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EXOS SETUP: TROUBLE SHOOTING

PROBLEM

POSSIBLE CAUSE

Gear shifts not working

• Derailleur cables sticking,

properly

stretched or damaged

• Front or rear derailleur not

adjusted properly

• Indexed shifting not adjusted

properly

Slipping chain

• Excessively worn or shipped chain

ring or freewheel sprocket teeth

• Chain work or stretched

• Stiff link in chain

• Non-compatible chain, chain ring

or freewheel

Chain jumping off freewheel

• Chain ring out of true

sprocket or chain ring

• Chain ring loose

• Chain ring teeth bent or broken

• Rear or front derailleur side-to-

side travel out of adjustment

Constant clicking noises

• Stiff chain link

when pedaling

• Loose pedal axle, bearings

• Loose bottom bracket axle,

bearings

• Bent bottom bracket or pedal

axle

• Loose crankset

Grinding noise when

• Pedal bearings too tight

pedaling

• Bottom bracket bearings too tight

• Chain fouling derailleurs

• Derailleur jockey wheels dirt

Freewheel does not rotate

Freewheel internal pawl pins are

jammed

SOLUTION

• Lubricate, tighten or replace

Brakes not working effectively

cables

• Adjust derailleurs

• Adjust indexing

• Replace chain ring, sprockets

and chain

When applying the brakes they

• Replace chain

squeal or squeak

• Lubricate or replace link

• Seek advice at a bicycle shop

Knocking or shuddering when

• Re-true if possible, or replace

applying brakes

• Tighten mounting bolts

• Repair or replace chain

ring/set

• Adjust derailleur travel

• Lubricate chain, adjust chain

Wobbling wheel

link

• Adjust bearings, axle nut

• Adjust bottom bracket

• Replace bottom bracket axle

or pedals

• Tighten crank bolts

Steering not accurate

• Adjust bearings

• Adjust chain line

• Clean and lubricate jockey

wheels

Frequent punctures

Lubricate. If problems persists,

replace freewheel

EXOS SETUP: TROUBLE SHOOTING

PROBLEM

POSSIBLE CAUSE

• Brake blocks worn down

• Brake blocks/disc greasy, wet

or dirty

• Brake cables are binding,

stretched or damaged

• Brakes levers are binding

• Brakes out of adjustment

• Brake blocks worn down

• Brake block toe-in incorrect

• Brake blocks/disc dirty or wet

• Brake arms loose

• Brake disc bent

• Brake mounting bolts loose

• Brakes out of adjustment

• Fork loose in head tube

• Axle broken

• Wheel out of true

• Hub comes loose

• Headset binding

• Hub bearings collapsed

• QR mechanism loose

• Wheels not aligned in frame

• Headset loose or binding

• Front forks or frame bent

• Inner tube old or faulty

• Tyre tread, casing worn

• Tyre unsuited to rim

SOLUTION

• Replace brake blocks

• Clean blocks and disc

• Clean, adjust, replace cables

• Adjust brake levers

• Centre brakes

• Replace blocks

• Correct block toe-in

• Clean blocks and disc

• Tighten mounting bolts

• Take to a bike shop for repair

• Tighten bolts

• Centre brakes and/or adjust

brake block toe-in

• Tighten headset

• Replace axle

• True wheel

• Adjust hub bearings

• Adjust headset

• Replace bearings

• Adjust QR mechanism

• Align wheels correctly

• Tighten headset

• Take bike to a bike shop for

possible frame realignment

• Replace inner rube

• Replace tyre

• Replace with correct tyre