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Contrail – Biking Community Tool

Contrail – Biking Community Tool

Contrail - Biking Community Tool (Images courtesy Studio Gelardi)
By Andrew Liszewski

A few months ago we brought you the Light Lane concept which attaches to the back of a bike creating a virtual light-up lane on the road’s surface, supposedly making riding at night a bit safer. Well the Contrail is a similar idea, but better suited for daytime rides. The concept was created by Studio Gelardi, and it consists of a small apparatus that applies a thin layer of colored chalk to a bike’s tire. As you ride, the chalk is transferred to the road, leaving a colorful trail behind you. Over time these trails on the road get more pronounced, which not only encourages other bikers to take the same route, but it also lets drivers know what roads are frequented with bike traffic, hopefully making them a bit more cautious.

[ Contrail – Biking Community Tool ] VIA [ Josh Spear ]


14 responses to “Contrail – Biking Community Tool”

  1. Blairf Felgenheimer says:

    I bet they cant wait to sell a bunch of these to find out that theres dozens of laws on the books regarding the unauthorized marking of city streets. This probably was given the same thought as their ” go grab a can of spray paint and advertise where-ever-the-hell you feel like it ” campaign.

  2. Mike says:

    Just don't ever use it when the road is wet, or ride through puddles–marking chalk is INCREDIBLY messy, and unless you're a geek riding a bike with fenders, chalk spray WILL cover you. What a friggin' mess!

  3. web design says:

    WOW! Road is looking very colorful, anyway it is nice concept as it encourages other bikers to take the same route where you are going but as you told it is suited for daytime rides only.

  4. popoamel says:

    Wow–reminds me that I had the same idea years ago to do the same thing but for skiing. Trailing a water-based, non-toxic ink from small reservoirs in the back of skis.

  5. Gourry says:

    Graffiti is graffiti.

  6. Matt says:

    Also has anybody taken into account chalk's funny little habit of lowering the friction between two objects? Like, oh I don't know, a tire and a road?

  7. Gad says:

    ? ?? ????? ?? ?????? ?????!

  8. night_panda says:


  9. kday says:

    love it! beautiful. admittedly i am a geek who rides with fenders most of the year…

  10. azamat says:

    Please tell me where can buy it?

  11. conan776 says:

    Is this a real thing yet??

  12. conan776 says:

    Is this a real thing yet??

  13. SauronHimself says:

    Meh, it’s another solution in search of a problem.