Leave your worries in the rearview and settle in your zen run zone in the Nike InfinityRN 4. Updated with the best Flyknit technology yet and soft, responsive React foam underfoot. They're engineered to be the zero stress trainer you put on without a thought, just step out the door and start running.
Leave your worries in the rearview and settle in your zen run zone in the Nike InfinityRN 4. Updated with the best Flyknit technology yet and soft, responsive React foam underfoot. They're engineered to be the zero stress trainer you put on without a thought, just step out the door and start running.
in 2 offers
The lowest price for Nike InfinityRN 4 Mens Running Shoes Blue US 9 right now is $120.00 at shoegrab.com.au, compared across 2 retailers.
The all-time low was $120.00 on 31 Aug 2025. That's the lowest price we've ever tracked ā a great time to buy.
Prices last updated 8 May 2026.
Nike InfinityRN 4 Mens Running Shoes Blue US 9
Leave your worries in the rearview and settle in your zen run zone in the Nike InfinityRN 4. Updated with the best Flyknit technology yet and soft, responsive React foam underfoot. They're engineered to be the zero stress trainer you put on without a thought, just step out the door and start running.
Leave your worries in the rearview and settle in your zen run zone in the Nike InfinityRN 4. Updated with the best Flyknit technology yet and soft, responsive React foam underfoot. They're engineered to be the zero stress trainer you put on without a thought, just step out the door and start running.
Last updated at 08/05/2026 10:16:07
Menās Nike React Infinity 4 (Bulldogs) 9
Free delivery between Tue ā Thu
Nike InfinityRN 4 Mens Running Shoes Blue US 9
Free delivery between Tue ā Thu
originally posted on sportsdirect.com
I picked up a pair of these to replace my Pegasus 40's on regular training runs and must say I'm really pleased with them.What are they like to wear?They seem ideal for easy paced training runs and are cushioned enough for regular use, really "taking care" of your feet. They feel very stable underfoot with a nice heel to toe rocking motion and good grip which seems, to me at least, to encourage better running form.What about the fit?It was recommended to go up half a size and I'm glad that I did. Nike are usually spot on size wise but these do feel fairly closed in around the toes and the upper is snug against the foot.Anything else to note?That snug upper does make these Infinity Run Flyknit 4's a warm shoe. Not overly so but worth noting.Final ...Ā MoreI picked up a pair of these to replace my Pegasus 40's on regular training runs and must say I'm really pleased with them.What are they like to wear?They seem ideal for easy paced training runs and are cushioned enough for regular use, really "taking care" of your feet. They feel very stable underfoot with a nice heel to toe rocking motion and good grip which seems, to me at least, to encourage better running form.What about the fit?It was recommended to go up half a size and I'm glad that I did. Nike are usually spot on size wise but these do feel fairly closed in around the toes and the upper is snug against the foot.Anything else to note?That snug upper does make these Infinity Run Flyknit 4's a warm shoe. Not overly so but worth noting.Final thoughts?This is a fantastic choice for your day to day training runs and feels very capable of eating up the miles. Lace 'em up and off you go! Highly recommended.
