Hot answers tagged

11

As long as you are moving through the air, aerodynamic drag will account for some portion of total drag. Here is a plot that shows the relative contribution of aerodynamic drag vs. rolling drag on total drag for a rider at constant speed on a flat surface with the given CdA (drag area) and Crr (coefficient of rolling resistance). There is no magic threshold ...


6

Schwalbe has a great chart from their rolling resistance page on major resistance force for bicycling. Noticeable air drag started from 15km/h and increase exponential after 20km/h. At 10Mph(16Kmh), good aero bikes doesn't show significant advantages. Even above 30km/h, typical aero bike cannot do much to reduce the air resistant : human are not ...


4

Clipless pedals are a matter of preference - you don't have to use them. There are alternatives such as "half clips" which might suit you better. I've come to like mine, with mtb shoes and pedals that are designed to be rideable with clipless or normal shoes on either side. These allow you to ride in an alternative position (with the pedal under the arch ...


4

Your technology is up to date. 53x12 is basically still the standard for road bikes today. If you want to increase the gearing, your best bet would be to install an 11x cassette, if not a Sram 10x. That said... If you are regularly finding your 53x12 too low it means one of three things: You are mashing (standing up in a heavy gear) instead of spinning (...


3

An 11 speed rear cassette gives you more linear gaps between gears. It doesn't necessarily give you higher or lower gears. There are bigger chainrings than 53 tooth, but they're rare, expensive, and tend to be single-speed track bikes. There are smaller cassettes than 12 tooth, 11 is the lowest you can get normally, and some folding bikes can go down to 9 ...


1

Changing to an 11 cog on the rear will certainly give you a higher gear. I found 9 speed Shimanos in 11/21 and 11/23 easily. I didn't find any road cassettes that had a lower low gear. I also found mountain bike versions with much larger low gears, but you probably need a new derailleur for them.


1

Keeping your feet in one position is important when you want to use all your power to pedal in the most efficient way, or you want your feet to be stable on the pedals, because you tackle some hard stuff and your feet tend to move from their position without you wanting it. For you, you use your bike for commuting, which means you have to swing around to ...



Only top voted, non community-wiki answers of a minimum length are eligible