Bicycle Mechanics and Repair Decal Mechanical Engineering 98/198 Spring 14 Lecture 3 – staaaahp it

Components Lever Caliper Cables Caliper

Main Brake Types - Side Pull Brakes Dual PivotSingle 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 Function Connects brake lever to brake Cable Inner Sleeve Steel Structure Plastic Coating

Replacing Brake Cables Replacement Cable Should have the same “Nipple” Pear – Road BikesStandard – 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! MechanicalHydraulic Cable activatedFluid 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