Emergency Bike Braking: Stopping Distance and Brake Balance
In pairs, students measure how far it takes to stop a bike using only the rear brake versus both brakes with their weight shifted back, then practice emergency stops on a surprise signal. They learn braking technique, risk awareness and the basics of stopping distance.
How to play
- Mark a 25-yard lane with cones and a braking line at 15 yards; explain in 3 minutes that the front brake stops harder but requires weight back and firm arms.
- In pairs, one rides at an easy pace and brakes at the line with the rear brake only; the partner chalks the stopping point and measures the distance (5 min).
- Repeat using both brakes, about two-thirds of the force in front, hips back and eyes forward (5 min).
- Switch roles and repeat both tries at a slightly higher speed (6 min).
- Surprise stops (4 min): the teacher raises a red cone at a random moment and everyone must stop before a reference cone.
- Share out (2 min): compare distances and connect them to safe following distance on the street.
Rules
- Helmets buckled whenever you are on the bike.
- Only one bike per lane at a time; the next rider waits until it's clear.
- Squeeze the brakes progressively, never lock the front brake suddenly.
- Before starting, each pair checks that both brakes work.
Variations
Easier
Ride only at walking speed with a very visible braking line.
Standard
Compare rear-only and both-brake stops at two speeds plus surprise stops.
Harder
Add a braking test on a slight downhill or on gravel to compare traction.
Adaptations
- Limited mobility: the student rides an adapted bike or serves as the pair's measurer and data analyst.
- Hearing impairment: surprise stops always use the visual cone signal.
- Inexperienced riders: ride very slowly and first practice braking from a rolling start.
Learning goals
- Brake effectively using both brakes and good body position.
- Measure and compare stopping distance in different conditions.
- Connect speed and stopping distance to traffic safety.
Equipment for a class of 25
- bikes: 13
- helmets: 13
- cones: 20
- measuring tapes: 5
- chalk: 10
Teacher tip
Request bikes in advance and keep a spare or two; tighten loose brakes yourself before starting. The most common mistake is locking the rear wheel and skidding, so coach smoother squeezes.
PatioLab has "Emergency Bike Braking: Stopping Distance and Brake Balance" and 3999 more activities ready to drag into your lesson and run from your phone in the gym.
More main activities for High School
1-2-3 Touch Cooperative Rally
Two groups of three, one on each side of the net, work together to keep the longest rally possible in three phases: one touch, two touches, and three touches per side.
1-2-3-2-1 Running Pyramid Intervals
An interval workout where the fast segments build from 1 to 3 minutes and back down, with half that time as jogging recovery.
1-on-1 Self-Pass Volleyball
One-on-one games on narrow 10 x 20 foot courts where each player must self-pass before sending the ball over.
10-20-30 interval running in pairs
The 10-20-30 method strings together 30 seconds of easy jogging, 20 at a moderate pace and 10 at top speed, in five-minute blocks.
1v1 Ball Volley Matches
1v1 ball volley: singles games on a small court with a low net, hitting the ball over the net and allowing one bounce.
2-on-1 Fast Break with a Chasing Defender
Two attackers push a fast break against a defender waiting at the basket while a second defender chases from behind with a few yards' head start against them.