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If you’re going a short distance: No, it doesn’t matter.

For a longer ride or a trail ride, the loss from the tires adds up. One extra MPH means a lot when you’re doing a multiple hour ride at an average of 10-15MPH.

Tire pressure influences rolling resistance significantly on larger tires. I’ll some times increase pressure on longer rides or for uphill portions. Lower pressures have more traction, so I’ll let air out for the downhills.

It doesn’t seem like much, but everything adds up as you push into longer and higher effort rides. Non bikers roll their eyes when we talk about saving small amounts of weight, for example, but it makes a difference over time with less weight to throw around. Again, you won’t notice on short rides around town but when you’re spending tens of hours every week on the bike in increments of 1-3 hour rides, it’s worth optimizing these things.



> One extra MPH means a lot when you’re doing a multiple hour ride at an average of 10-15MPH.

Why spend your effort on optimizing your bike performance by 8% if you can instead simply shorten the distance by 8%?


Recreational riding is about going places.

You could shorten your distance to zero by not leaving the house at all, but that's missing the point. I like to go places, and the further I can go on the same amount of energy the better.


1) You may "go places" by driving your car (that goes 50mph) closer to your target place. Then use your "unoptimized" bike to reach your target at shorter distance.

2) "shorten your distance to zero" is too extreme, because we need some physical exercise and want some enjoyable experience.


How exactly do you shorten trails, or race courses?


> How exactly do you shorten trails

You do not go all the way in.

Or pick shorter trails.

Or allow more time.

> race courses?

You may do less lapses.

Or pick a different (shorter) race.




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