Tighten crank arm on Reynolds 531 Hi all,

I've got a Dawes Imperial (Reynolds 531 frame) and the crank arm is loose. None of my standard impact drivers fit. Does anyone know what I need to use to tighten it?

Thanks,
Tim
I'd use a 14 mm socket to undo the nut/bolt.  Then you need a crank puller tool to lever the crank off the bottom bracket axle.

Daniel's point is correct - are you positive its the crank/arm to axle that is loose?  Its more common to have misadjusted bearing cup/cones in the bottom bracket, and the whole pedal-structure wobbles.