Well that depends on how you drive at the moment, if you keep your foot planted when the wheel is spinning then it will shred the tyre, yeah, but if you let off a bit so the tyre can regain grip and do it's job it won't be wearing the tyres that much more.
An open diff (like the standard 306 one) sends torque down the path of least resistance, ie to the tyre with least grip, hence why you'll usually spin the inside wheel up when booting it out of a corner. No grip effectively means no friction, low friction means low tyre wear. The LSD only allows a limited level of torque bias, ie forcing both tyres to work as best they can. This means if the wheels are going to spin they'll both do it, rather than just one. As one of the tyres will be doing it on a grippier surface, that tyre will suffer more wear that it did under the same conditions as before the lsd was fitted.
Chances are you'll also end up carrying more speed through corners and traveling faster before having to brake, therefore working the tyres harder again. The lsd is a performance upgrade dude, as such it'll make other components work harder.
An open diff (like the standard 306 one) sends torque down the path of least resistance, ie to the tyre with least grip, hence why you'll usually spin the inside wheel up when booting it out of a corner. No grip effectively means no friction, low friction means low tyre wear. The LSD only allows a limited level of torque bias, ie forcing both tyres to work as best they can. This means if the wheels are going to spin they'll both do it, rather than just one. As one of the tyres will be doing it on a grippier surface, that tyre will suffer more wear that it did under the same conditions as before the lsd was fitted.
Chances are you'll also end up carrying more speed through corners and traveling faster before having to brake, therefore working the tyres harder again. The lsd is a performance upgrade dude, as such it'll make other components work harder.