Bicycle Mechanics and Repair DecalMechanical Engineering 98/198
Spring 14
Lecture 3 – staaaahp it
Components
Lever
Caliper
Cables
Caliper
Main Brake Types - Side Pull Brakes
Dual Pivot Single Pivot
Main Brake Types - Center Pull Brakes
Cantilever U Brake
Main Brake Types - V Brakes
Dual Pivot Brakes in Detail
Other Types of Brakes
Brake Cable FunctionConnects brake lever to brake
Cable
Inner Sleeve
Steel Structure
Plastic Coating
Replacing Brake CablesReplacement Cable Should have the same “Nipple”
Pear – Road Bikes Standard – Mountain Bikes
Do Not Confuse Brake and Gear Housing!!!!
Before Adjusting Your Brakes
Wheel must be centered in the fork.
Wheel must be true(no wobble side to side when rotated)
Aligning Brake Pads
Make sure the pad is centered in relation to the rim.
Brake Toe-In
To prevent brake squeal and ensure even contact, angle the pads towards the direction of rotation of the wheel(front of bike).
Use a dime or a credit card to help set the gap.
When to Replace Pads
Metal shards embedded in pad rubber
Step worn into pad
When To Replace Brake Pads
Check the grooves to see when brakes should be replaced.
New!!Safe!!Awesome!!!
Worn. Needs to be Replaced!
Maintaining Brake Pads
• Keep both the rims and brake pads clean Remove and large
particles Sand brake pads Clean Rims with
degreaser
Don’t use oil or grease!!
Disc Brakes!Mechanical Hydraulic
Cable activated Fluid Activated
Features of Disc Brakes
- Hub mounted disc
- Frame or fork mounted
caliper
- Pads squeeze the hub
mounted disc through
mechanical pull or fluid
pressure
- Kinetic energy gets turned to
thermal energy through
friction!
- More power than rim
brakes
- Work in all weather
conditions
- Also heavier than rim
brakes
- Gives you mad power at
the lever!!! MOAR
POWER!
Braking Tips…
... So this doesn’t happen to you
Tips
Cornering: Use both brakes
Emergency Braking Mostly front brake! Lean back!
Front Brake: 95% of braking power
Rear Brake: Use on slippery surfaces and when turning