I have some of those cheap shimano mtb spd's. 8 months usage or so and even with the screws tightened right up they unclip if I pull up sharply on them. If I buy a more expensive shimano spd will they hold tighter, or I need to buy those other ones that fixie skidders all seem to use (time atac?)?
Which cleats? The multi-release ones will unclip if you pronate/supinate, if they are the problem then you can usually fix it just by switching to the single-release cleat.
I have some of those cheap shimano mtb spd's. 8 months usage or so and even with the screws tightened right up they unclip if I pull up sharply on them. If I buy a more expensive shimano spd will they hold tighter, or I need to buy those other ones that fixie skidders all seem to use (time atac?)?