Before the invention of motorized bicycles, thrill seekers resorted to steam-powered roller skates and trampoline-powered unicycles. Cheer on extreme transportation with today’s Groupon: for $20, you get admission for four to watch a practice or race at Sunshine Motocross in Clearwater (up to a $40 value).

For 50 years, rough riders and their two-wheeled steeds have torn up the track at Sunshine Motocross. Today’s deal grants gear heads admission to any scheduled race or practice along the 1.5-mile track, as growling 85 cc and 125 cc bikes shred clay, sand, and hardpack as they compete for the end-of-season trophy and celebratory motor-oil showers. The spring/summer series runs through August 13, affording race-goers plenty of time to catch this Spartan spectacle of flying mud, motors, and spectators’ sandwiches.

Although this Groupon does not cover racing fees, speed racers with their own dirt bikes or ATVs can race the track for an extra charge.