originally posted on store.nike.com
I like this generation, but Iām a bigger fan of the Infinity 2 for reasons that may or may not be important to you. Regardless itās a very worthy shoe.Iām generally not a fan of flyknit for any athletic shoe due to the lack of support. While very comfortable, you can really only run in a straight line. Tight turns are totally out of the question and even moderate curves I can still feel my foot sliding in the shoe and edging toward a rolled ankle. The 2 also had a supple upper, but there was definitely more support, so turns were much more manageable. I absolutely would not ever recommend taking these on trail runs. I think youāre asking for trouble if you do.I like the soles on these better than the 2, though. Full sheet of rubber coverage on the bottom with ...Ā MoreI like this generation, but Iām a bigger fan of the Infinity 2 for reasons that may or may not be important to you. Regardless itās a very worthy shoe.Iām generally not a fan of flyknit for any athletic shoe due to the lack of support. While very comfortable, you can really only run in a straight line. Tight turns are totally out of the question and even moderate curves I can still feel my foot sliding in the shoe and edging toward a rolled ankle. The 2 also had a supple upper, but there was definitely more support, so turns were much more manageable. I absolutely would not ever recommend taking these on trail runs. I think youāre asking for trouble if you do.I like the soles on these better than the 2, though. Full sheet of rubber coverage on the bottom with thin nubs for extra wear resistance. The 2 has a cool design on the sole, but I knew I was going to wear through, which I eventually did. I think these will last quite a bit longer.Lastly, the Infinity 2 had a rounder shape to the foam in the sole that lent itself to rolling weight transfer if you ever find yourself heel striking. The 4 also has a round shape, but the center has a longer flat patch which feels more stable. Not sure Iād call it better or worse, just different.Either way, these are still great running shoes and looking forward to logging a few hundred miles on āem
originally posted on dickssportinggoods.com
I started wearing NIKE last year after developing Achilles tendinosis and all the other shoes just didn't work without adding a heel lift or insole. Started with ZoomX Invincible just a hail mary. Ohmygosh! Made running more enjoyable again. Found about this InfinityRN on IG. Ordered a pair on sale just to try in normal running size W 9.5. Did well on short runs up to 6 miles. Started getting numbness and tingling. Came and tried a W 10 and M 8.5. Ordered both to give a try. I mean they are nice colorways for walking around and recovery š . Training for a Full marathon and think I am sticking with the M 8.5!! I like way the hug my feet without added pressure from swelling. I think the upper could be a bit more breathable. The midfoot and heel are supportive. ...Ā MoreI started wearing NIKE last year after developing Achilles tendinosis and all the other shoes just didn't work without adding a heel lift or insole. Started with ZoomX Invincible just a hail mary. Ohmygosh! Made running more enjoyable again. Found about this InfinityRN on IG. Ordered a pair on sale just to try in normal running size W 9.5. Did well on short runs up to 6 miles. Started getting numbness and tingling. Came and tried a W 10 and M 8.5. Ordered both to give a try. I mean they are nice colorways for walking around and recovery š . Training for a Full marathon and think I am sticking with the M 8.5!! I like way the hug my feet without added pressure from swelling. I think the upper could be a bit more breathable. The midfoot and heel are supportive. Definitely responsive. I am heavier about 200lbs and don't feel like the cushion wears away fast. I do rotate ny women's for shorter runs and men's for longer. Oh bought the Gortex model too!
Menās Nike React Infinity 4 (Bulldogs) 9
Free delivery between Tue ā Thu
Nike InfinityRN 4 Mens Running Shoes Blue US 9
Free delivery between Tue ā Thu
I picked up a pair of these to replace my Pegasus 40's on regular training runs and must say I'm really pleased with them.What are they like to wear?They seem ideal for easy paced training runs and are cushioned enough for regular use, really "taking care" of your feet. They feel very stable underfoot with a nice heel to toe rocking motion and good grip which seems, to me at least, to encourage better running form.What about the fit?It was recommended to go up half a size and I'm glad that I did. Nike are usually spot on size wise but these do feel fairly closed in around the toes and the upper is snug against the foot.Anything else to note?That snug upper does make these Infinity Run Flyknit 4's a warm shoe. Not overly so but worth noting.Final ...Ā MoreI picked up a pair of these to replace my Pegasus 40's on regular training runs and must say I'm really pleased with them.What are they like to wear?They seem ideal for easy paced training runs and are cushioned enough for regular use, really "taking care" of your feet. They feel very stable underfoot with a nice heel to toe rocking motion and good grip which seems, to me at least, to encourage better running form.What about the fit?It was recommended to go up half a size and I'm glad that I did. Nike are usually spot on size wise but these do feel fairly closed in around the toes and the upper is snug against the foot.Anything else to note?That snug upper does make these Infinity Run Flyknit 4's a warm shoe. Not overly so but worth noting.Final thoughts?This is a fantastic choice for your day to day training runs and feels very capable of eating up the miles. Lace 'em up and off you go! Highly recommended.
I like this generation, but Iām a bigger fan of the Infinity 2 for reasons that may or may not be important to you. Regardless itās a very worthy shoe.Iām generally not a fan of flyknit for any athletic shoe due to the lack of support. While very comfortable, you can really only run in a straight line. Tight turns are totally out of the question and even moderate curves I can still feel my foot sliding in the shoe and edging toward a rolled ankle. The 2 also had a supple upper, but there was definitely more support, so turns were much more manageable. I absolutely would not ever recommend taking these on trail runs. I think youāre asking for trouble if you do.I like the soles on these better than the 2, though. Full sheet of rubber coverage on the bottom with ...Ā MoreI like this generation, but Iām a bigger fan of the Infinity 2 for reasons that may or may not be important to you. Regardless itās a very worthy shoe.Iām generally not a fan of flyknit for any athletic shoe due to the lack of support. While very comfortable, you can really only run in a straight line. Tight turns are totally out of the question and even moderate curves I can still feel my foot sliding in the shoe and edging toward a rolled ankle. The 2 also had a supple upper, but there was definitely more support, so turns were much more manageable. I absolutely would not ever recommend taking these on trail runs. I think youāre asking for trouble if you do.I like the soles on these better than the 2, though. Full sheet of rubber coverage on the bottom with thin nubs for extra wear resistance. The 2 has a cool design on the sole, but I knew I was going to wear through, which I eventually did. I think these will last quite a bit longer.Lastly, the Infinity 2 had a rounder shape to the foam in the sole that lent itself to rolling weight transfer if you ever find yourself heel striking. The 4 also has a round shape, but the center has a longer flat patch which feels more stable. Not sure Iād call it better or worse, just different.Either way, these are still great running shoes and looking forward to logging a few hundred miles on āem
I started wearing NIKE last year after developing Achilles tendinosis and all the other shoes just didn't work without adding a heel lift or insole. Started with ZoomX Invincible just a hail mary. Ohmygosh! Made running more enjoyable again. Found about this InfinityRN on IG. Ordered a pair on sale just to try in normal running size W 9.5. Did well on short runs up to 6 miles. Started getting numbness and tingling. Came and tried a W 10 and M 8.5. Ordered both to give a try. I mean they are nice colorways for walking around and recovery š . Training for a Full marathon and think I am sticking with the M 8.5!! I like way the hug my feet without added pressure from swelling. I think the upper could be a bit more breathable. The midfoot and heel are supportive. ...Ā MoreI started wearing NIKE last year after developing Achilles tendinosis and all the other shoes just didn't work without adding a heel lift or insole. Started with ZoomX Invincible just a hail mary. Ohmygosh! Made running more enjoyable again. Found about this InfinityRN on IG. Ordered a pair on sale just to try in normal running size W 9.5. Did well on short runs up to 6 miles. Started getting numbness and tingling. Came and tried a W 10 and M 8.5. Ordered both to give a try. I mean they are nice colorways for walking around and recovery š . Training for a Full marathon and think I am sticking with the M 8.5!! I like way the hug my feet without added pressure from swelling. I think the upper could be a bit more breathable. The midfoot and heel are supportive. Definitely responsive. I am heavier about 200lbs and don't feel like the cushion wears away fast. I do rotate ny women's for shorter runs and men's for longer. Oh bought the Gortex model too!
The Nike React Infinity Run FK 4 is a great new vision in running shoes for the modern day runners. Most of the running shoes Iāve tried in my life usually skew on the side of very lightweight and cushioned or very durable and rugged but with these shoes you have something in the middle that offers a well balanced supportive sneaker that is also lightweight and comfortable. The fit is very solid and has great support for the feet and the feel is on the bouncier side as if you are walking on a bouncy ball. They are well positioned to use on treadmills and running tracks and wherever you feel fit to run. The design of the shoes make you stand out from the runner next to you because most of them are probably wearing nikes and they all are similar designs and color ways ...Ā MoreThe Nike React Infinity Run FK 4 is a great new vision in running shoes for the modern day runners. Most of the running shoes Iāve tried in my life usually skew on the side of very lightweight and cushioned or very durable and rugged but with these shoes you have something in the middle that offers a well balanced supportive sneaker that is also lightweight and comfortable. The fit is very solid and has great support for the feet and the feel is on the bouncier side as if you are walking on a bouncy ball. They are well positioned to use on treadmills and running tracks and wherever you feel fit to run. The design of the shoes make you stand out from the runner next to you because most of them are probably wearing nikes and they all are similar designs and color ways but with these sneakers you can stand out with the swoosh pushed to the front of the shoes and a stability clip that people are going to notice. The fabric of the shoes feel very durable and supportive to give confidence that you can wear these shoes for a long period of time. My favorite aspect of these shoes would have to be design and the supportive cushioning to make my runs feel like Iām taking my cardio to the next level. The only thing I would change would be the bottom of the shoes wear the material feels very slippery on wet surfaces which people should be cautioned about but I understand in the running perspective this helps with the running experience.
