Web bicycle resources

These resources help with buying, maintaining, and riding bikes.

Routing

cycle.travel creates detailed routes on backroads between towns.
Komoot helps plan day trips and fitness excursions.
PJAMM Cycling has profiles of cycling climbs around the world, which is helpful for comparing future rides to past ones.
BikeHopper combines biking with transit for practical, low-effort routes.
Epic Ride Weather provides route-oriented weather forecasts.
Plot A Route has features for carefully analyzing and tweaking a route.

99 Spokes can compare more than two bikes on many different metrics.
Bike Insights overlays the frame geometry of different bikes to compare them.
Geometry Geeks shows statistics about frame geometry and the quantitative difference between frames.
Bikotic compares bikes with a unique frame comparison slider, but only seems to have a complete list of Canyon bikes.
Bike Geometry Calculator makes it easy to analyze a custom frame geometry.
What Bars compares handlebars by their top-down profile.

People for Bikes Bicycle Network Analysis scores cities based on the connectivity and stress of their bicycle infrastructure.
Cyclist Video Evidence hosts videos of near misses from cyclists.

Strava is a social network that tracks performance metrics from bicycle trips.
ActivityFix can automatically correct Strava activities based on rules, like tagging weekday morning activities as commutes.
Crazy Guy on a Bike lets bicycle tourers record their journeys.
MyBikeTraffic.com adds on-bike radar estimates of car speeds to GPS routes.

Velo Routes Tools contains gear inches, grade, and unit conversion calculators.
Gearing x Power shows the speeds and power inputs required for various drivetrain options, taking into account the rider's weight and capabilities.
BikeCalc has gear inches and fixed gear-specific calculators.
Bicycle Drivetrain Calculator compares drivetrain gearing from several angles.
Cycling power and speed describes how power impacts the resulting speed of a bicyclist.

Rene Herse Tire Pressure Calculator shows the slow and firm pressures needed to minimize rolling resistance based on weight.
Silca Pro Tire Pressure Calculator shows recommended tire pressure for a variety of road conditions.
Bicycle Rolling Resistance reviews bike tires for efficiency and susceptibility to punctures.

DT Swiss Spoke Calculator takes many factors into account while sizing spokes for wheelbuilding.
SpokeCalc has a more JavaScript-heavy interface with a printable length sheet.
SON Spoke Length Calculator sizes spokes for the Schmidt SON hub dynamo.