Five Ten Freerider Pro vs Fox Union Flat – two excellent flat pedal MTB shoes, but which is best?

Two MTB flat shoes facing each other outdoors
Fox and Freerider go toe-to-toe (Image credit: Rich Owen)

Five Ten Freerider Pros have been regarded by many as the best flat pedal MTB shoe for many years now. Earlier this year, Fox Racing released the Fox Union Flat shoe which has given the Freeriders some serious competition, but which shoe is best? I've been spending a chunk of time on both of them to give you the answer.

Before we get started, a couple of there's a couple of points to bear in mind – all my findings are based on wearing size 44 EU (US 10.5, UK 9.5) shoes, and I've had many years of riding in various Freerider Pro shoes, compared to a few months on a single pair of Union Flats.

Also, pricing for the shoes is very similar with the Fox Union Flats having an RRP of $149.95 / £129.99 / €149.99, while the Five Ten Freerider Pros come in at $150.00 / £130.00 / €140.00

View of the soles of two MTB shoes side by side

The Freerider's Dotty sole pattern is deeper and more pronounced than the Union's hexagons (Image credit: Rich Owen)

Pedal grip and feel

The level of grip you get from a flat shoe on the pedal is an essential part of whether the shoe performs of not, as clearly you don't want your feet to be sliding off the pedals midway through a section. The good news is that both shoes offer some of the best grip around. Five Ten's Stealth rubber sole is excellent, as is Fox's Ultrac shod sole too. In theory, the slightly deeper but more widely spaced lugs of the Freeriders offer a little more positional adjustment on the pedal than the Union's hexagonal lugs, but out on the trail, I couldn't really tell any difference.

While there's little to discern between them in terms of vice-like grip, the shoes feel significantly different on the pedal. I rode in odd pairs of them and switched the shoes around to see how each compared. The Five Tens definitely give more feel and feedback, as well as forming around the pedal ever so slightly compared to the Unions, while the stiffer soled Fox shoes give more support and better power transfer along with it.

Grip and feel winner
Its a tie – depending on what level of feel versus support you prefer

Side view of a Five Ten MTB shoe on the ground

The Freerider Pros have slightly lower cut uppers than the Union Flats (Image credit: Rich Owen)

Fit and comfort

I've got slightly narrow feet and almost always take a size 44 shoe, I've found both the shoes on test here to be true to size and a good fit for me. The Unions have a slightly wider sole and mid sole, with a deeper upper than the Freerider Pros which are a touch more minimalist in comparison. Both shoes offer similar levels of foot comfort, though the padding on the tongue of the Freeriders is thicker.

Both shoes have a comfortable insole with arch support too, though the insole is a touch thicker on the Union Flats. Splash resistance and ventilation is once again similar on both models. That said, the Fox shoes have more ventilation holes (not that they felt any cooler) and the lower cut ankle area of the Freeriders makes them a tad more susceptible to puddle splashes and debris finding its way inside.

Fit and comfort winner
It's close, but the Fox Union Flats edge it here


While both shoes feature sturdy toe boxes and reinforced heels, the coverage on the Unions is a deeper at the heel and wraps further over the toes for enhanced protection. The deeper uppers on the Fox shoes give a tad more ankle support too.

Protection winner
Fox Union Flats

The Fox Union flat shoe in the woods

The Fox shoes have more vent holes that the Five Tens, but breathability seems very similar in both shoes (Image credit: Rich Owen)


This is the hardest comparison to make as I've yet to put in as much riding time in with the Unions as I have with the Freeriders. However, the shoes from Fox are still looking good after months of riding and the plastic uppers clean up very well after filthy sessions. The soles are showing the signs of pedal wear, but that's to be expected on flats with long pins.

The Freerider Pros have had more riding time in them, including a full winter, but are looking pretty good all the same. The soles have cut up in places from pedal pins and there's a few creases in the uppers behind the toe area, but no holes or cracks yet. 

Durability winner
A tie – both shoes are looking good for their respective ages


The slightly lower cut shape of the Freerider Pros gives them an advantage in the weight category, so in my size 44 EU version of both shoes, the Five Ten shoes weigh in at 748g per pair, compared to the Union Flats at 838g. Admittedly, 45g per shoe isn't significant and I've not been able to detect any discernible difference weight-wise while riding, but if you're counting the grams, then you might feel differently. Both shoes are lighter than Specialized 2FO DH Flat (872g) and Ride Concepts Tallac (854g) though.

Weight winner
Freerider Pros

Anything else

My only real gripe with the Union Flats is that the laces are the standard sneaker/trainer flat type and are already fraying, so will inevitably snap over time. The laces are also a little on the short side, even with my narrow feet. The Freerider Pro's laces do snag on thorns etc, but are definitely hardier and longer too.

An important aspect of any product these days is sustainability. Both shoes have constructed using manmade rubber and plastic, so are unlikely to be recyclable anywhere. Probably due to the brand's climbing shoe heritage, there are plenty of repairers out there who offer a resoling service for Five Ten shoes using genuine Dotty rubber. Being newer and only released this year, I've not been able to find anything similar for the Fox shoes though.

Adidas (Five Ten's parent company) website states that the brand is committed to being climate neutral across its own operations by 2025 and its entire supply chain by 2050. Adidas are also working towards using more "environmentally preferred materials" and have stated that 20 percent of the materials in its footwear will comply by 2025. The brand also says it has a supply chain code of conduct and human rights for workers manufacturing its products.

Fox have a corporate code of conduct which includes environmental protections and disposing of waste materials in a "responsible manner". Its website also lists protections for workers in its supply chain. Aside from that, I've not been able to find anything on carbon neutrality aims or moving towards more sustainable manufacturing practices.

An odd pair of muddy MTB shoes

While both shoes have been put through their paces, I've put many more riding hours into the Freerider Pros as I've had them for longer (Image credit: Rich Owen)


The good news is that both shoes are excellent performers and are two of the best flat pedal MTB shoes you can buy, so you really can't go wrong – whichever model you decide is right for you.

The Five Ten Freeride Pros are lighter and give better feel and feedback, while the Fox Union Flats give slightly more protection and improved pedal efficiency.

While it sounds like I'm horribly perched on the fence when I say both shoes offer slight advantages over each other and it's very hard to choose an overall winner, it's true. To be honest, the deciding factor for me would be whichever model was on the best deal price at the time.

Overall winner
Yes, it's a tie

Richard Owen
Editor, Bike Perfect

Rich has been riding mountain bikes for over 30 years and mostly likes hitting flowy yet technical trails that point downhill. A jack of many trades, he has competed in cross-country, enduro and long distance MTB races. A resident of North Devon, Rich can mostly be found pedaling furiously around his local trails, or slightly further afield in the Quantocks, the Mendips or Exmoor. 

Current rides: Merida One-Forty 6000, Banshee Paradox

Height: 175cm

Weight: 68kg