Have one of those bell compasses , its crap, I know where north is, at home, and it never did.
Just wrong from the start.

Question is how well does it work after being close to all those steel things around it on the bike, bolts and such.?


Used a Silva compass I could take away from the bike with the map, to get a better reading .

on the bike I have a ball shaped clip on compass, secured it better by sticking on a bit of velcro
on the back of the clip and sewing on a matching patch of velcro on the bag..