Half mountain bike shoe, half hiking shoe - you can call the Sidi SD15 the centaur of outdoor shoes. Whether you're setting up camp or avoiding a sketchy section of the trail, the SD15 shoes feature a rugged outsole to provide the kind of off-the-bike grip that'll make you forget you're wearing cycling shoes.
Knowing that pedaling singletrack and striding over boulders and across streams requires a secure footing, Sidi was left with no choice but to employ their TECHNO-3 SYSTEM which dials in fit along the entire length of the shoe, adapting the upper to the shape of the foot for a customized fit. To ensure the shoes maintain their perfect fit over a long life of abuse, reinforced heels keep the foot in an optimal position to prevent warping overtime.
One other clever feature to note about the SD15 MTB shoe is that just about everything on them are either serviceable or replaceable, meaning if something breaks or wears out it's as quick and convenient as removing a few screws or unclipping a clasp to restore them back to business.
"Politex" material offers strong resistance to ripping, laceration, stretching and fading, while being easy on the environment
Sidi's Techno-3 System dials in fit along the entire length of the shoe, adapting the upper to the shape of the foot for a customized fit
Reliable and replaceable closures are improved by an all new proprietary SIDI Wire material that is completely non-binding for intuitive and effortless on-the-fly adjustments
Reinforced heel keeps the foot in an optimal position and avoids the shoe being deformed by extreme performance or prolonged pressure
OUTDOOR rubber high performance sole has the correct density for variable trial conditions and has been designed to provide excellent grip and to easily expel mud and debris
Great SIDI quality in an affordable adventure shoe
I was getting really sore in the wallet after replacing the soles on my Dragon Carbons every few months. Finally the sole plate screws wore out and the SRS inserts won't even install any more, despite the rest of the Dragon shoe being in good shape. I guess I hike-a-bike over limestones that want to kill me more than the other riders… Anyhow, I am really impressed with these — they cost half as much as Dragons, have the same legendary fit, but the soles (non-replaceable) are grippy and don't wear nearly as fast. They aren't as stiff as Carbons, but stiff enough, and much better for burly adventure riding and snow/creek crossing and hike-a-bike boulder strewn talas fields.
Decent, but not quite as good as I'd expect from Sidi
These overall are a decent MTB shoe, but not the high caliber I expect from Sidi, and would benefit from some significant improvement. Considering these are meant for enduro riding, I have found them to be too flexible overall through the midsole, with excessive lateral flex in the mid to heel area - the forefoot is less flexible laterally, but offers sufficient fore-aft flex for scrambling.
These would also benefit from a thicker and stiffer midsole and thicker insole for isolation, because they transmit too much impact when walking, along with a bit too much pedal sensation on strenuous climbing for this price class, though not horribly so, such that you feel your cleats.
Pedaling efficiency/power transfer is decent, although some is lost (probably about 30-35%) because of the stiffness being less than I'd expected - if you're used to other Sidi shoes like the Dominator or Buvel, these will probably disappoint you.
I found the lack of overall stiffness very annoying on a 3-mile hike out on a recent ride, after rupturing a sidewall on my tire, and had very stiff feet and nearly broke my ankle at least twice, because of how easy it is to roll your foot/ankle when walking rough terrain in these.
That said, fit is Sidi's typical excellence, with no heel slip and good volume for mid or slightly larger feet. The tread in the two weeks I've worn these is very good, seems beefy and durable, and grips well, even on wet surfaces like rocks and roots. Can't speak to long-term durability.
The material of the uppers is OK, not stellar like other Sidi's are - I've found it not very water resistant and it has LOTS of give to it, so I expect it may stretch excessively over time. Definitely found that I had to ratchet Sidi's version of the BOA system periodically as I was into my rides, to keep the shoes snug.
Overall I'd give these a 2.5-2.75 star rating, and wouldn't jump to recommend them for serious riders, especially if you're stickler for things like strong power transfer when pedaling, particularly with cleated-pedal setups. These are better suited to more casual riding needs and honestly should be no more than $120, given their glaring deficiencies.
I've been a fan of Sidi motorcycle boots for years, so I was hopeful these would be just as great for cycling. They are. Great on and off the bike. Love the closure system, the fit and function. Great grip from the sole. The construction looks top notch. I'm a big fan and so is everyone who's seen them.
