Mens Newton Running Sir Isaac Running Shoe at Road Runner Sports
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Mens Newton Running Sir Isaac Running Shoe

Men's Newton Running Sir Isaac

Item #NWT108
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Product Description:

Men's NEWTON® RUNNING SIR ISAAC :: A running shoe so smart, Sir Isaac Newton himself would be impressed. The Newton® Running Sir Isaac guidance trainer is a neutral shoe with some pronation support for those who need it. The genius of this running shoe is that it intuitively guides your running form into the more efficient midfoot/forefoot running style. 10.9 ounces

Features & Benefits:

  • Beveled heel and toe: Helps guide runner easily into the midfoot/forefoot
  • Beveled lugs: Smoother, stable feel that is more gradual in the forefoot
  • Wider midfoot/forefoot and lugs: Adds stability and creates a softer feel
  • Midfoot Chassis/Shank: Adds support and stability
  • Carbon rubber outersole: Increases durability
  • Closed mesh on upper: Highly breathable, fast-drying, keeps small debris out
  • Single-density, high rebound EVA: Stabilizes all foot types
  • Forefoot Action/Reaction Technology™: Absorbs and then returns your own energy back to you allowing a boost of forward energy with every single stride you take
  • Midfoot/rearfoot support chassis: For added stability
  • Enhanced sock-liner: Increases energy return and protection
Product NWT108 Review


  • Country of Origin: China

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1.    Mike rated this product 5 stars
Wed, January 27,2010:
Awesome shoe! Wider toebox than the S Racer and the updated lug shape and pattern give you more traction and take much less milage to break in. A bit more rigid than the originals, but more comfortbale and versitile. Definitely worth the investment for midfoot and forefoot strikers.
2.    derhammer rated this product 5 stars
Thu, December 10,2009:
I really like these shoes. The workmanship is top-notch - they use high quality materials. I have worked up to 10 mile runs in these, and use them for my tempo stuff as well. I still get a bit of calf soreness but that is slowly going away. These have really helped me perfect my midfoot strike and I find myself running with better form in my other "non Newton" running shoes that I use for long runs. I hope that with time I will be using the Newtons in all my runs.
3.    George rated this product 5 stars
Sun, November 15,2009:
Great shoe. Bit wider in the rear than the other model they have. Really helped my knee which was sore all the time. Legs feel less tired after the run. I have only been running in these shoes and think after 32 years of running I finally found shoes that work.
4.    DS rated this product 5 stars
Fri, October 30,2009:
I went through 3 pairs of running shoes before I tried these. All the previous ones (NB, Nike and Asics) caused me some extent of knee pain after running no amount of cushioning helped. It was determined that I was a heel striker and Newton was recommended. I have to tell ya, these absolutely did the trick! I have no residual effects from impact and running has again become a pleasure. They do take a little getting used to, but the rewards in my case are worth a mint! With Roadrunner's exchange policy, these are definately the shoes to try!
5.    III rated this product 5 stars
Thu, October 29,2009:
Excellent. After running in these i can't run in any other shoe. These make all other shoes feel unnatural.
6.    JRW rated this product 5 stars
Wed, October 07,2009:
Started wearing these about 3 weeks ago. I followed the adjustment recomendations carefully as I was recovering from calf/solius strain. They fit well (true to size). I have always been more of a midfoot striker, so my adjustment went well. So far I have run up to 10 miles with no problems. I don't know if all the hype is accurate, but I really like the forefoot cushioning. Most running shoes emphasize heel cushioning and lack forefoot cushioning. So far they seem to be excellent shoes. I plan to try the winter shoe that is coming out next month and will likely consider the light weight performance shoe for races and triathlons next summer.
7.    z-man rated this product 5 stars
Sat, October 03,2009:
This shoe is my third pair from Newton. I bought this shoe mainly for a long distance shoe. They are very comfortable. The toe box seems a little bigger than the other designs. Since the heel is thicker than the other models, don't notice the lugs as much. My second run was a 10 miler...wanted to go longer but had to get to work. Ever since using Newtons, my legs don't feel as sore. Forefoot runners should definitely look into these shoes.
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You're not done yet! Complete your fit!

"Best Insoles Ever!"

R-Gear QuickFit Insole

Price: $49.99

VIP: $44.99

  • Deep heel cup: Features the widest and deepest heel cup that offers maximum support and positions the soft tissue to help with natural shock absorption
  • Biomechanical shape
  • High-density foam: Closed-cell foam supports and cushions the foot for long lasting comfort
  • Odor-control coating: All natural coating that eliminates odor-causing bacteria
  • Stabilizer cap: The base of the insole that supports the rear foot and provides structure and stability to the foam layer


  • Quantity: