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Shimano SH-R321 Cycling Shoe - Men's

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Item # SHI005L

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Item # SHI005L

Minted in dreamland.

The engineers at Shimano have apparently been sneaking into the Competitive offices and nosing through our diaries while we're out on lunch rides, because the new SH-R321 Cycling Shoes check off all of our secret (and not-so secret) wish list items for top-caliber road shoes. These features start easy with a customizable thermo-form fit in both the upper and the insole, and they end on a more fanciful note with a mint-scented, antimicrobial treatment. Since that's about all we had, Shimano devised its own wish list to ensure that the R321 Shoes went beyond even our wildest, mint-scented dreams.

Shimano's list starts with the proprietary Dynalast construction, which increases pedal efficiency by a claimed .56% on each stroke. While that doesn't seem like much at first blush, any cyclist who's ridden for longer than two hours understands the importance of marginal gains like this. They can be the difference between finishing a group ride or race at the front or struggling to hang on. Dynalast involves lowering the toe-spring and heel section in relation to the arch and metatarsal areas. This creates an optimal pedaling angle on either side of the up-swing, so the dead time spot is shortened.

The Dynalast construction's marginal gains are especially important for the R321s since they have the stiffest outsole in Shimano's lineup — despite the fact that their Hollow Channel design means that some of Shimano's hollow crankset technology has crept into the shoes, saving weight by clearing out unnecessary material. You can be certain that whether you're burying yourself on a climb or winding up for a sprint, the soles aren't costing you any watts because of weight or flex. The soles are finished with an air intake system that you can enjoy during the summer and easily cover with toe caps come the cooler months.

On top of that impressive list of palmares, the R321 shoes also boast all the same technology of the less expensive R171 model. This includes the Dynalast construction detailed above, as well as Teijin synthetic leather uppers that resist stretching so your fit remains unaltered during long days in the saddle. This is particularly important for the R321s because they incorporate an ingenious new ratcheting buckle closure that can be adjusted fore and aft, letting you dial the fit to an unprecedented level by changing the angle at which the strap tightens.

  • Hollow-channel carbon composite sole
  • Dynalast construction
  • Teijin synthetic leather uppers
  • Thermo-form uppers and insole
  • Adjustable ratcheting buckle closure
  • Custom Fit heel cup

Tech Specs

Upper Material:
Teijin Avail 100 microfiber
1 ratcheting buckle, 2 hook-and-loop straps
thermo-form fit
Hollow Channel Carbon
Cleat Compatibility:
3-bolt road
Recommended Use:
Manufacturer Warranty:
1 year

Size chart


Cycling Shoes
  35 4.5
4 36 5
4.5 37 5.5
5/5.5 37.5  
5/5.5 38 6.5
5.5 38.5  
5.5/6 39 7/7.5
6 39.5  
6.5 40 7.5/8
7/7.5 40.5  
7.5 41 8.5
8 41.5  
8.5 42 9.5
8.5/9 42.5  
9 43 10.5
9/9.5 43.5  
9.5 44 11
10 44.5  
10.5 45  
11 45.5  
11/11.5 46  
11.5 46.5  
12 47  
12.5 48  

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Avg. ride time: 1h 34m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Great quality a bit big

  • Familiarity: I returned this product before using it
  • Fit: Runs large

Just received the shoes in a size 43. I have shimano R088 in a 43 as well that fit very well so I was looking to upgrade thinking they were similar size. These were about a half inch to big in the front and maybe a bit snug in the width.

how come they are so drastically priced reduced? Just curious.

The R321 model is discontinued. At this price, it's a steal - if only they had my size...

The R321 model is discontinued. At this price, it's a steal - if only they had my size...

Avg. ride time: 4h 25m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

A Classic

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 47 wide

The R320 was ground breaking.
It's very possible that I will not wear another cycling shoe, reason being I have Brand new sets of 320's & 321's on hand.

Avg. ride time: 9h 10m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Always a quality shoe

  • Fit: True to size
  • Size Bought: 45 Wide

Great fit, support, and stiffness. 4th set in this lineup over the last 6 years, always with great results. My only desire would be to have a replaceable hill piece since this area wears more quickly, ultimately into the sole plate.


