Need More Grip? Check Out the Latest Extreme Performance Summer Challengers to the Bridgestone Potenze RE-71R

Becoming number one is difficult, but staying on top is even harder. Currently, the Bridgestone Potenza RE-71R has managed to hang on to its Extreme Performance Summer crown, however the competition is getting fierce. BFGoodrich has the new g-Force Rival S 1.5. Falken has come out with the RT615K+. And Hankook has rolled out the Ventus R-S4.

Extreme Performance Summer BF Goodrich g-Force Rival S 1.5
BFGoodrich g-Force Rival S 1.5
Extreme Performance Summer Falken Azenis RT615K+
Falken Azenis RT615K+
 Extreme Performance Summer Ventus R-S4
Hankook Ventus R-S4

BFGoodrich g-Force Rival S 1.5

The g-Force Rival S 1.5 is an update to the g-Force Rival S. The g-Force Rival S has always boasted great lateral grip, but many drivers found its steering response to be a bit vague compared to the Bridgestone Potenza RE-71R. BFGoodrich updated the Rival S's construction to improve feel and responsiveness. The update focused on all the three-rib (255 section width and narrower) versions of the tire.

While there is not a “1.5” designation on the tire's sidewall, it's still easy to spot a Rival S 1.5 compared to the standard Rival S. Just check the speed rating branded on the sidewall at the end of the Service Description. All Rival S tires feature a W-speed rating, while Rival S 1.5 tires are V-speed rated. Additionally, Rival S 1.5 tires can be identified by the Sizing System. All Rival S tires are P-metric, and Rival S 1.5 tires are all Euro-metric. Finally, all Rival S tires are Light Load tires (with the exception of P205/50R15), whereas Rival S 1.5 tires are all Standard Load.

  g-Force Rival S g-Force Rival S 1.5
Speed Rating on Sidewall W V
Sizing System P-Metric Eurometric
Load Rating Light Load (except P205/50-15's are Standard Load) Standard Load


Falken's internal testing shows a measurable improvement in dry grip for the RT615K+ compared to the Azenis RT615K. The RT615K+ impressed during our brief introductory test. We're looking forward to quantifying that improvement and assessing its overall performance during our summer testing.  


Likewise, Hankook's tire engineers have seen a big improvement in dry lap times with the R-S4 compared to the R-S3. They have also noticed measurable gains in wet grip. It's another tire that we can't wait to test.

Until we complete our comprehensive comparison test in May or June, the Bridgestone Potenza RE-71R remains the most proven Extreme Performance Summer choice for combining steering response and grip. Will it keep it's crown? We'll see. Be on the look out for updated test results.


Wednesday, August 2, 2017 by CRX Don

Here's my experience from a PTE class CRX: The RS4 is a great tire in dry conditions, but a bit slower than the RE71R. The RS4 and new 615K+ are about equal in dry conditions. However in the wet the RS4 is an inferior tire. The RS4 wears better than the RE71R or 615K+, but I did experience some chunking. My car never chunks tires so this was a bit of a surprise, hopefully I can prevent that next time with improved camber settings. Overall the RS4s are a good tire and good value (assuming the new camber settings prevent chunking), but if you want to win races you will need to have another set of tires for rain.

Leave a comment