Can anyone settle an arguement we had during a wet break at school!
Does a MRP chain device come with a chain ring?
and can you use it with 4 bolt cranks?
thanks rob

The outer bash plate is bolted to the crank spider so you need to specify 4 bolt when you order an mrp chain device but you CAN get it in 4 arm, you need to get the chain ring seperately though.

doesnt come with a chain-ring

Blackspire does though