  • Fit: True to size

I switched from Sidi shoes to Shimano when the 321 came out. I've put approximately 4500 miles on these shoes now and they've been a great shoe overall with one slight exception. I really like the slightly wider toe box design and the adjustable arch insoles. This shoe is very comfortable on 3-4 hour rides and equally comfortable hammering up long brutal climbs. Excellent heel cup, I haven't experienced any heel problems at all wearing the Shimano 321's and they have a well designed stiff sole with zero flex. Ratchet buckle has been bullet proof, strong and durable. Excellent ventilation has kept my feet cool and dry through the hot California summer. The only negative point that I've experienced wearing these shoes is during cold or wet winter weather. Your toes will be nearly frozen riding in cold temps or wet conditions, unless you invest in good quality toe covers or full shoe covers, due to the open vents along the front toe area and top of these shoes. Overall, an excellent high performance road shoe. I'll continue riding the 321's until the new Shimano SPhyre is available.

It is the old you can have your cake and eat it too. I love my 321s and in the swampy hot as hell July in Alabama 2016 I could really tell the difference on not "boiling" my toes off in the heat. These shoes have a front grill! Because they vent so well yes, you got to do something about the cooler weather. I bought a pair of LG toe covers that have zero insulation on them and have that patent leather look that goes with the finish of the shoe. After that I go insulated toe covers and for the nasty wet/cold (light rain and 28F last Sunday) I wore the Castelli Narcisista 2 shoe covers and it was all good.

Avg. ride time: 3h 5m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Great for wide feet (US size 9.5 4E)

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: 44 wide

I have very wide feet with high arches (very high volume foot) and have been suffering from painful/numb toes after riding 30-40 miles. I tried everything from insoles to wider cycling shoes to cleat placement and professional bike fitting without success.

(For athletic shoes, I usually wear New Balance 9.5 4E, or size 10 in Altra)

Previously had a pair of Lake TX 212 wide in size 44. This shoe is certainly wide enough, but I was still getting numb toes.

It was then recommended I try a carbon-soled shoe as I was probably creating a pressure point as my heavy weight was causing the Lake TX 212's plastic sole to flex. At the time of purchase, this pair of Shimanos was on sale, so I got it.

It also fits my wide feet very well. And after a few weeks of riding, my numbness is greatly improved.

If you have wide Hobbit feet, get these!

Great shoes !

  • Familiarity: I've put it through the wringer
  • Size Bought: 41

I am very happy I purchased these shoes, they fit perfectly right out of the box. They are true to size.

I take them for granted now, the shoes have been great from day one...I feel like I've had these shoes for years instead of just a few months.
Definitely would recommend buying these shoes.

Love these shoes!

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 42.5

I love these shoes! They fit like a pair of fine gloves. The uppers are soft and pliable and conform to your foot. The bottoms are very stiff and put the power to the peddles! I wear an 8.5 to 9 walking shoe and the 42.5 size fit me perfectly. I did not do the heat forming as I discovered by just wearing them in the summer they will conform to your foot anyway. I have about 500mi on them as of this writing. Do yourself a favor and get a pair!

The Perfect Wide Shoe!!

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size

Let me start by saying that the ball of my foot/forefoot is extremely wide. I have tried about 7 different brands in the wide version and was still having trouble finding the right fit. When I bought this shoe, I was skeptical because I enjoy having the boa dial, but as soon as I put these shoes on I knew these were perfect. These are the only shoes I have found that are wide enough for my feet.
So if you are looking for wide shoes, look no further. I purchased these at the end of summer so I haven't gotten a chance to test these in high temps but they look like they breathe super well. The quality of these shoes look and feel great. The insoles have small inserts to adjust the height of your arch. These are top of the line pro shoes and if you can pick up these at a lower price, that is a steal.
One of drawbacks on these is that the heel guard on the bottom of the shoes is not replaceable, but I gave a 5 star bc I was able to pick these up for just over $200. Paying $400 dollars for a shoes is simply to much (especially when the cost to produce the shoes is so little). Overall, great shoe and I would highly recommend to anyone, especially if you have a wide feet.

High class comfort and power

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: 39.5

These are ridiculously comfortable shoes right out of the box. I love a perfectly fitting pair of shoes and it was as if these were made for my feet. I haven't gotten around to heat molding the insoles, but since they are so comfortable at the moment I don't see the need to.

The soles are extremely stiff and make pedaling extremely efficient. The cleat setup was easy and I am on my way to happy and fast riding.

