1 of 1 customers found this review helpful.
I really wanted to love these shoes, but realized after 300 miles that I ordered a half size too big. Take heed and do not follow advice to size up. The Sphyres, like all Shimanos, run a little wide in the toebox but are comparable in length to Giro and Sidi...Even though I can't wear these shoes (and probably can't return them), here are some observations based on my limited use
1. The uppers fit seamlessly like a glove around the bridges of your feet, and the double Boa allows extra fine tuning. It's easy to overdo it when you first put these on, so run them a little loose and then adjust once you start riding.
2. The heel cup anchors your heels much better than Sidi's mechanical system. I felt absolutely no play when seated or riding out of the saddle. Rock solid retention makes you feel like you're getting everything out of every pedal stroke.
3. Soles are ridiculously stiff. No power gets gets wasted when you push the pedals. That said, the soles are very thin so you may need to lower your seatpost to accomodate the reduced stack height.
4. Outsoles have lots of markings for precise cleat adjustment, laterally as well as foreaft.
5. The shoes are very light. My 43s (pair) weigh 110g less than the size 42.5 Sidi Megas they replaced.
6. Upper material is fragile, which raises concerns about durability. I somehow scuffed the toebox on my very first ride by putting a foot down at a stoplight. Maybe a coat of nail polish would offer some protection.
Overall, these are nice shoes that sell for a stiff premium (no pun intended). I was expecting them to come with free S-Phyre socks based on internet reviews and unboxings, but mine just had a card stating the socks are sold separately (really Shimano?). If you need a wider toebox shoe but don't want fully wide shoes, Shimanos are hard to beat. After my failed experiment with the S-Phyres, I bought a pair of size 42.5 RP-7s, which fit much better but honestly aren't as comfortable, stiff, or adjustable as the S-Phyres.
Thank you for your feedback.