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Old 09-04-18, 12:27 PM
  #340  
carleton
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Originally Posted by Morelock
I think the main purpose of the iO RIO was to allow the use of wider tyres without the aero penalty. It would gain you some nonzero bit of crr as well. That said... the old "narrow is aero" matters with the leading tyre... so it's possibly a wash between the two (as the 19mm Vitt is a fast tyre to begin with) especially in the low yaw scenario you'd expect the velodrome to be. Still, wider tyre has a few other benefits when you're looking for every last thousandth of a second.

Fwiw, Josh Poertner found the 5 spokes to be slower than 808's... but, basically they didn't look as cool and so riders didn't like (or ride) them.
Having owned the older IO (like Baby Puke) and 2 sets of 808 track (early model and Firecrest), my anecdotal testing revealed no measurable difference between the two...except in my bank account
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