For sizing - my foot is pretty narrow in the heel but widens out around the ball of the foot so I find Shimano shoes fit my slightly wider forefoot better than some other brands. I am a women's US 7.5, Men's US 6, UK 5 and my sizing can vary in EU depending on the brand. I went off the sizing chart and what I know about my shoe size to pick a 39.5 and extremely happy with the sizing. I don't think I can fit a big winter sock in there but that isn't what I bought them for. But I can comfortably fit a thin sock or a nice thinner wool sock to wear these for most of the year. The ratchet is super easy to use and can be adjusted to get a nice fit over the top of the foot so there is no heel slippage.

I wasn't too sure about the color scheme when I first got them. I wasn't a huge fan of the black and white but after trying them on and seeing them on my feet I must say I immediately fell in love with them.

High class comfort and power
Avg. ride time: 5h 4m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

OMG Best Shoe Fit EVER!

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size

I was riding on a mid-price pair of five year old Shimano road shoes that had seen better days. I kept looking at this R321 shoe and while yes, it is pricey, the specs and reviews on it were up my alley. So I bit the bullet and bought a pair. Before doing so, I researched what bike dealer has the Shimano oven for these shoes and finally found ONE shop in Georgia that has the oven (I live in Alabama). So the shoe arrives and I drive to Georgia the next day to get the shoe custom fitted using the Shimano shoe oven. First did the insole and then did the shoe in the oven. It definitely gets pliable in the oven and you put the shoe on right out of the oven and it is then vacuum bagged so it shrinks down to your foot. I then stood in them for a while for them to completely cool. I took them off, drove back to Alabama, and didn't put them back on until the next day. It was at that moment when I put them on I told my wife, I swear these are the most awesome shoes I have EVER put on my feet, no matter what type, dress, casual, cycling, etc. This shoes fit my fit about as perfect as I could ask. They feel truly custom because they are! So yesterday I went on a short 20 mile ride to test out the shoes and do some cleat adjustments along the way.
Wow, the soles are stiff on this shoe. My feet just don't move around the inside of this shoe in any way. No energy is wasted. My heel is firmly planted in the shoe. The transmission of power with this shoe feels so direct. While it was only 20 miles I had zero hot spot issues. The "front grill" on this shoe really does vent well which being from the deep South, that is very much an appreciated feature. I could really tell a difference on my feet feeling cooler. Now come winter, I can see where booties or toe covers would go on earlier than most other shoes. I may just buy the Shimano R171 for winter since it does not vent nearly as well (and one southern reviewer says that shoe is too darn hot). The R321 is golden I tell you.

One of the best shoes!

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: 45.5 (size 11 American)

I currently own about 5 pair of cycling shoes. These pair of kicks fit like a pair of fine leather gloves, and it does not feel constricted at the ball of the foot. I have really high arches and use the Specialized insoles on my other shoes. The feel is about right, with enough room to wiggle my toes on the regular width size. The craftsmanship is pure magic. These are one of the best looking shoes in the industry and have a very low profile to the ground. Compare to my Sidi's that use the heel cup adjustment tension screws, these shoes are designed to grab your heel without the gimmickry . The reviews were right! Highly recommend these to

Avg. ride time: 12h 32m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Efficient, Comfortable, FAST

  • Familiarity: I've used it several times
  • Fit: True to size

Woah! Wow. Holy sweet son of efficient footwear!?!
Shimano what have you done?
These are exceptional! exquisite! efficient! light! fast! yet the comfort is unmatched! What wizardry is this?

Simply put the on new Shimano SH R321 road shoes, are best designed and executed top end road shoe to date from Shimano. We've had a few weeks together, and among the myriad positives I'll focus on the looks, ride and fit of these race ready kicks.

Facing the reality that all roadies are vain, we gotta talk about looks here. Stealthy confidence with dignified class, untamed speed with calculated precision, Porsche sex appeal with Jaguar bite. All in all, you can't not look like a seasoned road racer in these. You'll look fast, you'll feel fast, you might even go fast.

The Hollow Channel Carbon cannot be topped as the single stiffest and most efficient sole available. No energy is wasted with the confident pedal stroke these shoes empower. Even those experienced with many high end road shoes, will struggle to find a comparable shoe to rival the overall efficient and responsive feel of the R321.

