A. cogset had a 21-22-23 on top. Even with a sparking clean chain and cogs in the morni … After Lance Armstrong found on L’Alpe d’Huez that he wanted a 22 and did not have it, he did something about it for the beyond-category climbs of the Tourmalet and Luz Ardiden today.
What gearing does Chris Froome use?
Gearing consisted of 52/38 chainrings, and an 11-28 cassette, which he turned at an average cadence of 97rpm. Using this information, and some complicated maths, we can estimate that Froome spent most of his time using a 38×21 gear ratio.
Are 3.73 or 4.10 gears better?
4.10s are going to accelerate faster and decelerate faster on lift. However the trade off is greater fuel consumption per mile driven and higher engine speed per given road speed. In basic terms the 4.10s will feel quicker and 3.73 will feel faster.
What is a 3.73 gear ratio?
This number is shown in the ratio, which represents the number of the ring gear’s teeth divided by the number of the pinion’s teeth. If a truck has an axle ratio of 3:73:1, for example, the driveshaft turns 3.73 times for each full wheel spin.
What is the difference between a 3.73 and a 4.10 axle ratio?
That 3.73 vs. a 4.10 has a huge impact on engine rpm because you are selecting second gear with a 3.73 to pull the grade, but you can hit third gear with a 4.10. Your engine speed is about 1,000 rpm lower, so temperatures under hood are going to be significantly lower.
What size cassette do pro cyclists use?
What gear ratios do professional cyclists use?
Pros often use a 55×11-tooth high gear for time trials. On flat or rolling stages they might have 53/39T chainrings with an 11-21T cassette. In moderate mountains they switch to a large cog of 23T or 25T. These days, they’ve joined the big-gear revolution like many recreational riders.
Did Lance Armstrong have a hidden motor on his bike?
Armstrong has faced the same accusation before but dismissed it out of hand, saying nobody during the period of his career was even aware of the technology required to conceal a motor in a racing bike. No evidence has ever emerged he used a motor.
What gearing do Tour de France riders use?
Which gear is best for cycling uphill?
Low Gear = Easy = Good for Climbing: The “low” gear on your bike is the smallest chain ring in the front and the largest cog on your cassette (rear gears). In this position, the pedaling will be the easiest and you’ll be able to pedal uphill with the smallest amount of resistance.