So, I have a pair, size 10.5, of the InfinityRN4 GORE-TEX and absolutely love them. I ordered this, Flyknit upper running shoe, a half size up as recommended, and am happy I did. The ultra-comfortable collar and tongue enables a snug fit with flexibility.The ReactX in the midsole makes it feel as though youāre walking on air. I think the Waffle outsole will make this InfinityRN4 way go to for my Tempo Runs; Especially during transitioning from paved to gravel paths and vice versa. Itās likely they will conform to my feet better after a few runs.Tip: Your first thought after putting them on may be āthey are tight across the top.ā Though the fit will be a lot more comfortable if you adjust the laces correctly.I recommend you order a full size up If you prefer a ...Ā MoreSo, I have a pair, size 10.5, of the InfinityRN4 GORE-TEX and absolutely love them. I ordered this, Flyknit upper running shoe, a half size up as recommended, and am happy I did. The ultra-comfortable collar and tongue enables a snug fit with flexibility.The ReactX in the midsole makes it feel as though youāre walking on air. I think the Waffle outsole will make this InfinityRN4 way go to for my Tempo Runs; Especially during transitioning from paved to gravel paths and vice versa. Itās likely they will conform to my feet better after a few runs.Tip: Your first thought after putting them on may be āthey are tight across the top.ā Though the fit will be a lot more comfortable if you adjust the laces correctly.I recommend you order a full size up If you prefer a looser fit. Though keep in mind they will stretch a bit after you run in them, and may become too loose.I think Nikeās design intent for these is to make a running show that is comfortable and conforming. Thus, making them feel almost non-existent.
The shoe fits almost like a sock and stretches with your footās movement which gives it a nice snug fit. The midsole cushion is amazing. However would like to see more arch support and more cushion in the toe box area. Definitely take the advice and order a half size up per the online recommendation. These definitely run smaller than most shoes due to the stretch fabric design. They are water resistant to a certain extent but not āwaterproofā like the Goretex version which would make this the ultimate running shoe. However the Goretex model is limited to only a few color options so thatās why I stuck with these. Overall a really comfortable and lightweight shoe with good color options to choose from. Very happy with my choice.
I prefer Nike shoes but had been purchasing other running shoes due to a lack of availability with Wide sizes that also looked good in addition to functionality.I spotted this shoe & it WAS available in WIDE and it has been a great purchase!Super comfortable and supportive! Iāve even been able to add some custom orthotics and the fit hasnāt changed, the arch supports fit without any extra work arounds.The support & cushioning you feel on each heel-toe transition is noticeable.The shoes breathe well, after using them exclusively in the sun during morning workouts under the Texas heat, I havenāt noticed any uncomfortable āhot-spots.āLastly, I havenāt felt any slippage of the heel, or loosening of the laces that sometimes require constant adjustment after ...Ā MoreI prefer Nike shoes but had been purchasing other running shoes due to a lack of availability with Wide sizes that also looked good in addition to functionality.I spotted this shoe & it WAS available in WIDE and it has been a great purchase!Super comfortable and supportive! Iāve even been able to add some custom orthotics and the fit hasnāt changed, the arch supports fit without any extra work arounds.The support & cushioning you feel on each heel-toe transition is noticeable.The shoes breathe well, after using them exclusively in the sun during morning workouts under the Texas heat, I havenāt noticed any uncomfortable āhot-spots.āLastly, I havenāt felt any slippage of the heel, or loosening of the laces that sometimes require constant adjustment after starting a workout.Overall a highly recommend purchase!