Arguably the most important factor, the fit, is what absolutely seals the deal. Customization is the motif here. Customized insole, customized upper buckle (2 positions), and a customized heat mold will complete a top end fit, tailored to your unique requirements.

That does it folks. These are the real deal.

Thanks for the review Trevor. I am currently looking for new road shoes...riding Sidi Genius 5 for longer than I should. What other road shoes would you compare this Shimano SH 321 too?

These are special. (Update)

  • Familiarity: I've put it through the wringer

I have been using Shimano's top-of-the-line road shoes for the last four years. First the 315's, then the 320's. Both were/are favorites in the pro peloton (look closely at photos). There are two main reasons behind this.

(1) An unrivaled Ventilation system. The 321's feature four subtle "grill" inlets in front combined with breathable upper inserts, and one in the sole, to facilitate flow-through ventilation. This feature keeps your feet drier, cooler, and less clammy. It makes a very noticeable difference, especially during high-tempo riding in warm weather.

(2) Fit. The 321's also feature a very roomy, wide toe box so that you can power down without constriction or pinching of your toes or forefoot. I can wiggle my toes fully; yet my heel and midfoot is totally locked in.

In sum, I can pedal down with full power -and my toes aren't pinched- and my foot is cooler and drier. Fantastic.

Other PROS: Excellent (and beautiful) carbon sole. ... The 321s are pretty light (only 240 g each). ... Super high quality from Shimano, per usual. These people are perfectionists.

Let's face it, a top-of-the-line road shoe from any of the big names is usually a really good shoe. But, IMHO, I think there is nothing out there quite like the Shimano 321's.

Note: These are summer racing shoes. Because of the ventilation, you will need toe covers in weather under ~55° F (cheap, and easy to use) and winter booties in weather under ~45° F.

TIP: When riding in wet weather, wear winter booties (of course), and seal the bottom vent on the shoes with duct tape to prevent wet socks due to water intrusion from front wheel spray (true for any road shoe with a bottom vent).

FIT: Shimano 321's are certainly wider in the forefoot than regular SIDIs (non-mega); which for me really pinch my feet. I think the 321s will fit an average to slightly wide foot very well.

Do you have the regular or wide version of this shoe if I may ask?

Good question. I am 5'9" and 185 lbs. I have average to slightly wide feet (certainly not narrow). I purchased these 321's in the "regular" size 45.0. They fit perfect! The 321's feature a wide toe box. No need for the wide version (unless one has distinctly wide feet). Hope this info helps.

Hi John,
Thanks for the great review. I too have the R320 in a 44 wide and I am wondering how the fit compares to the R321. Did you also wear the R320 in a size 45 and do you find the fit to be different in any way from the R320?

Also did you heat mold either shoe? I never molded my r320s but from some of the reviews I have read they suggest you really need to on the r321 to get a good fit.
Thanks in advance for you response!

Sorry for delay Dimitri. I have found the fit between the 320 and 321 to be very similar. If you have tried the 321s by now, please offer me your impressions.

Lastly, I did -not- heat mold my shoes. I don't have an equipped Shimano dealer nearby. My shoes fit fantastic! My take on the issue is don't worry about it if you can't do it. But if you have an equipped dealer nearby, go for it. It would be worth the ~$50 fitting fee.

Does this shoe have replaceable heel pads or toe pads.

Jerry: Like high-end Sidi? -No.- I agree, that would be good. But in practice, I have not worn through the front or rear pads of even my 320s yet (after two years of use).

But these are lightweight racing shoes. These are not heavy, burly MTB shoes. I take care of mine accordingly. I don't walk around in them much off the bike. If I do, I wear Shimano's cafe cleat covers (part# SH45, avail online for about $18). I've had zero problems.

I bought my second pair of these, and while I didn't go through the heat mold process - I put them out in the sun for a few hours and then put them on, walked into my bedroom (68 degrees) and took a 45 minute nap with the straps down tight. Pretty much does the same thing, they heat these in an oven, put vacuum bags around your feet and then ice them. Regardless, I am 200 pounds, 6 foot 1 inch and have wide feet. The 47's feel like someone painted a shoe onto my foot, and while my Pearl Izumi PRO III's look cooler and are lighter and faster, I can't be in them for more than an hour. I've spent many, many a sportif in these Shimano's!