Right, I need some help with chainring offsets please.
Want to put a shorter crank on my new Cotic Rocket Max, Cotic states:
Chainline: 52mm Shimano / 53mm Boost chainline for up to 32t round/30t oval chainring,
I've seen a crankset that is either 50 or 53mm chainline and takes a Sram 3 bolt chainring, which most seem to be 3mm or 6mm offset.
From what I've read offset is inboard, so if I put a 3mm offset chainring on the crank set with 53mm chainline does that end up as 50mm and therefore NOT compatible with my bike?
Or can I put one on the 50mm CL crank backwards and get 53mm....
🤯
Typically, Shimano control offset with axle length.
Typically others have a standard crank and control offset with the ring. It's likely that the 53mm is a 3mm offset ring and the 50mm is a 6mm off set ring, both starting from the same place. However, SRAM can be a minefield and it can vary by bottom bracket type
Typically, Shimano control offset with axle length.
Typically others have a standard crank and control offset with the ring. It's likely that the 53mm is a 3mm offset ring and the 50mm is a 6mm off set ring, both starting from the same place. However, SRAM can be a minefield and it can vary by bottom bracket type
What Onzadog says…
Though it always used to be that a 6mm offset ring gave 49mm chainline, a 3mm gave 52mm and a flat ring 55mm with SRAM… That is until they buggered around further outboard with the latest T-Type stuff chainline wise.
Shimano have typically changed the offset with a longer axle as previously stated, so you need to change cranks with Shimano to change the offset, but only need to change chainring with SRAM to change it…
Ah so if I bought the 53mm CL crankset and swapped the 32 tooth chainring it comes with for a 3mm offset 30 tooth it would remain a 53mm CL and be bang on the CL Cotic recommends?
Cool, think I get it now. Basically I don't want to spend a fortune at the moment and buy Hope 155 cranks, but have found some Cube own brand ones that come in 160mm for not much money, so fancy giving them a try for a while and see I get on.
Cheers both.
Very likely but the reason for liberal use of the term "typically" is because not everyone plays by the rules, sometimes not even their own rules
Cool, makes sense though so I might give it a go. Cranks are only £60.