Any track boot will fit more narrow than say an adventure or touring boot. I wear a EE in regular shoes and have never had a problem fitting into any Sidi race boot (3 pair over the years. Dainese seems to fit tighter in width. Gaerne feels just like Sidi to me. Some of the italian companies will also offer different widths, so you may want to check.

Well, you say you have a wide foot, but you really need to be more specific in your question. Are we talking 'EEE' wide here? Notoriously, Italian made boots cater a bit to the narrow side in both heel and toe box. I have a pair of Sidi Fusion Rain boots and they fit narrow. However, I also have a new pair of an older Sidi boot and they fit wide - Sidi Vertigo Air. The later is/was Sidi's track boot. The Fusion is a city/street boot. You can still find Vertigo boots online. I got mine on Ebay. They are D-E width in my opinion. I've tried on Sidi Vortice and they again run narrow. I also own AlpineStar boots and they tend to be snug - again, an Italian boot maker. Sidi, I would tend to say, has revamped the standard way they make boots and to me they tend to be narrow. A-Stars have a better/more normal fit. They're 'boxier' if you will.

You say there is nowhere near you can try on boots in your area? Call your local BMW motorcycle shop. I am pretty sure they'll carry at least Sidi boots there. I'm in the Tampa/St Pete area. The Odessa BMW shop has Sidi boots.

Your best bet is just to order a pair that you like and try them on inside your house for the day. As long as they have not been outside Revzilla will exchange them for another pair or a store credit. Contact Revzilla and a couple other places that ship boots and get mutliple opinions from the sales staff. Most employees ride and give excellent input before you buy.

It's unfortunate, but boots are not a very highly stocked item even in places that carry tons of helmets and jackets.

Sidi boots tend to run narrow.

I've tried both and prefer the S-MX 5 to the Cobra. I have reviews of both on the respective product pages.

In my opinion, the Cobra may have slightly better protection in terms of hard parts. For example, the toe slider and shin protector on the Cobra is larger than those on the S-MX 5 and the Cobra has a lateral slider that's missing from the S-MX 5 (see attached photos, both boots are size 44). The S-MX 5 still, however, feels very protective for this level of boot.

The reason I prefer the S-MX 5 is that, at least for my foot, the S-MX 5 fits MUCH better. The S-MX 5 feels snug yet comfortable, while the Cobra feels very loose around the ankle but almost uncomfortably tight around the toes.

I'd suggest trying both as I think they're both good boots, the S-MX 5 just fit me much better. If both fit me equally as well, I'd probably have gone for the Cobra for what I think is marginally better protection.

that depends on if you have a narrow foot. If so then go with the Sidi Cobras.

SMX-5 is definitely more comfortable than the sidi cobra. They offer the same amount of protection. Sidi's are a little more narrow (hate this personally). Man, for 50 more bux get the dainese TRQ race out boots. They offer crush, twist, extension (forward/backward) so much more protection incase your bike lands on your ankle man. Check out my review I just posted on them. I bought the SMX-5, went to the store, and the guy picked up the boot and goes watch this and bend it in half like a piece of paper. the cobras would do the same. the dainese will not. It's 50 dollars more, and sooo much more protection. I just got the dainese and returned the SMX-5's, it was a great decision. They also look much sportier in person. GREAT BOOT