These are really cool shoes! The tongue design really lends the shoe to a nice, secure, and flexible fit. My initial reaction when putting these shoes on right out of the box was that they were really flexible and responsive shoes. So, from there, I laced these bad boys up and took them straight outside for an easy 2mile run. When I started running, I was a bit fearful of the snug fit. Yes, the notes/additional information about the shoe says they're a sung fit and nike recommends ordering a size up... but I didn't see that. You can't expect me to read that closely while buying shoes! However, I think nike is right about this, if you don't like a really close second skin/sock type fit, you should certainly go up a half a size. But as I continued running, the feel ...Ā MoreThese are really cool shoes! The tongue design really lends the shoe to a nice, secure, and flexible fit. My initial reaction when putting these shoes on right out of the box was that they were really flexible and responsive shoes. So, from there, I laced these bad boys up and took them straight outside for an easy 2mile run. When I started running, I was a bit fearful of the snug fit. Yes, the notes/additional information about the shoe says they're a sung fit and nike recommends ordering a size up... but I didn't see that. You can't expect me to read that closely while buying shoes! However, I think nike is right about this, if you don't like a really close second skin/sock type fit, you should certainly go up a half a size. But as I continued running, the feel really grew on me. They feel snug without being suffocating or binding if that makes sense. The ReactX foam underfoot was very springy and responsive. because they were so soft and spongy, I don't think I would wear these for long grueling runs or runs where your pace is steady, upright, and comfortable (like a noncompetitive 10k run). With such a soft springy underfoot, they seem a bit unstable for a full foot cycle through type run, but I feel like these would be perfect for a quick 5k or a 1600m race pace street run. I ran my 2mile run at a VERY comfortable 12:30 min mile pace. I ran too slow and upright to let these shoes really shine. I will definitely be taking these back out and paying them the respect they deserve. All in all, these are great shoes for the price. I would certainly recommend them.
transitioning from Nike Free run's which i have been running in for 10 years. i am getting older, and looking for a little more padding due to a hip impingement. first impression was this shoe is VERY heavy, but i watched some youtube reviews that say they dont feel heavy when running. Well, they do. I immediately felt the extra weight. My legs tired out quicker, and my times suffered. These shoes also seem to be made for heel strikers. I wore Nike frees to train myself to strike on the ball of my foot. This is where the shoe should flex, but it doesn't want to budge. This caused pain in the ball of my foot right behind where my toes flex. It was just too much work to get the shoe to flex with my foot. A heavy, clunky, stiff shoe for runners. I ordered a half size ...Ā Moretransitioning from Nike Free run's which i have been running in for 10 years. i am getting older, and looking for a little more padding due to a hip impingement. first impression was this shoe is VERY heavy, but i watched some youtube reviews that say they dont feel heavy when running. Well, they do. I immediately felt the extra weight. My legs tired out quicker, and my times suffered. These shoes also seem to be made for heel strikers. I wore Nike frees to train myself to strike on the ball of my foot. This is where the shoe should flex, but it doesn't want to budge. This caused pain in the ball of my foot right behind where my toes flex. It was just too much work to get the shoe to flex with my foot. A heavy, clunky, stiff shoe for runners. I ordered a half size up like recommended
Running is something that I felt like I couldn't or shouldn't really do for awhile but it turns out that I've just been buying the wrong type of shoes.I was very rough on my body when I was younger which resulted in a microfracture surgery on my right knee and currently dealing with a fractured sesamoid on my right foot , so as you can imagine running would usually result in a good bit of pain.I went to a running store and had my feet scanned to help me with running since I overpronate and some shoes aggravate these injuries but just couldn't buy any of the ugly shoes they recommended. I asked ChatGPT for a Nike equivalent to the recommended Brooks and Hoka shoes and landed here.This shoe is amazing, they're basically black magic. I run and feel nothing, the ...Ā MoreRunning is something that I felt like I couldn't or shouldn't really do for awhile but it turns out that I've just been buying the wrong type of shoes.I was very rough on my body when I was younger which resulted in a microfracture surgery on my right knee and currently dealing with a fractured sesamoid on my right foot , so as you can imagine running would usually result in a good bit of pain.I went to a running store and had my feet scanned to help me with running since I overpronate and some shoes aggravate these injuries but just couldn't buy any of the ugly shoes they recommended. I asked ChatGPT for a Nike equivalent to the recommended Brooks and Hoka shoes and landed here.This shoe is amazing, they're basically black magic. I run and feel nothing, the bounce is great, I don't feel any pain in my foot or knee, they feel like they're hugging my feet but in a good way ? It's really wild. Don't hesitate ,make the purchase and you really won't regret it.
