|Options||13t (3-spline) (in store)
14t (3-spline) (in store)
13t (9-spline) (in store)
|Description||All these are for a 3/3nd chain (modern 8 speed one).
If you have an older Brompton with the wider 1/8th sprocket you can still use this sprocket but you will need to fit a 3/32nd chain.