Winter Cycling - Schwalbe Ice Spikers...any coments?

Has anyone tried the Schwalbe Ice Spiker 2.1" studded tire (304 studs!)? MEC (Mountain Equipment Co-Op....a CDN shop) has them for $96CDN/tire. Weight is ~1015g/tire (verified on a digital scale). Available only in wire bead. Here's a pic:

http://www.schwalbetires.com/TireImages/Large%20Tire%20Images/l_ice_spiker.gif

Schwalbe has them listed for $84 US (~$110CDN).

They look surprisingly similar to the Nokian Hakka WXC300 (which are ~$95US/tire).

http://gallery.consumerreview.com/webcrossing/images/wxc300.jpg

Weight on the Nokians is a svelte 695g/tire. Unfortunately, I've spoken with several WXC300 users who've had problems with loosing the studs from their tires. One indicated loosing 50+ studs from one tire! Ouch! Considering there are 300 studs, that's 1 in 6...not good, especially considering the price.

I was going to make my own set using a set of IRC Mythos 2.1" (580g front; 536g rear). Any idea what ~300 #8 3/8" sheet metal screws weigh? Also, I would need to line the tires with another tube....160g/tube. Just curious how close the two sets would be?

Also, the Schwalbes come with puncture protection.

Ride Hard,
Mike B.
http://www.one-speed.com

I saw them,they look great(schwalbe)but cost too much for my budget.
But they inspired me to create my own custom winter tires with a pair of maxxis mobsters that came with my bike(but you can use canadian tire cheapies as well) .A co-rider and i just finihed a rather agressive tire made with 10-32 1/2 inch metal screws.We grinded every screw,punctured the crampons according to the desired pattern and added some bolts.The protection layer inside the tire is duct tape.It took about an hour 1/2 for each tire,cost 10$ or so per tire... and believe me,they make your bike stick to the ice.On top of that they look way sexy!

by the way, you dont need 300 spikes, 90 or so per tire is enough...i dont know about the weight,i use alumnium screws.