Came across a triban 500 sora cycle on ebay snag is on riding the crank is rough in lower gears it has 9 the se uk model has 8 the cy

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Nightjar

New Member
Secured a triban 5 sora cycle ebay snag is sora has 9 speed cassette the cranks grinds noticeabley in Lower gears the cycle has a bottom bracket of 8 speed I'm thinking replacing BB should rectify however why was 8 BB installed
 

Cycleops

Legendary Member
Location
Accra, Ghana
Hello and :welcome: .

Never heard of a 8 speed BB, or do you mean 8 speed chainrings or chain? BB is the spindle and bearings the cranks are attracted to, they are not speed specific.
Grinding could be due to any number of things. Can you feel play in the BB if you rock the cranks from side to side? Could be worn chain rings or chain, Any chain slip?
Could you post a pic of the bike from the drive side?
 
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Something about the bb/chainset doesn’t look right, it’s overlapping the HT2 bearing cups (or is that’s because it’s a triple), spacer on incorrect side?
 

notmyrealnamebutclose

Senior Member
Does he mean the smolest cog as that would make some sense?
 
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