I bought these shoes a couple a few months ago – they were not comfortable but I kept trying to give them a chance. I had thought for the dollar figure I paid they would not have issues I have experienced. The soles are WAY too flexible. The inside is hard, and uncomfortable, made slightly better with a more expensive insole – the insoles they come with are horridly thin and uncomfortable. I like the locking system, but to get things tight enough with all the flex, you end up making your foot fall asleep. They are the most uncomfortable cycling shoes I have ever owned. If I had paid $75.00 for them I might not care. But for $200.00 I feel ashamed of myself for spending so much on these.
Great fit, comfortable but horribly flexible sole.
This shoe has a great lacing system, great fit and is comfortable for walking. Unfortunately it has an incredibly flexible sole (you can fold the shoe in half)d that makes it terrible for cycling of any length.
I bought this shoe for a touring trip we are talking where there will be a fair bit of walking as well as cycling. The shoe would be fine for walking but terrible for cycling and would - for me - be downright painful. Sidi needs to add a stiff shank in this shoe so that it is not flexible up to the area just behind the ball of the foot. If so, this shoe would be an awesome touring shoe. Right now, it’s priced like a fairly decent mtb shoe but has the sole of a sneaker. That’s a miss in my book and if Sidi fixes that in v2.0, I’ll buy it.
As far as sizing go, I wear a 10.5 D width and the 45 fit me well. I could have worn a 44 too.
Fit is true to size. I'm size 10.5 us and fits perfectly. Sort of narrow, as are my feet. I ride alot of backcountry (i.e. steep) trails often on a singlespeed and hike-a-bike alot. This shoe has a great, sticky sole and semi-flexible walking characteristics. Just bought these a week ago so time will tell on durability and comfort in the long term.
Excellent commuter shoe that is descrete, comfortable and easily put on and off.
I bought these shoes to commute on and keep them relatively clean and nice for when I ride into the office. They are incredibly comfortable for running errands around town and walking around the office before I change out of them. I am used to stiff road shoes so the only complaint is they are a little soft and can feel the pedals through the shoe... but that is the compromise for around town comfort.
These shoes hurt my shoulders and back. They hurt before, but I couldn't feel them due to the foot pain from my other shoes haha. First time out and I couldn't tell I had these shoes on while riding. They are amazing shoes and fit great. I have 11.5 w feet and these fit great. I wish I had bought them much sooner!
It’s a great shoe if you are not racing and just out free riding for fun. It fits comfortably for all day. Good traction and flex for hike a bike. Not stiff or light, so not a good choice for serious cross country riders.
I highly recommend these shoes! I purchased these SIDIs having a long history of wearing the brand. These were purposely bought as a back up pair to be used if weather turned bad. I first saw these being worn by a race official in Snowmass, who raved about their flexibility. I was super surprised when I realized (after weighing) that these shoes were only an ounce and a half more than my XC racing’s SIDIs! I ended up using these new shoes right out of the box for the Shenandoah Mountain 100! Weather was horrible and I knew there was going to be a lot of “hike a bike.” I knew using new shoes was taboo, but I had no choice. They were awesome!!! No blisters and my feet never cramped despite lots of h-a-b and numerous knee-deep creek crossings! As for grip, i can’t remeber a single instance where i didn’t feel sure footed. Thanks also to Jennison for getting them there exactly in time!!!
Great shoe, love the actual rubber sole but, I am not impressed with the boa system used to tighten the shoe. To get the shoe tight enough where my heal doesn't lift there is to much pressure on the top of my foot causing my toes to go numb. 3 fasteners is much better for tightening and customizing the fit. Sidi needs to make a Dominator with a rubber sole
I spoke to a Sidi rep at Sea Otter who said this shoe should be listed as a "hybrid" but I'm not even certain that's valid. This shoe is far too flexible to be usable as a cycling shoe. To be honest, it's even too flexible to be considered a hiking shoe.
In addition, the closure, the TECHNO-3 SYSTEM, doesn't work well at all. It's not nearly as easy to use as the BOA (which it is clearly trying to model).
Finally, they run quite big. I'd recommend a size or 2 smaller than you think you need.
Definitely would NOT recommend these to a friend or anyone else. Looks like I'll be going back to my worn out Giros. This is one of those times I wish I could give a negative star rating, as it is I am forced to give these 1 star - which they are not even worth.
I wanted to give it 5 stars for being such a quick and great fitting shoe. My right foot keeps falling asleep during longer rides, likely a positioning thing on my side. Great looks and my feet do not overheat it has helped with efficiency again and only took two rides to dial in the tension setting for quick bail outs.
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