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5

I am continuously amazed at the overemphasis placed on the weight of bikes. Yes it is important, but relative to other factors in deciding which bike to buy it is not that significant. Lets compare a 20lb bike to a 24lb bike. If your budget is $1000 for a new bike, would you choose a 20lb bike with very good components and a so-so feel/fit, or a 24lb bike ...


3

In almost all cases when servicing a hub the bearing DO need to be replaced. You may not be able to see it without the aid of a microscope, but the bearings will be slightly pitted after any appreciable period of use. As one user points out, high grade ballbearings in case hardened steel, even grade 25s are very cheap - why cut the corner? Case hardened ...


3

I think it is beneficial to pedal hard just on the summit. Although tired from the ascent, pedaling hard for 10 seconds quickly brings one to the target speed. Then one can recover on the downhill (tucking in to reduce air drag). Failing to do that leads to spending time in very low speed, waiting for gravity to accelerate the rider, and wasting many ...


2

I was answering the Physics.se version of this question but it got closed (probably rightly so), so I'm posting it here. The lighter pedals will have very little effect on the performance of your bike, other than through the overall weight, and particularly if you're pedalling at a steady cadence instead of accelerating and decelerating repeatedly. Making ...


2

I'll start by saying that finding solid data on wheel aerodynamics is tricky at best. Some of the better sources are worth taking the time to read in full, and provide much more information than I can provide here. For example, see the article from Tour Magazine [1] that covered the Mavic Cosmic Carbone SLR (similar, but not the same as what you asked ...


2

Because wind resistance is proportional to velocity squared it takes more power to go from 30 to 32 than from 15 to 17. So you get more bang from your pedal power at lower speeds. If it is a relatively short downhill and you have considerable speed you are typically better off coasting and then pedal when you get to a flat or flatter section. So you are ...


1

Running both tires at the same PSI could be your problem. In a comment you stated you are running both at 70 PSI. Tires of different width will typically have different design pressures. Larger tires run at lower pressure. Run both tires at the max pressure for that tire. On the sidewall will be an operating pressure range for that tire. Run both tires ...


1

There are lots of different field tests approaches. I've been using the Carmichael one (two 9-minute full out TTs with a cooldown between them).



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