Originally Posted by
gios
See I have this figured it out. An 11-34 cassette is a eleven speed (11 cogs in the rear) with a 34T as the biggest cog (34 tooth cog)?
It was annotated on my 105 chainring: 53/39. Cassette is an 8 speed.
11-34 is the gear ratio so an 11 tooth small sprocket and 34 large sprocket. It could be in a wide variety of cog numbers probably 7 speed on up to 12 speed though.