Thread: pollution masks
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Old 11-01-04 | 04:47 PM
  #4  
CdCf
Videre non videri
 
Joined: Sep 2004
Posts: 3,208
Likes: 4
From: Gothenburg, Sweden

Bikes: 1 road bike (simple, light), 1 TT bike (could be more aero, could be lighter), 1 all-weather commuter and winter bike, 1 Monark 828E ergometer indoor bike

Pressure ventilation...
A pump driven by pedal power, forcing air through the filter...
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