Bontrager Releases “Fastest” Road Tire Ever

bontrager-aero-tireBontrager has released their new Race X Lite Aero TT tire, specially designed with a unique wing design to improve airflow over the tire-rim surface and reduce speed-sucking turbulence. The dual compound silica/carbon blend claims to provide “incredible performance and longevity.”

At 17 mph (with a 10mph headwind) it starts to shave seconds off your ride compared to the next best-in-class tire, to the tune of:

  • 6.37 seconds in a 10k time trial
  • 31 seconds in a 40k time trial
  • 183 seconds (more than 3 minutes) during an Ironman cycling leg.

This translates into quicker time trials, more energy after the cycling stage of a triathlon or your fastest commute ever.

Click on the image to enlarge for detail, or read “more” to see sizes, pricing and some fancy science charts…

Available in Clincher only for fast riders like you in the following sizes:

  • 650 x 23 (180g)
  • 700 x 19 (180g)
  • 700 x 23 (195g)
  • 700 x 25 (200g)

All tires have Aramid beads with 120 TPI casings and MSRP for $59.99.  Here’s why they say it’s the fastest:


If you’re the super-human type that can hold upwards of 27mph, then perhaps the Michelin ProRace may offer you a slight advantage.  For the rest of us, the Bontrager takes the lead.  Note the testing scenario…this is for a headwind angle of only 0º to 10º, meaning it’s either a calm day and you’re creating the wind over the tires purely by pedaling, or the wind is coming straight at you.


The orange fuzzy stuff is presumably the air turbulence caused by other tires at the rim’s edge, whereas the Bonty forms a nice smooth edge for the wind to slip around.

What’s not disclosed about the test, though, is what type of rim was used, leaving one to ponder whether there would be a significant change in the advantage from a deep “V” aero rim versus a standard rim.


[…] R4 Aero continues it’s title as the World’s Fastest Tire, this time upping the ante with a new rounded profile and 22c width, 62A durometer rubber and a […]

Jase - 04/18/10 - 11:46am

In the “Total Drag Force” chart, the Michelin is the WORST (most drag) above 27mph, not the best. That paragraph makes no sense.

Jase - 04/18/10 - 11:49am

In that “total drag force” chart, the Michelin is the WORST (most drag) over 27mph, not the best. The Bontrager us best at all but the lowest speeds.

Post a comment:

Comment sections can be a beautiful source of knowledge, conversation and comedy. They can also get pretty ugly, which is why we've updated our Comments Policy. If your comment isn't showing up or suddenly disappears, you might want to check it out.