Cyseekin E-Bike Blog

E-Bike Pflege
Person zeigt auf den engen Spalt zwischen Vorderreifen und Schutzblech

Fender rubbing against the tire: systematically identify the cause

If the mudguard is rubbing, first check the wheel, tire, and any foreign objects. Then check the stays, clearance, and designated adjustment points.

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E-Bike Pflege
Durchhängender unterer Kettenstrang an einem abgestellten Singlespeed-Rad

Bicycle chain sagging: Find the cause based on the drivetrain system

Chain slack has different causes with derailleur gears, hub gears, and single-speed bikes. Here’s how to safely check the guide, tensioner, and wheel position.

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E-Bike Pflege
Person kontrolliert den Sitz eines Fahrradreifens an der Felge

Bicycle tire not seated correctly: Check the bead and rim seat

An uneven tire bead can cause a bulge or radial runout. Here’s how to safely check the size, inner tube, rim tape, and molding line.

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E-Bike Pflege
Person prüft beide Kurbelarme an einem Fahrrad im Montageständer

Loose bicycle crank: assess the play and prevent damage

Noticeable crank play calls for a stop. Here’s how to distinguish between the pedal, crank arm, and bottom bracket and avoid tightening the wrong component.

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E-Bike Pflege
Person prüft ein ausgeschaltetes Display an einem abgestellten E-Bike

E-bike display won’t turn on: Check the external power supply

If the e-bike display stays black, safe external checks of the battery, charging process, control unit, and cables can help—without opening the housing.

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E-Bike Pflege
Radfahrer prüft eine gerissene Kette am sicher abgestellten E-Bike

Bike chain broken: Stop, inspect the damage, plan your way home

If your bicycle chain breaks, stopping safely comes first. Here’s how to check for consequential damage, assess an emergency repair, and plan your journey home.

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E-Bike Pflege
Person prüft ein eingebautes Vorderrad mit beiden Händen auf seitliches Spiel

Bicycle hub has play: understanding wheel wobble

If the wheel wobbles, the bearing isn’t necessarily the cause. Here’s how to reliably distinguish between axle seating, hub play, rim runout, and brake contact.

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E-Bike Pflege
Person prüft einen entnommenen E-Bike-Akku neben der leeren Akkuaufnahme

E-bike battery not charging: Safe inspection without opening

If the charger or battery remains unresponsive, safe external checks are better than opening them or improvising. This helps narrow down whether the issue is with the connection, temperature, or a defect.

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E-Bike Pflege
Fachperson prüft Schaltwerk und Schaltauge eines Fahrrads in der Werkstatt

Bent derailleur hanger: Recognize the symptoms and protect the rear derailleur

Does your bike suddenly shift poorly after a fall or during transport? Here’s how to identify a bent derailleur hanger and prevent damage to the spokes and derailleur.

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