SeqLite Shimano Ultegra Dura Ace 10 Speed Compatible Alloy Road Cassette

I am a long distance racer (112-3000 mile events), and not a sprinter. So these aluminum babies have survived on my rear wheel for 5000+ miles before the teeth wore to the point of replacement. I finally wore a tooth off one cog on a 750 mile, 40,000 ft climbing race during a steep climb when I shifted into the 27 too late. The manufacturer advertises these for race day-only, but for riders who are spinners, these can be a sub-100 g monobloc solution even for long distances from Ironman to RAAM. I suspect that crit racers or sprinters will want to confine these to race day only, though.

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