[QUOTE 5524459, member: 9609"]how do they work on clear roads ?
I may of done 15 on snowy roads and 20 on clear today.
and since I use marathon pluses that are not too much fun to take on and off, would I have to invest in two new wheels as well.[/QUOTE]
They work well, if noisy. I have two types, 100 spikes per wheel on Snow Studs, so an MTB tyre with studs on the edges - grip fine, and Ice Spiker Pro - these are serious bits of kit, with 360+ spikes per tyre. Roll well enough as I set a second fastest 'tarmac' climb on them last week, but they are incredibly noisy. You have to ease off a little on tarmac when cornering as they can squirm a bit. But, Saturday's descent on a very rough bouldered bridleway which was an icy river was incredible - 100% grip - more so than the poor walkers had.
Schwalbe do a marathon winter whice is better for hybrids/wide tyred road bikes.
I went out in the ice for fun - 100% safe, and to smile to myself when walkers were astonished I was upright as they slid past.